./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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/uthash-2.0.2/uthash_FNV_test10-1.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 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 12:37:08,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 12:37:08,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 12:37:08,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 12:37:08,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 12:37:08,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 12:37:08,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 12:37:08,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 12:37:08,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 12:37:08,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 12:37:08,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 12:37:08,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 12:37:08,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 12:37:08,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 12:37:08,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 12:37:08,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 12:37:08,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 12:37:08,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 12:37:08,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 12:37:08,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 12:37:08,229 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 12:37:08,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 12:37:08,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 12:37:08,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 12:37:08,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 12:37:08,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 12:37:08,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 12:37:08,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 12:37:08,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 12:37:08,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 12:37:08,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 12:37:08,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 12:37:08,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 12:37:08,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 12:37:08,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 12:37:08,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 12:37:08,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 12:37:08,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 12:37:08,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 12:37:08,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 12:37:08,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 12:37:08,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 12:37:08,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 12:37:08,269 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 12:37:08,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 12:37:08,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 12:37:08,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 12:37:08,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 12:37:08,270 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 12:37:08,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 12:37:08,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 12:37:08,271 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 12:37:08,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 12:37:08,272 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 12:37:08,272 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 12:37:08,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 12:37:08,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 12:37:08,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 12:37:08,273 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 12:37:08,273 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 12:37:08,273 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 12:37:08,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 12:37:08,273 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 12:37:08,273 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 12:37:08,274 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 12:37:08,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 12:37:08,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 12:37:08,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 12:37:08,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 12:37:08,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 12:37:08,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 12:37:08,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 12:37:08,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 12:37:08,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 [2022-07-23 12:37:08,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 12:37:08,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 12:37:08,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 12:37:08,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 12:37:08,465 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 12:37:08,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2022-07-23 12:37:08,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fdd064db/02ee9ef9862a4a178405b80c7955ad02/FLAGe641c4fa3 [2022-07-23 12:37:08,960 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 12:37:08,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2022-07-23 12:37:08,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fdd064db/02ee9ef9862a4a178405b80c7955ad02/FLAGe641c4fa3 [2022-07-23 12:37:08,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fdd064db/02ee9ef9862a4a178405b80c7955ad02 [2022-07-23 12:37:08,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 12:37:08,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 12:37:08,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 12:37:08,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 12:37:09,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 12:37:09,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 12:37:08" (1/1) ... [2022-07-23 12:37:09,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d9a2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:09, skipping insertion in model container [2022-07-23 12:37:09,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 12:37:08" (1/1) ... [2022-07-23 12:37:09,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 12:37:09,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 12:37:09,344 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i[33022,33035] [2022-07-23 12:37:09,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 12:37:09,535 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-23 12:37:09,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@685ecbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:09, skipping insertion in model container [2022-07-23 12:37:09,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 12:37:09,536 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 12:37:09,538 INFO L158 Benchmark]: Toolchain (without parser) took 539.95ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 68.3MB in the beginning and 92.7MB in the end (delta: -24.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-23 12:37:09,538 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 100.7MB. Free memory is still 57.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 12:37:09,539 INFO L158 Benchmark]: CACSL2BoogieTranslator took 538.33ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 68.0MB in the beginning and 92.7MB in the end (delta: -24.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-23 12:37:09,541 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 100.7MB. Free memory is still 57.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 538.33ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 68.0MB in the beginning and 92.7MB in the end (delta: -24.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/uthash-2.0.2/uthash_FNV_test10-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 12:37:11,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 12:37:11,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 12:37:11,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 12:37:11,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 12:37:11,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 12:37:11,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 12:37:11,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 12:37:11,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 12:37:11,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 12:37:11,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 12:37:11,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 12:37:11,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 12:37:11,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 12:37:11,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 12:37:11,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 12:37:11,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 12:37:11,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 12:37:11,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 12:37:11,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 12:37:11,159 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 12:37:11,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 12:37:11,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 12:37:11,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 12:37:11,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 12:37:11,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 12:37:11,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 12:37:11,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 12:37:11,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 12:37:11,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 12:37:11,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 12:37:11,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 12:37:11,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 12:37:11,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 12:37:11,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 12:37:11,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 12:37:11,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 12:37:11,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 12:37:11,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 12:37:11,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 12:37:11,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 12:37:11,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 12:37:11,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 12:37:11,210 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 12:37:11,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 12:37:11,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 12:37:11,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 12:37:11,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 12:37:11,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 12:37:11,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 12:37:11,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 12:37:11,212 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 12:37:11,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 12:37:11,213 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 12:37:11,213 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 12:37:11,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 12:37:11,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 12:37:11,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 12:37:11,214 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 12:37:11,214 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 12:37:11,214 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 12:37:11,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 12:37:11,215 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 12:37:11,215 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 12:37:11,215 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 12:37:11,215 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 12:37:11,215 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 12:37:11,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 12:37:11,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 12:37:11,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 12:37:11,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 12:37:11,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 12:37:11,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 12:37:11,216 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 12:37:11,217 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 12:37:11,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 12:37:11,217 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 [2022-07-23 12:37:11,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 12:37:11,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 12:37:11,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 12:37:11,523 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 12:37:11,523 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 12:37:11,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2022-07-23 12:37:11,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fef9682e/be571eabf48a4fffa6d6ad1a04383174/FLAGb825105af [2022-07-23 12:37:12,131 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 12:37:12,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2022-07-23 12:37:12,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fef9682e/be571eabf48a4fffa6d6ad1a04383174/FLAGb825105af [2022-07-23 12:37:12,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fef9682e/be571eabf48a4fffa6d6ad1a04383174 [2022-07-23 12:37:12,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 12:37:12,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 12:37:12,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 12:37:12,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 12:37:12,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 12:37:12,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 12:37:12" (1/1) ... [2022-07-23 12:37:12,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a9ab4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:12, skipping insertion in model container [2022-07-23 12:37:12,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 12:37:12" (1/1) ... [2022-07-23 12:37:12,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 12:37:12,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 12:37:12,797 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i[33022,33035] [2022-07-23 12:37:12,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 12:37:12,996 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 12:37:13,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 12:37:13,014 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i[33022,33035] [2022-07-23 12:37:13,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 12:37:13,109 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 12:37:13,126 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i[33022,33035] [2022-07-23 12:37:13,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 12:37:13,221 INFO L208 MainTranslator]: Completed translation [2022-07-23 12:37:13,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13 WrapperNode [2022-07-23 12:37:13,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 12:37:13,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 12:37:13,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 12:37:13,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 12:37:13,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,261 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,340 INFO L137 Inliner]: procedures = 180, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2184 [2022-07-23 12:37:13,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 12:37:13,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 12:37:13,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 12:37:13,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 12:37:13,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 12:37:13,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 12:37:13,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 12:37:13,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 12:37:13,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (1/1) ... [2022-07-23 12:37:13,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 12:37:13,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 12:37:13,521 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) [2022-07-23 12:37:13,540 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 [2022-07-23 12:37:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-23 12:37:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-07-23 12:37:13,553 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-07-23 12:37:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-23 12:37:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-23 12:37:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-23 12:37:13,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-23 12:37:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-23 12:37:13,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 12:37:13,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 12:37:13,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 12:37:13,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 12:37:13,554 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-23 12:37:13,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 12:37:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 12:37:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-23 12:37:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-23 12:37:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 12:37:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 12:37:13,808 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 12:37:13,809 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 12:37:13,811 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-23 12:37:19,551 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 12:37:19,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 12:37:19,566 INFO L299 CfgBuilder]: Removed 151 assume(true) statements. [2022-07-23 12:37:19,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 12:37:19 BoogieIcfgContainer [2022-07-23 12:37:19,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 12:37:19,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 12:37:19,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 12:37:19,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 12:37:19,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 12:37:12" (1/3) ... [2022-07-23 12:37:19,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5571a0f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 12:37:19, skipping insertion in model container [2022-07-23 12:37:19,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:37:13" (2/3) ... [2022-07-23 12:37:19,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5571a0f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 12:37:19, skipping insertion in model container [2022-07-23 12:37:19,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 12:37:19" (3/3) ... [2022-07-23 12:37:19,575 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test10-1.i [2022-07-23 12:37:19,585 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 12:37:19,586 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2022-07-23 12:37:19,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 12:37:19,649 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@555b8224, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@63c0fe38 [2022-07-23 12:37:19,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2022-07-23 12:37:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-23 12:37:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-23 12:37:19,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:19,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-23 12:37:19,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:19,668 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2022-07-23 12:37:19,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:19,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823871620] [2022-07-23 12:37:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:19,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:19,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:19,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:19,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 12:37:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:19,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:37:19,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:19,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:19,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:19,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:19,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823871620] [2022-07-23 12:37:19,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823871620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:19,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:19,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 12:37:19,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33339501] [2022-07-23 12:37:19,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:19,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 12:37:19,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:19,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 12:37:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:19,991 INFO L87 Difference]: Start difference. First operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) 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) [2022-07-23 12:37:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:22,528 INFO L93 Difference]: Finished difference Result 2558 states and 2724 transitions. [2022-07-23 12:37:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 12:37:22,530 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 [2022-07-23 12:37:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:22,546 INFO L225 Difference]: With dead ends: 2558 [2022-07-23 12:37:22,546 INFO L226 Difference]: Without dead ends: 2556 [2022-07-23 12:37:22,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:22,550 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 1951 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:22,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1961 Valid, 1646 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-23 12:37:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-07-23 12:37:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2202. [2022-07-23 12:37:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1224 states have (on average 2.037581699346405) internal successors, (2494), 2186 states have internal predecessors, (2494), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-23 12:37:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2526 transitions. [2022-07-23 12:37:22,645 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2526 transitions. Word has length 3 [2022-07-23 12:37:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:22,646 INFO L495 AbstractCegarLoop]: Abstraction has 2202 states and 2526 transitions. [2022-07-23 12:37:22,646 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) [2022-07-23 12:37:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2526 transitions. [2022-07-23 12:37:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-23 12:37:22,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:22,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-23 12:37:22,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 12:37:22,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:22,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2022-07-23 12:37:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:22,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134450860] [2022-07-23 12:37:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:22,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:22,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:22,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:22,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 12:37:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:23,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 12:37:23,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:23,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:23,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:23,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:23,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134450860] [2022-07-23 12:37:23,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134450860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:23,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:23,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 12:37:23,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837805015] [2022-07-23 12:37:23,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:23,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 12:37:23,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 12:37:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:23,027 INFO L87 Difference]: Start difference. First operand 2202 states and 2526 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) [2022-07-23 12:37:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:26,398 INFO L93 Difference]: Finished difference Result 2973 states and 3378 transitions. [2022-07-23 12:37:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 12:37:26,399 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 [2022-07-23 12:37:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:26,407 INFO L225 Difference]: With dead ends: 2973 [2022-07-23 12:37:26,407 INFO L226 Difference]: Without dead ends: 2973 [2022-07-23 12:37:26,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:26,408 INFO L413 NwaCegarLoop]: 1837 mSDtfsCounter, 844 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 3017 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:26,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 3017 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-23 12:37:26,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2022-07-23 12:37:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2651. [2022-07-23 12:37:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1671 states have (on average 1.9970077797725914) internal successors, (3337), 2632 states have internal predecessors, (3337), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-23 12:37:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3375 transitions. [2022-07-23 12:37:26,460 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3375 transitions. Word has length 3 [2022-07-23 12:37:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:26,460 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 3375 transitions. [2022-07-23 12:37:26,460 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) [2022-07-23 12:37:26,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3375 transitions. [2022-07-23 12:37:26,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 12:37:26,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:26,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:37:26,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-23 12:37:26,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:26,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2022-07-23 12:37:26,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:26,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740444060] [2022-07-23 12:37:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:26,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:26,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:26,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:26,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 12:37:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 12:37:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:26,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:26,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:26,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 12:37:26,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 12:37:26,889 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 12:37:26,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-23 12:37:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:26,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:26,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:26,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740444060] [2022-07-23 12:37:26,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740444060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:26,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:26,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:37:26,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472516251] [2022-07-23 12:37:26,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:26,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:37:26,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:37:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:37:26,910 INFO L87 Difference]: Start difference. First operand 2651 states and 3375 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:32,617 INFO L93 Difference]: Finished difference Result 4906 states and 5782 transitions. [2022-07-23 12:37:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:37:32,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-07-23 12:37:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:32,630 INFO L225 Difference]: With dead ends: 4906 [2022-07-23 12:37:32,630 INFO L226 Difference]: Without dead ends: 4906 [2022-07-23 12:37:32,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:37:32,633 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 4307 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4317 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:32,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4317 Valid, 2067 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-07-23 12:37:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2022-07-23 12:37:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 3370. [2022-07-23 12:37:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 2390 states have (on average 2.0351464435146442) internal successors, (4864), 3345 states have internal predecessors, (4864), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4914 transitions. [2022-07-23 12:37:32,701 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4914 transitions. Word has length 7 [2022-07-23 12:37:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:32,702 INFO L495 AbstractCegarLoop]: Abstraction has 3370 states and 4914 transitions. [2022-07-23 12:37:32,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4914 transitions. [2022-07-23 12:37:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 12:37:32,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:32,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:37:32,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-23 12:37:32,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:32,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:32,913 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2022-07-23 12:37:32,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525078250] [2022-07-23 12:37:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:32,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:32,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:32,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:32,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 12:37:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:33,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:37:33,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:33,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:33,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:33,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:33,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525078250] [2022-07-23 12:37:33,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525078250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:33,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:33,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 12:37:33,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542106164] [2022-07-23 12:37:33,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:33,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 12:37:33,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:33,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 12:37:33,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:33,082 INFO L87 Difference]: Start difference. First operand 3370 states and 4914 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) [2022-07-23 12:37:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:35,445 INFO L93 Difference]: Finished difference Result 4574 states and 6431 transitions. [2022-07-23 12:37:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 12:37:35,446 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 [2022-07-23 12:37:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:35,457 INFO L225 Difference]: With dead ends: 4574 [2022-07-23 12:37:35,457 INFO L226 Difference]: Without dead ends: 4574 [2022-07-23 12:37:35,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:35,458 INFO L413 NwaCegarLoop]: 1967 mSDtfsCounter, 1998 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:35,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 2622 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-23 12:37:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2022-07-23 12:37:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 3279. [2022-07-23 12:37:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 2390 states have (on average 1.9460251046025105) internal successors, (4651), 3254 states have internal predecessors, (4651), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 4701 transitions. [2022-07-23 12:37:35,505 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 4701 transitions. Word has length 8 [2022-07-23 12:37:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:35,505 INFO L495 AbstractCegarLoop]: Abstraction has 3279 states and 4701 transitions. [2022-07-23 12:37:35,505 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) [2022-07-23 12:37:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 4701 transitions. [2022-07-23 12:37:35,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 12:37:35,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:35,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:37:35,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-23 12:37:35,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:35,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:35,713 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2022-07-23 12:37:35,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:35,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573053264] [2022-07-23 12:37:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:35,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:35,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:35,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 12:37:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:35,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 12:37:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:35,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:35,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:35,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:35,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573053264] [2022-07-23 12:37:35,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573053264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:35,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:35,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 12:37:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082645224] [2022-07-23 12:37:35,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:35,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 12:37:35,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 12:37:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:35,876 INFO L87 Difference]: Start difference. First operand 3279 states and 4701 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) [2022-07-23 12:37:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:39,356 INFO L93 Difference]: Finished difference Result 4996 states and 7060 transitions. [2022-07-23 12:37:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 12:37:39,356 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 [2022-07-23 12:37:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:39,367 INFO L225 Difference]: With dead ends: 4996 [2022-07-23 12:37:39,367 INFO L226 Difference]: Without dead ends: 4996 [2022-07-23 12:37:39,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:39,368 INFO L413 NwaCegarLoop]: 2347 mSDtfsCounter, 1371 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:39,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1375 Valid, 3335 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-23 12:37:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2022-07-23 12:37:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 3601. [2022-07-23 12:37:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 2722 states have (on average 1.9335047759000734) internal successors, (5263), 3576 states have internal predecessors, (5263), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5313 transitions. [2022-07-23 12:37:39,414 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5313 transitions. Word has length 8 [2022-07-23 12:37:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:39,414 INFO L495 AbstractCegarLoop]: Abstraction has 3601 states and 5313 transitions. [2022-07-23 12:37:39,414 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) [2022-07-23 12:37:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5313 transitions. [2022-07-23 12:37:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 12:37:39,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:39,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:37:39,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 12:37:39,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:39,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:39,624 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2022-07-23 12:37:39,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:39,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145852129] [2022-07-23 12:37:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:39,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:39,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:39,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:39,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 12:37:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:39,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 12:37:39,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:39,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:39,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145852129] [2022-07-23 12:37:39,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145852129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:39,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:39,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:37:39,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394380135] [2022-07-23 12:37:39,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:39,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 12:37:39,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 12:37:39,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:39,772 INFO L87 Difference]: Start difference. First operand 3601 states and 5313 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:39,803 INFO L93 Difference]: Finished difference Result 3541 states and 5227 transitions. [2022-07-23 12:37:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 12:37:39,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 12:37:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:39,813 INFO L225 Difference]: With dead ends: 3541 [2022-07-23 12:37:39,813 INFO L226 Difference]: Without dead ends: 3541 [2022-07-23 12:37:39,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:39,814 INFO L413 NwaCegarLoop]: 2011 mSDtfsCounter, 801 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 3227 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 [2022-07-23 12:37:39,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 3227 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:37:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2022-07-23 12:37:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3541. [2022-07-23 12:37:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2686 states have (on average 1.9274013402829486) internal successors, (5177), 3516 states have internal predecessors, (5177), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5227 transitions. [2022-07-23 12:37:39,858 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5227 transitions. Word has length 11 [2022-07-23 12:37:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:39,858 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5227 transitions. [2022-07-23 12:37:39,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5227 transitions. [2022-07-23 12:37:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 12:37:39,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:39,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:37:39,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 12:37:40,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:40,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2022-07-23 12:37:40,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:40,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84545326] [2022-07-23 12:37:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:40,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:40,069 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:40,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 12:37:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:40,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:37:40,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:40,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:40,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:40,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84545326] [2022-07-23 12:37:40,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84545326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:40,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:40,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:37:40,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131847496] [2022-07-23 12:37:40,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:40,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:37:40,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:37:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:37:40,237 INFO L87 Difference]: Start difference. First operand 3541 states and 5227 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:40,302 INFO L93 Difference]: Finished difference Result 3513 states and 5171 transitions. [2022-07-23 12:37:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:37:40,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 12:37:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:40,310 INFO L225 Difference]: With dead ends: 3513 [2022-07-23 12:37:40,310 INFO L226 Difference]: Without dead ends: 3513 [2022-07-23 12:37:40,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:37:40,311 INFO L413 NwaCegarLoop]: 1966 mSDtfsCounter, 772 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 5141 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:40,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 5141 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:37:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-07-23 12:37:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2022-07-23 12:37:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2670 states have (on average 1.9172284644194757) internal successors, (5119), 3486 states have internal predecessors, (5119), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5169 transitions. [2022-07-23 12:37:40,354 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5169 transitions. Word has length 13 [2022-07-23 12:37:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:40,355 INFO L495 AbstractCegarLoop]: Abstraction has 3511 states and 5169 transitions. [2022-07-23 12:37:40,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5169 transitions. [2022-07-23 12:37:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 12:37:40,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:40,357 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] [2022-07-23 12:37:40,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-23 12:37:40,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:40,565 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2022-07-23 12:37:40,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:40,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514460500] [2022-07-23 12:37:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:40,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:40,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:40,567 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:40,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 12:37:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 12:37:40,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:40,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:40,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514460500] [2022-07-23 12:37:40,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514460500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:40,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:40,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:37:40,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721418900] [2022-07-23 12:37:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:40,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 12:37:40,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 12:37:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:40,738 INFO L87 Difference]: Start difference. First operand 3511 states and 5169 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:40,781 INFO L93 Difference]: Finished difference Result 4760 states and 6526 transitions. [2022-07-23 12:37:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 12:37:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2022-07-23 12:37:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:40,802 INFO L225 Difference]: With dead ends: 4760 [2022-07-23 12:37:40,802 INFO L226 Difference]: Without dead ends: 4760 [2022-07-23 12:37:40,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:40,803 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 1892 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 4705 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 [2022-07-23 12:37:40,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 4705 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:37:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-07-23 12:37:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3451. [2022-07-23 12:37:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 2634 states have (on average 1.910782080485953) internal successors, (5033), 3426 states have internal predecessors, (5033), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 5083 transitions. [2022-07-23 12:37:40,886 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 5083 transitions. Word has length 20 [2022-07-23 12:37:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:40,886 INFO L495 AbstractCegarLoop]: Abstraction has 3451 states and 5083 transitions. [2022-07-23 12:37:40,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 5083 transitions. [2022-07-23 12:37:40,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 12:37:40,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:40,888 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] [2022-07-23 12:37:40,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 12:37:41,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:41,096 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:41,096 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2022-07-23 12:37:41,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:41,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853216594] [2022-07-23 12:37:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:41,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:41,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:41,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:41,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 12:37:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 12:37:41,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:41,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:41,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:41,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853216594] [2022-07-23 12:37:41,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853216594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:41,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:41,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:37:41,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773179910] [2022-07-23 12:37:41,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:41,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 12:37:41,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:41,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 12:37:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:41,289 INFO L87 Difference]: Start difference. First operand 3451 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:41,343 INFO L93 Difference]: Finished difference Result 4593 states and 6235 transitions. [2022-07-23 12:37:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 12:37:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2022-07-23 12:37:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:41,352 INFO L225 Difference]: With dead ends: 4593 [2022-07-23 12:37:41,352 INFO L226 Difference]: Without dead ends: 4593 [2022-07-23 12:37:41,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:37:41,354 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 1849 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 4566 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 [2022-07-23 12:37:41,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1859 Valid, 4566 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:37:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2022-07-23 12:37:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3319. [2022-07-23 12:37:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 2526 states have (on average 1.8903404592240696) internal successors, (4775), 3294 states have internal predecessors, (4775), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4825 transitions. [2022-07-23 12:37:41,396 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4825 transitions. Word has length 20 [2022-07-23 12:37:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:41,397 INFO L495 AbstractCegarLoop]: Abstraction has 3319 states and 4825 transitions. [2022-07-23 12:37:41,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4825 transitions. [2022-07-23 12:37:41,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 12:37:41,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:41,398 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] [2022-07-23 12:37:41,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-23 12:37:41,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:41,607 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2022-07-23 12:37:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:41,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079390564] [2022-07-23 12:37:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:41,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:41,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:41,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 12:37:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:41,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:37:41,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:41,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:41,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:41,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079390564] [2022-07-23 12:37:41,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079390564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:41,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:41,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:37:41,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560133145] [2022-07-23 12:37:41,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:41,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:37:41,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:37:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:37:41,813 INFO L87 Difference]: Start difference. First operand 3319 states and 4825 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:41,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:41,882 INFO L93 Difference]: Finished difference Result 4558 states and 6169 transitions. [2022-07-23 12:37:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:37:41,883 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 12:37:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:41,889 INFO L225 Difference]: With dead ends: 4558 [2022-07-23 12:37:41,889 INFO L226 Difference]: Without dead ends: 4558 [2022-07-23 12:37:41,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:37:41,890 INFO L413 NwaCegarLoop]: 3168 mSDtfsCounter, 1820 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 7692 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:41,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1830 Valid, 7692 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:37:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2022-07-23 12:37:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 3289. [2022-07-23 12:37:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 2510 states have (on average 1.8792828685258964) internal successors, (4717), 3264 states have internal predecessors, (4717), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4767 transitions. [2022-07-23 12:37:41,931 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4767 transitions. Word has length 22 [2022-07-23 12:37:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:41,931 INFO L495 AbstractCegarLoop]: Abstraction has 3289 states and 4767 transitions. [2022-07-23 12:37:41,931 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4767 transitions. [2022-07-23 12:37:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 12:37:41,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:41,935 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] [2022-07-23 12:37:41,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 12:37:42,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:42,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:42,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2022-07-23 12:37:42,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:42,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434127218] [2022-07-23 12:37:42,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:42,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:42,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:42,146 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:42,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 12:37:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:42,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:37:42,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:42,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:42,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434127218] [2022-07-23 12:37:42,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434127218] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:42,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:42,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:37:42,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106605695] [2022-07-23 12:37:42,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:42,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:37:42,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:42,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:37:42,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:37:42,340 INFO L87 Difference]: Start difference. First operand 3289 states and 4767 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:42,420 INFO L93 Difference]: Finished difference Result 4485 states and 5980 transitions. [2022-07-23 12:37:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:37:42,420 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 12:37:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:42,427 INFO L225 Difference]: With dead ends: 4485 [2022-07-23 12:37:42,427 INFO L226 Difference]: Without dead ends: 4485 [2022-07-23 12:37:42,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:37:42,428 INFO L413 NwaCegarLoop]: 3093 mSDtfsCounter, 1785 mSDsluCounter, 4409 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 7502 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:42,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 7502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:37:42,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2022-07-23 12:37:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3227. [2022-07-23 12:37:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 2462 states have (on average 1.8452477660438669) internal successors, (4543), 3202 states have internal predecessors, (4543), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4593 transitions. [2022-07-23 12:37:42,487 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4593 transitions. Word has length 22 [2022-07-23 12:37:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:42,489 INFO L495 AbstractCegarLoop]: Abstraction has 3227 states and 4593 transitions. [2022-07-23 12:37:42,489 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:42,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4593 transitions. [2022-07-23 12:37:42,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 12:37:42,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:42,490 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] [2022-07-23 12:37:42,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 12:37:42,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:42,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:42,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:42,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2022-07-23 12:37:42,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:42,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056640647] [2022-07-23 12:37:42,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:42,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:42,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:42,701 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:42,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 12:37:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 12:37:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:42,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:42,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:42,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:42,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056640647] [2022-07-23 12:37:42,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056640647] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:42,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:42,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:37:42,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508989888] [2022-07-23 12:37:42,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:42,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:37:42,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:37:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:37:42,884 INFO L87 Difference]: Start difference. First operand 3227 states and 4593 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:45,179 INFO L93 Difference]: Finished difference Result 3502 states and 4766 transitions. [2022-07-23 12:37:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:37:45,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 12:37:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:45,185 INFO L225 Difference]: With dead ends: 3502 [2022-07-23 12:37:45,185 INFO L226 Difference]: Without dead ends: 3502 [2022-07-23 12:37:45,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:37:45,186 INFO L413 NwaCegarLoop]: 1123 mSDtfsCounter, 2363 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:45,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2369 Valid, 2017 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-23 12:37:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-07-23 12:37:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3223. [2022-07-23 12:37:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2462 states have (on average 1.8419983753046303) internal successors, (4535), 3198 states have internal predecessors, (4535), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4585 transitions. [2022-07-23 12:37:45,216 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4585 transitions. Word has length 27 [2022-07-23 12:37:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:45,216 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 4585 transitions. [2022-07-23 12:37:45,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4585 transitions. [2022-07-23 12:37:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 12:37:45,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:45,217 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] [2022-07-23 12:37:45,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 12:37:45,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:45,424 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2022-07-23 12:37:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:45,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049821253] [2022-07-23 12:37:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:45,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:45,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:45,426 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:45,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 12:37:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 12:37:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:45,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:45,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:45,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:45,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049821253] [2022-07-23 12:37:45,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049821253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:45,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:45,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:37:45,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726183639] [2022-07-23 12:37:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:45,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:37:45,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:37:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:37:45,704 INFO L87 Difference]: Start difference. First operand 3223 states and 4585 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:49,360 INFO L93 Difference]: Finished difference Result 3925 states and 5359 transitions. [2022-07-23 12:37:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 12:37:49,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 12:37:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:49,370 INFO L225 Difference]: With dead ends: 3925 [2022-07-23 12:37:49,370 INFO L226 Difference]: Without dead ends: 3925 [2022-07-23 12:37:49,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:37:49,371 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1487 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:49,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 3475 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-23 12:37:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2022-07-23 12:37:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3259. [2022-07-23 12:37:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 2498 states have (on average 1.831865492393915) internal successors, (4576), 3234 states have internal predecessors, (4576), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 4626 transitions. [2022-07-23 12:37:49,399 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 4626 transitions. Word has length 27 [2022-07-23 12:37:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:49,399 INFO L495 AbstractCegarLoop]: Abstraction has 3259 states and 4626 transitions. [2022-07-23 12:37:49,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 4626 transitions. [2022-07-23 12:37:49,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 12:37:49,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:49,400 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] [2022-07-23 12:37:49,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 12:37:49,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:49,613 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2022-07-23 12:37:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:49,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117601282] [2022-07-23 12:37:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:49,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:49,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:49,615 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:49,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 12:37:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 12:37:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:49,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:49,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:49,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:49,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117601282] [2022-07-23 12:37:49,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117601282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:49,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:49,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:37:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929891844] [2022-07-23 12:37:49,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:49,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:37:49,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:49,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:37:49,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:37:49,831 INFO L87 Difference]: Start difference. First operand 3259 states and 4626 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:53,674 INFO L93 Difference]: Finished difference Result 6304 states and 8790 transitions. [2022-07-23 12:37:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:37:53,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-23 12:37:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:53,686 INFO L225 Difference]: With dead ends: 6304 [2022-07-23 12:37:53,686 INFO L226 Difference]: Without dead ends: 6304 [2022-07-23 12:37:53,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:37:53,687 INFO L413 NwaCegarLoop]: 2393 mSDtfsCounter, 3502 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:53,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 4226 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-23 12:37:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2022-07-23 12:37:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 3255. [2022-07-23 12:37:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2498 states have (on average 1.8286629303442754) internal successors, (4568), 3230 states have internal predecessors, (4568), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4618 transitions. [2022-07-23 12:37:53,732 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4618 transitions. Word has length 36 [2022-07-23 12:37:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:53,733 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 4618 transitions. [2022-07-23 12:37:53,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4618 transitions. [2022-07-23 12:37:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 12:37:53,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:53,734 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] [2022-07-23 12:37:53,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-23 12:37:53,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:53,942 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2022-07-23 12:37:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:53,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586823991] [2022-07-23 12:37:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:53,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:53,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:53,945 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:53,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 12:37:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:54,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 12:37:54,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:54,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:37:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:37:54,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:37:54,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:37:54,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586823991] [2022-07-23 12:37:54,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586823991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:37:54,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:37:54,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:37:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181593311] [2022-07-23 12:37:54,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:37:54,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:37:54,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:37:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:37:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:37:54,297 INFO L87 Difference]: Start difference. First operand 3255 states and 4618 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:37:59,519 INFO L93 Difference]: Finished difference Result 5973 states and 8166 transitions. [2022-07-23 12:37:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:37:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-23 12:37:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:37:59,526 INFO L225 Difference]: With dead ends: 5973 [2022-07-23 12:37:59,527 INFO L226 Difference]: Without dead ends: 5973 [2022-07-23 12:37:59,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:37:59,527 INFO L413 NwaCegarLoop]: 2332 mSDtfsCounter, 2860 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 4625 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-23 12:37:59,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2864 Valid, 4625 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-23 12:37:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2022-07-23 12:37:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 3251. [2022-07-23 12:37:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2498 states have (on average 1.8254603682946358) internal successors, (4560), 3226 states have internal predecessors, (4560), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:37:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4610 transitions. [2022-07-23 12:37:59,570 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4610 transitions. Word has length 36 [2022-07-23 12:37:59,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:37:59,571 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 4610 transitions. [2022-07-23 12:37:59,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:37:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4610 transitions. [2022-07-23 12:37:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 12:37:59,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:37:59,572 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] [2022-07-23 12:37:59,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 12:37:59,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:37:59,783 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:37:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:37:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2022-07-23 12:37:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:37:59,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567535118] [2022-07-23 12:37:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:37:59,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:37:59,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:37:59,800 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:37:59,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 12:37:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:37:59,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 12:37:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:37:59,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:38:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:00,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:00,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:00,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567535118] [2022-07-23 12:38:00,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567535118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:00,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:00,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:38:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728144787] [2022-07-23 12:38:00,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:00,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:38:00,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:00,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:38:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:38:00,015 INFO L87 Difference]: Start difference. First operand 3251 states and 4610 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:04,178 INFO L93 Difference]: Finished difference Result 6748 states and 9302 transitions. [2022-07-23 12:38:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 12:38:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-23 12:38:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:04,186 INFO L225 Difference]: With dead ends: 6748 [2022-07-23 12:38:04,186 INFO L226 Difference]: Without dead ends: 6748 [2022-07-23 12:38:04,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:04,187 INFO L413 NwaCegarLoop]: 1965 mSDtfsCounter, 4494 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 3990 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:04,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4504 Valid, 3990 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-23 12:38:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2022-07-23 12:38:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 3248. [2022-07-23 12:38:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8166533226581265) internal successors, (4538), 3223 states have internal predecessors, (4538), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:38:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4588 transitions. [2022-07-23 12:38:04,232 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4588 transitions. Word has length 36 [2022-07-23 12:38:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:04,233 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 4588 transitions. [2022-07-23 12:38:04,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4588 transitions. [2022-07-23 12:38:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 12:38:04,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:04,234 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] [2022-07-23 12:38:04,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:04,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:04,443 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:04,443 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2022-07-23 12:38:04,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:04,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980472180] [2022-07-23 12:38:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:04,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:04,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:04,445 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:04,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 12:38:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 12:38:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:04,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:38:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:04,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:04,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980472180] [2022-07-23 12:38:04,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980472180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:04,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:04,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:38:04,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521605036] [2022-07-23 12:38:04,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:04,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:38:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:38:04,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:38:04,733 INFO L87 Difference]: Start difference. First operand 3248 states and 4588 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:09,365 INFO L93 Difference]: Finished difference Result 4807 states and 6551 transitions. [2022-07-23 12:38:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:38:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-23 12:38:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:09,371 INFO L225 Difference]: With dead ends: 4807 [2022-07-23 12:38:09,372 INFO L226 Difference]: Without dead ends: 4807 [2022-07-23 12:38:09,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:09,372 INFO L413 NwaCegarLoop]: 2238 mSDtfsCounter, 2208 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2208 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:09,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2208 Valid, 4103 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-07-23 12:38:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2022-07-23 12:38:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 3248. [2022-07-23 12:38:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8134507606084869) internal successors, (4530), 3223 states have internal predecessors, (4530), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:38:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4580 transitions. [2022-07-23 12:38:09,443 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4580 transitions. Word has length 36 [2022-07-23 12:38:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:09,444 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 4580 transitions. [2022-07-23 12:38:09,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4580 transitions. [2022-07-23 12:38:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 12:38:09,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:09,444 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] [2022-07-23 12:38:09,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:09,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:09,653 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2022-07-23 12:38:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:09,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808402515] [2022-07-23 12:38:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:09,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:09,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:09,655 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:09,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 12:38:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:38:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:09,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:09,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:09,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808402515] [2022-07-23 12:38:09,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808402515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:09,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:09,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:38:09,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115996974] [2022-07-23 12:38:09,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:09,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:38:09,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:09,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:38:09,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:38:09,844 INFO L87 Difference]: Start difference. First operand 3248 states and 4580 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:09,887 INFO L93 Difference]: Finished difference Result 3236 states and 4556 transitions. [2022-07-23 12:38:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:38:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-23 12:38:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:09,891 INFO L225 Difference]: With dead ends: 3236 [2022-07-23 12:38:09,891 INFO L226 Difference]: Without dead ends: 3236 [2022-07-23 12:38:09,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:09,892 INFO L413 NwaCegarLoop]: 1797 mSDtfsCounter, 756 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 4622 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:09,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 4622 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:38:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2022-07-23 12:38:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3236. [2022-07-23 12:38:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 2486 states have (on average 1.8125502815768302) internal successors, (4506), 3211 states have internal predecessors, (4506), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 12:38:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 4556 transitions. [2022-07-23 12:38:09,924 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 4556 transitions. Word has length 40 [2022-07-23 12:38:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:09,924 INFO L495 AbstractCegarLoop]: Abstraction has 3236 states and 4556 transitions. [2022-07-23 12:38:09,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 4556 transitions. [2022-07-23 12:38:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 12:38:09,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:09,925 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, 1, 1, 1] [2022-07-23 12:38:09,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:10,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:10,133 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:10,134 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2022-07-23 12:38:10,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:10,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674613141] [2022-07-23 12:38:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:10,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:10,140 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:10,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 12:38:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:10,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:38:10,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:10,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:10,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:10,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674613141] [2022-07-23 12:38:10,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674613141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:10,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:10,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:38:10,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321709294] [2022-07-23 12:38:10,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:10,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 12:38:10,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 12:38:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:38:10,459 INFO L87 Difference]: Start difference. First operand 3236 states and 4556 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:10,587 INFO L93 Difference]: Finished difference Result 4684 states and 6375 transitions. [2022-07-23 12:38:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 12:38:10,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-23 12:38:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:10,593 INFO L225 Difference]: With dead ends: 4684 [2022-07-23 12:38:10,593 INFO L226 Difference]: Without dead ends: 4684 [2022-07-23 12:38:10,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:38:10,594 INFO L413 NwaCegarLoop]: 1820 mSDtfsCounter, 1180 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:10,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 3502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 12:38:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2022-07-23 12:38:10,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4020. [2022-07-23 12:38:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 3266 states have (on average 1.7988364972443356) internal successors, (5875), 3988 states have internal predecessors, (5875), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-23 12:38:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5939 transitions. [2022-07-23 12:38:10,674 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5939 transitions. Word has length 48 [2022-07-23 12:38:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:10,674 INFO L495 AbstractCegarLoop]: Abstraction has 4020 states and 5939 transitions. [2022-07-23 12:38:10,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5939 transitions. [2022-07-23 12:38:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 12:38:10,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:10,675 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, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:10,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:10,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:10,883 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:10,884 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2022-07-23 12:38:10,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:10,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309307268] [2022-07-23 12:38:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:10,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:10,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:10,886 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:10,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 12:38:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:11,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:38:11,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:11,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:11,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:11,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309307268] [2022-07-23 12:38:11,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309307268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:11,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:11,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:38:11,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957538436] [2022-07-23 12:38:11,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:11,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:38:11,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:11,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:38:11,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:38:11,167 INFO L87 Difference]: Start difference. First operand 4020 states and 5939 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:11,222 INFO L93 Difference]: Finished difference Result 4959 states and 6922 transitions. [2022-07-23 12:38:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:38:11,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-23 12:38:11,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:11,228 INFO L225 Difference]: With dead ends: 4959 [2022-07-23 12:38:11,228 INFO L226 Difference]: Without dead ends: 4959 [2022-07-23 12:38:11,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:11,229 INFO L413 NwaCegarLoop]: 2867 mSDtfsCounter, 1755 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 6826 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:11,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 6826 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:38:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2022-07-23 12:38:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3978. [2022-07-23 12:38:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3224 states have (on average 1.8005583126550868) internal successors, (5805), 3946 states have internal predecessors, (5805), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-23 12:38:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5869 transitions. [2022-07-23 12:38:11,277 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5869 transitions. Word has length 51 [2022-07-23 12:38:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:11,278 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 5869 transitions. [2022-07-23 12:38:11,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5869 transitions. [2022-07-23 12:38:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 12:38:11,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:11,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:11,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:11,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:11,488 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2022-07-23 12:38:11,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:11,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159043651] [2022-07-23 12:38:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:11,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:11,491 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:11,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 12:38:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:11,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:38:11,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:11,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:11,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:11,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159043651] [2022-07-23 12:38:11,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159043651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:11,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:11,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:38:11,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814296103] [2022-07-23 12:38:11,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:11,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:38:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:38:11,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:38:11,812 INFO L87 Difference]: Start difference. First operand 3978 states and 5869 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:11,876 INFO L93 Difference]: Finished difference Result 4695 states and 6408 transitions. [2022-07-23 12:38:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:38:11,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-07-23 12:38:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:11,883 INFO L225 Difference]: With dead ends: 4695 [2022-07-23 12:38:11,883 INFO L226 Difference]: Without dead ends: 4695 [2022-07-23 12:38:11,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:11,885 INFO L413 NwaCegarLoop]: 2907 mSDtfsCounter, 1746 mSDsluCounter, 4048 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 6955 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:11,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 6955 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:38:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-07-23 12:38:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 3960. [2022-07-23 12:38:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3206 states have (on average 1.8013100436681222) internal successors, (5775), 3928 states have internal predecessors, (5775), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-23 12:38:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5839 transitions. [2022-07-23 12:38:11,929 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5839 transitions. Word has length 54 [2022-07-23 12:38:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:11,929 INFO L495 AbstractCegarLoop]: Abstraction has 3960 states and 5839 transitions. [2022-07-23 12:38:11,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5839 transitions. [2022-07-23 12:38:11,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 12:38:11,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:11,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:11,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:12,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:12,135 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash -495130849, now seen corresponding path program 1 times [2022-07-23 12:38:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:12,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406256867] [2022-07-23 12:38:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:12,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:12,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:12,138 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:12,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 12:38:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 12:38:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:12,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 12:38:12,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 12:38:12,397 INFO L356 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2022-07-23 12:38:12,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 29 treesize of output 36 [2022-07-23 12:38:12,433 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-23 12:38:12,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 20 [2022-07-23 12:38:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:12,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:12,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406256867] [2022-07-23 12:38:12,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406256867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:12,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:12,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:38:12,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49924732] [2022-07-23 12:38:12,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:12,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:38:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:12,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:38:12,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:38:12,463 INFO L87 Difference]: Start difference. First operand 3960 states and 5839 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:13,695 INFO L93 Difference]: Finished difference Result 3926 states and 5804 transitions. [2022-07-23 12:38:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:38:13,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-23 12:38:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:13,700 INFO L225 Difference]: With dead ends: 3926 [2022-07-23 12:38:13,700 INFO L226 Difference]: Without dead ends: 3926 [2022-07-23 12:38:13,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:13,701 INFO L413 NwaCegarLoop]: 1695 mSDtfsCounter, 759 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 4259 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:13,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 4259 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 112 Unchecked, 1.2s Time] [2022-07-23 12:38:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2022-07-23 12:38:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3926. [2022-07-23 12:38:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3172 states have (on average 1.8095838587641866) internal successors, (5740), 3894 states have internal predecessors, (5740), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-23 12:38:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 5804 transitions. [2022-07-23 12:38:13,739 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 5804 transitions. Word has length 57 [2022-07-23 12:38:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:13,739 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 5804 transitions. [2022-07-23 12:38:13,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 5804 transitions. [2022-07-23 12:38:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 12:38:13,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:13,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:13,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:13,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:13,949 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:13,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:13,950 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2022-07-23 12:38:13,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:13,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428578258] [2022-07-23 12:38:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:13,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:13,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:13,951 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:13,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 12:38:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:38:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:14,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:14,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:14,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428578258] [2022-07-23 12:38:14,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428578258] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:14,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:14,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:38:14,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315513103] [2022-07-23 12:38:14,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:14,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 12:38:14,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:14,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 12:38:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:38:14,334 INFO L87 Difference]: Start difference. First operand 3926 states and 5804 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:14,463 INFO L93 Difference]: Finished difference Result 5186 states and 7398 transitions. [2022-07-23 12:38:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 12:38:14,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-23 12:38:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:14,469 INFO L225 Difference]: With dead ends: 5186 [2022-07-23 12:38:14,470 INFO L226 Difference]: Without dead ends: 5186 [2022-07-23 12:38:14,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 12:38:14,470 INFO L413 NwaCegarLoop]: 1948 mSDtfsCounter, 870 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 3621 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:14,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 3621 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 12:38:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5186 states. [2022-07-23 12:38:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 4843. [2022-07-23 12:38:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4083 states have (on average 1.7891256429096252) internal successors, (7305), 4802 states have internal predecessors, (7305), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-23 12:38:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 7387 transitions. [2022-07-23 12:38:14,529 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 7387 transitions. Word has length 59 [2022-07-23 12:38:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:14,529 INFO L495 AbstractCegarLoop]: Abstraction has 4843 states and 7387 transitions. [2022-07-23 12:38:14,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 7387 transitions. [2022-07-23 12:38:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-23 12:38:14,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:14,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:14,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:14,739 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2022-07-23 12:38:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045284456] [2022-07-23 12:38:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:14,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:14,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:14,741 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:14,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 12:38:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:15,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 12:38:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:15,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:38:15,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:38:15,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 12:38:15,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 12:38:15,419 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 12:38:15,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 12:38:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:15,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:15,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:15,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045284456] [2022-07-23 12:38:15,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045284456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:15,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:15,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 12:38:15,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418817965] [2022-07-23 12:38:15,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:15,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:38:15,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:15,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:38:15,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:38:15,432 INFO L87 Difference]: Start difference. First operand 4843 states and 7387 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:18,735 INFO L93 Difference]: Finished difference Result 6874 states and 10400 transitions. [2022-07-23 12:38:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:38:18,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-23 12:38:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:18,742 INFO L225 Difference]: With dead ends: 6874 [2022-07-23 12:38:18,742 INFO L226 Difference]: Without dead ends: 6874 [2022-07-23 12:38:18,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:38:18,743 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 4069 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4083 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:18,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4083 Valid, 1047 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-23 12:38:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2022-07-23 12:38:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 4603. [2022-07-23 12:38:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 3927 states have (on average 1.7122485357779476) internal successors, (6724), 4562 states have internal predecessors, (6724), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-23 12:38:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 6806 transitions. [2022-07-23 12:38:18,785 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 6806 transitions. Word has length 62 [2022-07-23 12:38:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:18,786 INFO L495 AbstractCegarLoop]: Abstraction has 4603 states and 6806 transitions. [2022-07-23 12:38:18,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 6806 transitions. [2022-07-23 12:38:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 12:38:18,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:18,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:18,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:18,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:18,991 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:18,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2022-07-23 12:38:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:18,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209941534] [2022-07-23 12:38:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:18,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:18,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:18,993 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:18,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 12:38:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:19,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 12:38:19,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:19,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:38:19,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:38:19,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 12:38:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:19,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:19,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209941534] [2022-07-23 12:38:19,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209941534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:19,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:19,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:38:19,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303987549] [2022-07-23 12:38:19,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:19,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 12:38:19,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:19,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 12:38:19,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:19,292 INFO L87 Difference]: Start difference. First operand 4603 states and 6806 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:21,961 INFO L93 Difference]: Finished difference Result 4602 states and 6803 transitions. [2022-07-23 12:38:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 12:38:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-23 12:38:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:21,966 INFO L225 Difference]: With dead ends: 4602 [2022-07-23 12:38:21,966 INFO L226 Difference]: Without dead ends: 4602 [2022-07-23 12:38:21,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 12:38:21,966 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 4 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4589 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:21,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4589 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-23 12:38:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-07-23 12:38:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2022-07-23 12:38:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 3927 states have (on average 1.711484593837535) internal successors, (6721), 4561 states have internal predecessors, (6721), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-23 12:38:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6803 transitions. [2022-07-23 12:38:22,000 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6803 transitions. Word has length 67 [2022-07-23 12:38:22,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:22,000 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 6803 transitions. [2022-07-23 12:38:22,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:22,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6803 transitions. [2022-07-23 12:38:22,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 12:38:22,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:22,001 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:22,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:22,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:22,205 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2022-07-23 12:38:22,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:22,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225453239] [2022-07-23 12:38:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:22,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:22,207 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:22,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 12:38:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:22,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 12:38:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:22,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:38:22,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:38:22,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:38:22,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 12:38:22,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 12:38:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:22,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:22,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:22,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225453239] [2022-07-23 12:38:22,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225453239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:22,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:22,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:38:22,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854100069] [2022-07-23 12:38:22,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:22,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 12:38:22,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 12:38:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:22,543 INFO L87 Difference]: Start difference. First operand 4602 states and 6803 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:26,073 INFO L93 Difference]: Finished difference Result 4601 states and 6800 transitions. [2022-07-23 12:38:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 12:38:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-23 12:38:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:26,078 INFO L225 Difference]: With dead ends: 4601 [2022-07-23 12:38:26,078 INFO L226 Difference]: Without dead ends: 4601 [2022-07-23 12:38:26,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 12:38:26,079 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 2 mSDsluCounter, 2846 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4562 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:26,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4562 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-23 12:38:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-07-23 12:38:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4601. [2022-07-23 12:38:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 3924 states have (on average 1.7120285423037718) internal successors, (6718), 4560 states have internal predecessors, (6718), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-23 12:38:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 6800 transitions. [2022-07-23 12:38:26,116 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 6800 transitions. Word has length 67 [2022-07-23 12:38:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:26,116 INFO L495 AbstractCegarLoop]: Abstraction has 4601 states and 6800 transitions. [2022-07-23 12:38:26,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 6800 transitions. [2022-07-23 12:38:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 12:38:26,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:26,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:26,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:26,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:26,330 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:26,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2022-07-23 12:38:26,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:26,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125831843] [2022-07-23 12:38:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:26,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:26,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:26,332 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:26,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 12:38:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:26,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 12:38:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:26,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:38:26,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:38:26,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 12:38:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:26,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:26,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:26,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125831843] [2022-07-23 12:38:26,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125831843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:26,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:26,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:38:26,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445872479] [2022-07-23 12:38:26,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:26,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 12:38:26,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:26,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 12:38:26,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:26,621 INFO L87 Difference]: Start difference. First operand 4601 states and 6800 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:29,076 INFO L93 Difference]: Finished difference Result 4600 states and 6796 transitions. [2022-07-23 12:38:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 12:38:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-23 12:38:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:29,082 INFO L225 Difference]: With dead ends: 4600 [2022-07-23 12:38:29,082 INFO L226 Difference]: Without dead ends: 4600 [2022-07-23 12:38:29,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 12:38:29,083 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 4 mSDsluCounter, 2870 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4584 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:29,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4584 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-23 12:38:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2022-07-23 12:38:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 4600. [2022-07-23 12:38:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 3924 states have (on average 1.7110091743119267) internal successors, (6714), 4559 states have internal predecessors, (6714), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-23 12:38:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 6796 transitions. [2022-07-23 12:38:29,116 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 6796 transitions. Word has length 67 [2022-07-23 12:38:29,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:29,117 INFO L495 AbstractCegarLoop]: Abstraction has 4600 states and 6796 transitions. [2022-07-23 12:38:29,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 6796 transitions. [2022-07-23 12:38:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 12:38:29,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:29,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:29,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:29,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:29,326 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2022-07-23 12:38:29,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:29,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579068495] [2022-07-23 12:38:29,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:29,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:29,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:29,328 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:29,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 12:38:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 12:38:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:29,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:38:29,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:38:29,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:38:29,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 12:38:29,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 12:38:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:29,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:29,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:29,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579068495] [2022-07-23 12:38:29,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579068495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:29,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:29,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:38:29,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932673168] [2022-07-23 12:38:29,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:29,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 12:38:29,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:29,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 12:38:29,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:29,684 INFO L87 Difference]: Start difference. First operand 4600 states and 6796 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:33,112 INFO L93 Difference]: Finished difference Result 4599 states and 6792 transitions. [2022-07-23 12:38:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 12:38:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-23 12:38:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:33,117 INFO L225 Difference]: With dead ends: 4599 [2022-07-23 12:38:33,117 INFO L226 Difference]: Without dead ends: 4599 [2022-07-23 12:38:33,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 12:38:33,117 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 2 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4557 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:33,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4557 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-23 12:38:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2022-07-23 12:38:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4599. [2022-07-23 12:38:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 3920 states have (on average 1.711734693877551) internal successors, (6710), 4558 states have internal predecessors, (6710), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-23 12:38:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 6792 transitions. [2022-07-23 12:38:33,154 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 6792 transitions. Word has length 67 [2022-07-23 12:38:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:33,154 INFO L495 AbstractCegarLoop]: Abstraction has 4599 states and 6792 transitions. [2022-07-23 12:38:33,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 12:38:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 6792 transitions. [2022-07-23 12:38:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-23 12:38:33,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:33,155 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:33,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:33,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:33,365 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:33,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2062362287, now seen corresponding path program 1 times [2022-07-23 12:38:33,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:33,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197491610] [2022-07-23 12:38:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:33,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:33,368 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:33,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 12:38:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:33,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 12:38:33,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:33,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 12:38:33,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:33,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197491610] [2022-07-23 12:38:33,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197491610] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 12:38:33,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 12:38:33,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 12:38:33,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030015095] [2022-07-23 12:38:33,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 12:38:33,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 12:38:33,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 12:38:33,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 12:38:33,646 INFO L87 Difference]: Start difference. First operand 4599 states and 6792 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2022-07-23 12:38:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:33,707 INFO L93 Difference]: Finished difference Result 4602 states and 6801 transitions. [2022-07-23 12:38:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 12:38:33,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 75 [2022-07-23 12:38:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:33,724 INFO L225 Difference]: With dead ends: 4602 [2022-07-23 12:38:33,724 INFO L226 Difference]: Without dead ends: 4602 [2022-07-23 12:38:33,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 12:38:33,725 INFO L413 NwaCegarLoop]: 1713 mSDtfsCounter, 2 mSDsluCounter, 3418 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5131 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:33,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5131 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 12:38:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-07-23 12:38:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2022-07-23 12:38:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 3922 states have (on average 1.7116267210606833) internal successors, (6713), 4561 states have internal predecessors, (6713), 41 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-23 12:38:33,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6801 transitions. [2022-07-23 12:38:33,781 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6801 transitions. Word has length 75 [2022-07-23 12:38:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:33,782 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 6801 transitions. [2022-07-23 12:38:33,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2022-07-23 12:38:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6801 transitions. [2022-07-23 12:38:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-23 12:38:33,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:33,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:33,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:33,995 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1092552202, now seen corresponding path program 1 times [2022-07-23 12:38:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:33,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497620794] [2022-07-23 12:38:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:38:33,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:33,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:33,997 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:33,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 12:38:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:38:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 12:38:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:34,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 12:38:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:34,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:34,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497620794] [2022-07-23 12:38:34,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497620794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 12:38:34,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 12:38:34,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-23 12:38:34,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636931880] [2022-07-23 12:38:34,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 12:38:34,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 12:38:34,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 12:38:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 12:38:34,337 INFO L87 Difference]: Start difference. First operand 4602 states and 6801 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 12:38:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:34,480 INFO L93 Difference]: Finished difference Result 4614 states and 6823 transitions. [2022-07-23 12:38:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 12:38:34,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2022-07-23 12:38:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:34,487 INFO L225 Difference]: With dead ends: 4614 [2022-07-23 12:38:34,488 INFO L226 Difference]: Without dead ends: 4614 [2022-07-23 12:38:34,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-07-23 12:38:34,488 INFO L413 NwaCegarLoop]: 1713 mSDtfsCounter, 15 mSDsluCounter, 6827 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8540 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:34,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8540 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 12:38:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2022-07-23 12:38:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 4612. [2022-07-23 12:38:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 3931 states have (on average 1.7115237852963623) internal successors, (6728), 4570 states have internal predecessors, (6728), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-23 12:38:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 6816 transitions. [2022-07-23 12:38:34,527 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 6816 transitions. Word has length 76 [2022-07-23 12:38:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:34,527 INFO L495 AbstractCegarLoop]: Abstraction has 4612 states and 6816 transitions. [2022-07-23 12:38:34,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 12:38:34,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 6816 transitions. [2022-07-23 12:38:34,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-23 12:38:34,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:34,528 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:34,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:34,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:34,738 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:34,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1024769937, now seen corresponding path program 2 times [2022-07-23 12:38:34,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:34,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018257495] [2022-07-23 12:38:34,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 12:38:34,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:34,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:34,740 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:34,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 12:38:35,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 12:38:35,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 12:38:35,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 12:38:35,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:35,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 12:38:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:35,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:35,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018257495] [2022-07-23 12:38:35,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018257495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 12:38:35,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 12:38:35,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-23 12:38:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268917990] [2022-07-23 12:38:35,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 12:38:35,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 12:38:35,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 12:38:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-23 12:38:35,403 INFO L87 Difference]: Start difference. First operand 4612 states and 6816 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 12:38:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:35,913 INFO L93 Difference]: Finished difference Result 4633 states and 6864 transitions. [2022-07-23 12:38:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 12:38:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 79 [2022-07-23 12:38:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:35,922 INFO L225 Difference]: With dead ends: 4633 [2022-07-23 12:38:35,923 INFO L226 Difference]: Without dead ends: 4629 [2022-07-23 12:38:35,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2022-07-23 12:38:35,923 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 50 mSDsluCounter, 10264 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 11980 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:35,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 11980 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 12:38:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2022-07-23 12:38:35,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 4621. [2022-07-23 12:38:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 3940 states have (on average 1.7106598984771573) internal successors, (6740), 4579 states have internal predecessors, (6740), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-23 12:38:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 6828 transitions. [2022-07-23 12:38:35,972 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 6828 transitions. Word has length 79 [2022-07-23 12:38:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:35,973 INFO L495 AbstractCegarLoop]: Abstraction has 4621 states and 6828 transitions. [2022-07-23 12:38:35,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 12:38:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 6828 transitions. [2022-07-23 12:38:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-23 12:38:35,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:35,974 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:35,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:36,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:36,187 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash 876217103, now seen corresponding path program 3 times [2022-07-23 12:38:36,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:36,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004537560] [2022-07-23 12:38:36,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 12:38:36,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:36,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:36,190 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:36,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 12:38:36,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-23 12:38:36,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 12:38:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 12:38:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:37,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 12:38:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:37,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004537560] [2022-07-23 12:38:37,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004537560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 12:38:37,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 12:38:37,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-23 12:38:37,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002882534] [2022-07-23 12:38:37,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 12:38:37,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 12:38:37,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:37,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 12:38:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-23 12:38:37,526 INFO L87 Difference]: Start difference. First operand 4621 states and 6828 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 12:38:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:40,185 INFO L93 Difference]: Finished difference Result 4663 states and 6965 transitions. [2022-07-23 12:38:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-23 12:38:40,187 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 85 [2022-07-23 12:38:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:40,193 INFO L225 Difference]: With dead ends: 4663 [2022-07-23 12:38:40,193 INFO L226 Difference]: Without dead ends: 4657 [2022-07-23 12:38:40,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2022-07-23 12:38:40,194 INFO L413 NwaCegarLoop]: 1720 mSDtfsCounter, 125 mSDsluCounter, 20567 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 22287 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:40,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 22287 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-23 12:38:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2022-07-23 12:38:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 4639. [2022-07-23 12:38:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 3958 states have (on average 1.7086912582112177) internal successors, (6763), 4597 states have internal predecessors, (6763), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-23 12:38:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 6851 transitions. [2022-07-23 12:38:40,257 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 6851 transitions. Word has length 85 [2022-07-23 12:38:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:40,258 INFO L495 AbstractCegarLoop]: Abstraction has 4639 states and 6851 transitions. [2022-07-23 12:38:40,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 12:38:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 6851 transitions. [2022-07-23 12:38:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-23 12:38:40,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:40,259 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:40,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:40,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:40,472 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:40,473 INFO L85 PathProgramCache]: Analyzing trace with hash -990633905, now seen corresponding path program 4 times [2022-07-23 12:38:40,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:40,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891283740] [2022-07-23 12:38:40,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 12:38:40,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:40,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:40,475 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:40,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-23 12:38:40,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 12:38:40,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 12:38:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 12:38:40,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:41,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 12:38:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 12:38:42,440 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891283740] [2022-07-23 12:38:42,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891283740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 12:38:42,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 12:38:42,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-23 12:38:42,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738310497] [2022-07-23 12:38:42,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 12:38:42,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-23 12:38:42,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:38:42,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-23 12:38:42,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 12:38:42,442 INFO L87 Difference]: Start difference. First operand 4639 states and 6851 transitions. Second operand has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 12:38:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:38:52,370 INFO L93 Difference]: Finished difference Result 4719 states and 7068 transitions. [2022-07-23 12:38:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-23 12:38:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 97 [2022-07-23 12:38:52,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:38:52,384 INFO L225 Difference]: With dead ends: 4719 [2022-07-23 12:38:52,384 INFO L226 Difference]: Without dead ends: 4715 [2022-07-23 12:38:52,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2022-07-23 12:38:52,387 INFO L413 NwaCegarLoop]: 1733 mSDtfsCounter, 419 mSDsluCounter, 41453 mSDsCounter, 0 mSdLazyCounter, 3046 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 43186 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 3046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-23 12:38:52,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 43186 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 3046 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-23 12:38:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2022-07-23 12:38:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4673. [2022-07-23 12:38:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 3992 states have (on average 1.7056613226452906) internal successors, (6809), 4631 states have internal predecessors, (6809), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-23 12:38:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 6897 transitions. [2022-07-23 12:38:52,442 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 6897 transitions. Word has length 97 [2022-07-23 12:38:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:38:52,442 INFO L495 AbstractCegarLoop]: Abstraction has 4673 states and 6897 transitions. [2022-07-23 12:38:52,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 12:38:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 6897 transitions. [2022-07-23 12:38:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-23 12:38:52,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:38:52,447 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:38:52,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-23 12:38:52,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:38:52,655 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:38:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:38:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1014357521, now seen corresponding path program 5 times [2022-07-23 12:38:52,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:38:52,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859755259] [2022-07-23 12:38:52,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 12:38:52,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:38:52,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:38:52,658 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:38:52,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-23 12:38:53,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-23 12:38:53,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 12:38:53,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-23 12:38:53,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:38:53,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:38:54,014 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 12:38:54,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 [2022-07-23 12:38:54,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:38:54,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 10 [2022-07-23 12:38:55,100 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 12:38:55,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 35 [2022-07-23 12:38:55,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 13 [2022-07-23 12:38:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-23 12:38:55,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 12:38:55,330 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2712 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_2712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-23 12:38:55,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:38:55,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859755259] [2022-07-23 12:38:55,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859755259] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 12:38:55,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [389066623] [2022-07-23 12:38:55,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 12:38:55,332 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 12:38:55,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 12:38:55,333 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 12:38:55,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-23 12:40:14,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-23 12:40:14,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 12:40:15,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-23 12:40:15,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:40:15,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:40:15,133 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 12:40:15,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 [2022-07-23 12:40:15,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:40:15,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 10 [2022-07-23 12:40:16,172 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 12:40:16,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 35 [2022-07-23 12:40:16,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 13 [2022-07-23 12:40:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-23 12:40:16,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 12:40:16,366 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3175 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3175) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-23 12:40:16,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [389066623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 12:40:16,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 12:40:16,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-23 12:40:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181414604] [2022-07-23 12:40:16,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 12:40:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 12:40:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 12:40:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 12:40:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=10, NotChecked=38, Total=156 [2022-07-23 12:40:16,371 INFO L87 Difference]: Start difference. First operand 4673 states and 6897 transitions. Second operand has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 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) [2022-07-23 12:40:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 12:40:19,575 INFO L93 Difference]: Finished difference Result 6840 states and 10243 transitions. [2022-07-23 12:40:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 12:40:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 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 119 [2022-07-23 12:40:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 12:40:19,585 INFO L225 Difference]: With dead ends: 6840 [2022-07-23 12:40:19,585 INFO L226 Difference]: Without dead ends: 6836 [2022-07-23 12:40:19,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 143 SyntacticMatches, 90 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=43, Invalid=109, Unknown=12, NotChecked=46, Total=210 [2022-07-23 12:40:19,585 INFO L413 NwaCegarLoop]: 972 mSDtfsCounter, 1589 mSDsluCounter, 4270 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 5916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3303 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-23 12:40:19,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 5242 Invalid, 5916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2601 Invalid, 0 Unknown, 3303 Unchecked, 3.1s Time] [2022-07-23 12:40:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2022-07-23 12:40:19,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 4721. [2022-07-23 12:40:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4040 states have (on average 1.6967821782178218) internal successors, (6855), 4678 states have internal predecessors, (6855), 41 states have call successors, (41), 5 states have call predecessors, (41), 6 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-23 12:40:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 6943 transitions. [2022-07-23 12:40:19,631 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 6943 transitions. Word has length 119 [2022-07-23 12:40:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 12:40:19,631 INFO L495 AbstractCegarLoop]: Abstraction has 4721 states and 6943 transitions. [2022-07-23 12:40:19,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 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) [2022-07-23 12:40:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 6943 transitions. [2022-07-23 12:40:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-23 12:40:19,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 12:40:19,633 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 12:40:19,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-07-23 12:40:19,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-23 12:40:20,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 12:40:20,048 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-23 12:40:20,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 12:40:20,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1014357520, now seen corresponding path program 1 times [2022-07-23 12:40:20,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 12:40:20,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523017920] [2022-07-23 12:40:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:40:20,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 12:40:20,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 12:40:20,050 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 12:40:20,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-23 12:40:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 12:40:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-23 12:40:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 12:40:20,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:40:20,881 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 12:40:20,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 12:40:20,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 12:40:20,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:40:20,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 12:40:20,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 10 [2022-07-23 12:40:20,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 3 [2022-07-23 12:40:21,055 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3555 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3555))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3556 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3556) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 12:40:21,062 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3557 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3557) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3558 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3558))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-23 12:40:21,131 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3565 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3565))) (exists ((v_ArrVal_3566 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3566)))) is different from true [2022-07-23 12:40:21,139 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3567 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3567))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3568 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3568)))) is different from true [2022-07-23 12:40:21,146 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3570 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3570))) (exists ((v_ArrVal_3569 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3569)))) is different from true [2022-07-23 12:40:21,204 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3577 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3577) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3578 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3578) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 12:40:21,263 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3585 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3585) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3586 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3586)))) is different from true [2022-07-23 12:40:21,270 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3588 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3588))) (exists ((v_ArrVal_3587 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3587) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 12:40:21,329 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3595 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3595))) (exists ((v_ArrVal_3596 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3596) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 12:40:21,376 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3599 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3599))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3600 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3600) |c_#memory_$Pointer$.base|))) is different from true [2022-07-23 12:40:21,418 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3605 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3605) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3606 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3606)))) is different from true [2022-07-23 12:40:21,425 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3608 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3608) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3607 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3607) |c_#memory_$Pointer$.base|))) is different from true [2022-07-23 12:40:21,432 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3609 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3609) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3610 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3610)))) is different from true [2022-07-23 12:40:21,439 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3611 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3611))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3612 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3612) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 12:40:21,447 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3614 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3614) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3613 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3613) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 12:40:21,455 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3615 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3615) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3616 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3616)))) is different from true [2022-07-23 12:40:21,462 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3617) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_3618 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3618)))) is different from true [2022-07-23 12:40:21,470 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3620 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3620))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3619 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3619) |c_#memory_$Pointer$.base|))) is different from true [2022-07-23 12:40:21,477 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3621))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3622 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3622)))) is different from true [2022-07-23 12:40:21,484 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3623 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3623) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3624 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3624)))) is different from true [2022-07-23 12:40:21,492 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3625 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3625))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3626 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3626)))) is different from true [2022-07-23 12:40:21,500 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3627 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3627))) (exists ((v_ArrVal_3628 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3628)))) is different from true [2022-07-23 12:40:21,528 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3631 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3631) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3632 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3632)))) is different from true [2022-07-23 12:40:21,555 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3636 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3636))) (exists ((v_ArrVal_3635 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3635) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-23 12:40:21,599 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 12:40:21,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 45 [2022-07-23 12:40:21,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 24 [2022-07-23 12:40:21,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 13 [2022-07-23 12:40:21,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2022-07-23 12:40:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 190 trivial. 780 not checked. [2022-07-23 12:40:21,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 12:40:22,293 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3729) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2022-07-23 12:40:22,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 12:40:22,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523017920] [2022-07-23 12:40:22,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523017920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 12:40:22,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1591835553] [2022-07-23 12:40:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 12:40:22,299 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 12:40:22,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 12:40:22,300 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 12:40:22,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process