/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:21:09,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:21:09,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:21:09,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:21:09,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:21:09,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:21:09,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:21:09,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:21:09,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:21:09,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:21:09,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:21:09,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:21:09,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:21:09,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:21:09,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:21:09,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:21:09,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:21:09,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:21:09,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:21:09,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:21:09,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:21:09,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:21:09,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:21:09,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:21:09,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:21:09,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:21:09,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:21:09,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:21:09,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:21:09,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-19 23:21:09,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 23:21:09,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 23:21:09,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 23:21:09,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 23:21:09,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 23:21:09,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 23:21:09,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 23:21:09,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 23:21:09,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:21:09,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:21:09,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:21:09,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 23:21:09,204 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:21:09,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:21:09,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:21:09,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:21:09,206 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:21:09,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:21:09,206 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:21:09,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:21:09,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:21:09,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:21:09,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:21:09,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:21:09,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:21:09,208 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:21:09,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:21:09,208 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:21:09,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:21:09,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:21:09,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:21:09,209 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:21:09,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:21:09,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:21:09,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:21:09,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:21:09,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:21:09,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:21:09,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:21:09,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:21:09,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:21:09,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:21:09,552 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:21:09,566 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:21:09,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:21:09,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:21:09,572 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:21:09,573 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-07-19 23:21:09,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c351da3e/8b04db2239234c98a69c5145f4b61f87/FLAGe455db594 [2020-07-19 23:21:10,134 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:21:10,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-07-19 23:21:10,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c351da3e/8b04db2239234c98a69c5145f4b61f87/FLAGe455db594 [2020-07-19 23:21:10,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c351da3e/8b04db2239234c98a69c5145f4b61f87 [2020-07-19 23:21:10,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:21:10,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:21:10,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:21:10,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:21:10,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:21:10,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:21:10" (1/1) ... [2020-07-19 23:21:10,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fbbe8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:10, skipping insertion in model container [2020-07-19 23:21:10,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:21:10" (1/1) ... [2020-07-19 23:21:10,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:21:10,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:21:10,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:21:10,976 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:21:11,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:21:11,090 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:21:11,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11 WrapperNode [2020-07-19 23:21:11,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:21:11,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:21:11,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:21:11,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:21:11,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11" (1/1) ... [2020-07-19 23:21:11,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11" (1/1) ... [2020-07-19 23:21:11,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11" (1/1) ... [2020-07-19 23:21:11,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11" (1/1) ... [2020-07-19 23:21:11,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11" (1/1) ... [2020-07-19 23:21:11,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11" (1/1) ... [2020-07-19 23:21:11,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11" (1/1) ... [2020-07-19 23:21:11,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:21:11,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:21:11,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:21:11,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:21:11,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:21:11,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:21:11,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:21:11,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:21:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-19 23:21:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-19 23:21:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-19 23:21:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-19 23:21:11,225 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-19 23:21:11,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-19 23:21:11,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-19 23:21:11,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-19 23:21:11,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-19 23:21:11,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-19 23:21:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-19 23:21:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-19 23:21:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-19 23:21:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-19 23:21:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-19 23:21:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-19 23:21:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-19 23:21:11,229 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-19 23:21:11,229 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-19 23:21:11,229 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-19 23:21:11,229 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-19 23:21:11,231 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-19 23:21:11,231 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-19 23:21:11,232 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-19 23:21:11,232 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-19 23:21:11,232 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-19 23:21:11,232 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-19 23:21:11,232 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-19 23:21:11,232 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-19 23:21:11,233 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-19 23:21:11,233 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-19 23:21:11,233 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-19 23:21:11,233 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-19 23:21:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-19 23:21:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-19 23:21:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-19 23:21:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-19 23:21:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-19 23:21:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-19 23:21:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-19 23:21:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-19 23:21:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-19 23:21:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-19 23:21:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-19 23:21:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-19 23:21:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-19 23:21:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-19 23:21:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-19 23:21:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-19 23:21:11,237 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-19 23:21:11,237 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 23:21:11,238 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-19 23:21:11,238 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-19 23:21:11,238 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-19 23:21:11,238 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-19 23:21:11,238 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-19 23:21:11,239 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-19 23:21:11,239 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-19 23:21:11,240 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-19 23:21:11,240 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:21:11,240 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-19 23:21:11,240 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-19 23:21:11,240 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-19 23:21:11,241 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-19 23:21:11,241 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-19 23:21:11,242 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-19 23:21:11,242 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-19 23:21:11,242 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-19 23:21:11,242 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-19 23:21:11,243 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-19 23:21:11,243 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-19 23:21:11,243 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-19 23:21:11,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-19 23:21:11,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-19 23:21:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-19 23:21:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-19 23:21:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-19 23:21:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-19 23:21:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-19 23:21:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-19 23:21:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-19 23:21:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-19 23:21:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-19 23:21:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-19 23:21:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-19 23:21:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-19 23:21:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-19 23:21:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-19 23:21:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-19 23:21:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-19 23:21:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-19 23:21:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-19 23:21:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-19 23:21:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-19 23:21:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-19 23:21:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-19 23:21:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 23:21:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:21:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-19 23:21:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-19 23:21:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:21:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:21:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:21:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:21:11,791 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:21:11,792 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-19 23:21:11,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:21:11 BoogieIcfgContainer [2020-07-19 23:21:11,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:21:11,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:21:11,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:21:11,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:21:11,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:21:10" (1/3) ... [2020-07-19 23:21:11,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e82214e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:21:11, skipping insertion in model container [2020-07-19 23:21:11,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:21:11" (2/3) ... [2020-07-19 23:21:11,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e82214e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:21:11, skipping insertion in model container [2020-07-19 23:21:11,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:21:11" (3/3) ... [2020-07-19 23:21:11,805 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-07-19 23:21:11,815 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:21:11,823 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-07-19 23:21:11,837 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-07-19 23:21:11,860 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:21:11,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:21:11,860 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:21:11,860 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:21:11,861 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:21:11,862 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:21:11,862 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:21:11,862 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:21:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-19 23:21:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 23:21:11,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:21:11,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:21:11,888 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:21:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:21:11,894 INFO L82 PathProgramCache]: Analyzing trace with hash -742552803, now seen corresponding path program 1 times [2020-07-19 23:21:11,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:21:11,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474075276] [2020-07-19 23:21:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@626b7975 [2020-07-19 23:21:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:12,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474075276] [2020-07-19 23:21:12,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:21:12,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:21:12,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140116478] [2020-07-19 23:21:12,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:21:12,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:21:12,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:21:12,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:21:12,120 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-07-19 23:21:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:21:12,241 INFO L93 Difference]: Finished difference Result 67 states and 104 transitions. [2020-07-19 23:21:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:21:12,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-19 23:21:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:21:12,254 INFO L225 Difference]: With dead ends: 67 [2020-07-19 23:21:12,254 INFO L226 Difference]: Without dead ends: 31 [2020-07-19 23:21:12,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:21:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-19 23:21:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-19 23:21:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 23:21:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-07-19 23:21:12,328 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2020-07-19 23:21:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:21:12,329 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-07-19 23:21:12,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:21:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-07-19 23:21:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-19 23:21:12,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:21:12,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:21:12,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:21:12,331 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:21:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:21:12,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1556669446, now seen corresponding path program 1 times [2020-07-19 23:21:12,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:21:12,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647426075] [2020-07-19 23:21:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@626b7975 [2020-07-19 23:21:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:12,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647426075] [2020-07-19 23:21:12,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:21:12,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:21:12,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837055696] [2020-07-19 23:21:12,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:21:12,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:21:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:21:12,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:21:12,443 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-07-19 23:21:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:21:12,553 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-07-19 23:21:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:21:12,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-19 23:21:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:21:12,555 INFO L225 Difference]: With dead ends: 37 [2020-07-19 23:21:12,555 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 23:21:12,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:21:12,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 23:21:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-07-19 23:21:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 23:21:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-19 23:21:12,562 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2020-07-19 23:21:12,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:21:12,563 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-19 23:21:12,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:21:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-19 23:21:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 23:21:12,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:21:12,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:21:12,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:21:12,564 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:21:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:21:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1973625457, now seen corresponding path program 1 times [2020-07-19 23:21:12,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:21:12,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127186619] [2020-07-19 23:21:12,565 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@626b7975 [2020-07-19 23:21:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:12,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127186619] [2020-07-19 23:21:12,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:21:12,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:21:12,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670001845] [2020-07-19 23:21:12,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:21:12,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:21:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:21:12,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:21:12,705 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-07-19 23:21:12,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:21:12,859 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-07-19 23:21:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:21:12,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-19 23:21:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:21:12,861 INFO L225 Difference]: With dead ends: 54 [2020-07-19 23:21:12,861 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 23:21:12,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:21:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 23:21:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-07-19 23:21:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 23:21:12,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-19 23:21:12,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 14 [2020-07-19 23:21:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:21:12,870 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-19 23:21:12,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:21:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-19 23:21:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 23:21:12,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:21:12,872 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:21:12,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 23:21:12,872 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:21:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:21:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash -954667545, now seen corresponding path program 1 times [2020-07-19 23:21:12,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:21:12,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425218071] [2020-07-19 23:21:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@626b7975 [2020-07-19 23:21:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:13,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425218071] [2020-07-19 23:21:13,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085144115] [2020-07-19 23:21:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@578ccf10 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:21:13,521 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@578ccf10 issued 2 check-sat command(s) [2020-07-19 23:21:13,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:21:13,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 23:21:13,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:21:13,651 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-19 23:21:13,652 INFO L384 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-07-19 23:21:13,653 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:13,667 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:13,673 INFO L384 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 [2020-07-19 23:21:13,674 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:13,687 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:13,688 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:13,688 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:29 [2020-07-19 23:21:13,771 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:13,771 INFO L384 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 39 [2020-07-19 23:21:13,773 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:13,835 INFO L624 ElimStorePlain]: treesize reduction 14, result has 81.1 percent of original size [2020-07-19 23:21:13,842 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:13,859 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:13,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:21:13,867 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2020-07-19 23:21:13,868 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:13,881 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:13,882 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:13,882 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:27 [2020-07-19 23:21:13,951 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:13,952 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-19 23:21:13,953 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:13,988 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:13,990 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_29|, |v_#memory_int_30|], 4=[|v_#memory_int_32|]} [2020-07-19 23:21:13,994 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:14,015 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:14,018 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:14,039 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:14,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:21:14,064 INFO L350 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2020-07-19 23:21:14,065 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2020-07-19 23:21:14,066 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:14,085 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:14,089 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:14,090 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:80, output treesize:43 [2020-07-19 23:21:14,197 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2020-07-19 23:21:14,198 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:14,204 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:14,205 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:14,205 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2020-07-19 23:21:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:14,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:21:14,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-07-19 23:21:14,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527936553] [2020-07-19 23:21:14,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:21:14,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:21:14,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:21:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:21:14,212 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2020-07-19 23:21:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:21:20,880 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-07-19 23:21:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:21:20,881 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-07-19 23:21:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:21:20,882 INFO L225 Difference]: With dead ends: 62 [2020-07-19 23:21:20,882 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:21:20,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:21:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:21:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 27. [2020-07-19 23:21:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:21:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-19 23:21:20,889 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-19 23:21:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:21:20,889 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-19 23:21:20,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:21:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-19 23:21:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 23:21:20,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:21:20,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:21:21,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:21:21,103 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:21:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:21:21,103 INFO L82 PathProgramCache]: Analyzing trace with hash 903516662, now seen corresponding path program 1 times [2020-07-19 23:21:21,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:21:21,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944412973] [2020-07-19 23:21:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@626b7975 [2020-07-19 23:21:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:21,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944412973] [2020-07-19 23:21:21,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:21:21,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:21:21,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887534428] [2020-07-19 23:21:21,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:21:21,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:21:21,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:21:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:21:21,215 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-07-19 23:21:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:21:21,334 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-07-19 23:21:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:21:21,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-19 23:21:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:21:21,336 INFO L225 Difference]: With dead ends: 42 [2020-07-19 23:21:21,336 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:21:21,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:21:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:21:21,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-19 23:21:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 23:21:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-19 23:21:21,347 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2020-07-19 23:21:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:21:21,347 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-19 23:21:21,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:21:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-19 23:21:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 23:21:21,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:21:21,350 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:21:21,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 23:21:21,350 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:21:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:21:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1223911862, now seen corresponding path program 1 times [2020-07-19 23:21:21,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:21:21,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556610284] [2020-07-19 23:21:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@626b7975 [2020-07-19 23:21:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:21,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556610284] [2020-07-19 23:21:21,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810808758] [2020-07-19 23:21:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26ae56df No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:21:21,624 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26ae56df issued 2 check-sat command(s) [2020-07-19 23:21:21,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:21:21,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 23:21:21,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:21:21,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:21:21,686 INFO L350 Elim1Store]: treesize reduction 33, result has 55.4 percent of original size [2020-07-19 23:21:21,687 INFO L384 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 1 case distinctions, treesize of input 38 treesize of output 48 [2020-07-19 23:21:21,688 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:21,743 INFO L624 ElimStorePlain]: treesize reduction 16, result has 81.4 percent of original size [2020-07-19 23:21:21,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:21:21,807 INFO L350 Elim1Store]: treesize reduction 33, result has 55.4 percent of original size [2020-07-19 23:21:21,808 INFO L384 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 1 case distinctions, treesize of input 38 treesize of output 48 [2020-07-19 23:21:21,809 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:21,868 INFO L624 ElimStorePlain]: treesize reduction 16, result has 79.7 percent of original size [2020-07-19 23:21:21,869 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:21,869 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2020-07-19 23:21:21,963 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-19 23:21:21,970 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-19 23:21:21,984 INFO L384 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 [2020-07-19 23:21:21,984 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:21,996 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:21,997 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2020-07-19 23:21:21,997 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:22,000 INFO L384 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 15 treesize of output 7 [2020-07-19 23:21:22,001 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:22,047 INFO L624 ElimStorePlain]: treesize reduction 12, result has 84.6 percent of original size [2020-07-19 23:21:22,052 INFO L384 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 15 treesize of output 7 [2020-07-19 23:21:22,052 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:22,060 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:22,061 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2020-07-19 23:21:22,062 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:22,074 INFO L384 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 [2020-07-19 23:21:22,074 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:22,096 INFO L624 ElimStorePlain]: treesize reduction 20, result has 25.9 percent of original size [2020-07-19 23:21:22,096 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:22,097 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:110, output treesize:7 [2020-07-19 23:21:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:22,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:21:22,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-07-19 23:21:22,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367513468] [2020-07-19 23:21:22,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:21:22,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:21:22,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:21:22,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:21:22,122 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 11 states. [2020-07-19 23:21:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:21:22,602 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-07-19 23:21:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:21:22,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-07-19 23:21:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:21:22,603 INFO L225 Difference]: With dead ends: 57 [2020-07-19 23:21:22,603 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 23:21:22,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:21:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 23:21:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-07-19 23:21:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 23:21:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-07-19 23:21:22,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2020-07-19 23:21:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:21:22,610 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-07-19 23:21:22,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:21:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-07-19 23:21:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 23:21:22,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:21:22,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:21:22,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:21:22,813 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:21:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:21:22,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476830, now seen corresponding path program 1 times [2020-07-19 23:21:22,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:21:22,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687093751] [2020-07-19 23:21:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@626b7975 [2020-07-19 23:21:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:23,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687093751] [2020-07-19 23:21:23,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134717185] [2020-07-19 23:21:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@296ca587 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:21:23,365 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@296ca587 issued 3 check-sat command(s) [2020-07-19 23:21:23,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:21:23,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 23:21:23,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:21:23,395 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-19 23:21:23,396 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-07-19 23:21:23,397 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:23,404 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:23,405 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:23,405 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:21 [2020-07-19 23:21:23,482 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:23,483 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 69 [2020-07-19 23:21:23,484 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:23,559 INFO L624 ElimStorePlain]: treesize reduction 28, result has 74.5 percent of original size [2020-07-19 23:21:23,566 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-19 23:21:23,567 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:23,590 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:23,594 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-19 23:21:23,594 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:23,612 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:23,612 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:23,613 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:80, output treesize:56 [2020-07-19 23:21:23,724 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:23,724 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2020-07-19 23:21:23,725 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:23,804 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:23,810 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:23,861 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:24,059 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-07-19 23:21:24,060 INFO L350 Elim1Store]: treesize reduction 254, result has 40.9 percent of original size [2020-07-19 23:21:24,061 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 233 treesize of output 275 [2020-07-19 23:21:24,064 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[11, 3, 2, 1] term [2020-07-19 23:21:24,065 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 11 disjuncts [2020-07-19 23:21:24,066 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:24,169 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-07-19 23:21:24,171 INFO L624 ElimStorePlain]: treesize reduction 144, result has 56.8 percent of original size [2020-07-19 23:21:24,178 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:24,208 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:24,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:21:24,228 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:24,229 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 89 [2020-07-19 23:21:24,231 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:24,283 INFO L624 ElimStorePlain]: treesize reduction 46, result has 70.1 percent of original size [2020-07-19 23:21:24,285 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:24,286 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:274, output treesize:92 [2020-07-19 23:21:24,420 INFO L384 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 79 treesize of output 59 [2020-07-19 23:21:24,421 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:24,435 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:24,438 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:24,438 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:106, output treesize:83 [2020-07-19 23:21:24,504 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:24,505 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 69 [2020-07-19 23:21:24,506 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-19 23:21:24,507 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-19 23:21:24,507 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-19 23:21:24,508 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-19 23:21:24,509 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-19 23:21:24,510 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-19 23:21:24,510 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-19 23:21:24,511 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:24,536 INFO L624 ElimStorePlain]: treesize reduction 77, result has 14.4 percent of original size [2020-07-19 23:21:24,537 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:24,537 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:87, output treesize:4 [2020-07-19 23:21:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:24,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:21:24,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2020-07-19 23:21:24,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932125534] [2020-07-19 23:21:24,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:21:24,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:21:24,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:21:24,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:21:24,544 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 16 states. [2020-07-19 23:21:25,173 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-07-19 23:21:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:21:26,201 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2020-07-19 23:21:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:21:26,202 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-07-19 23:21:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:21:26,203 INFO L225 Difference]: With dead ends: 121 [2020-07-19 23:21:26,204 INFO L226 Difference]: Without dead ends: 119 [2020-07-19 23:21:26,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:21:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-07-19 23:21:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 49. [2020-07-19 23:21:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 23:21:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-07-19 23:21:26,214 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 24 [2020-07-19 23:21:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:21:26,215 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-07-19 23:21:26,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:21:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-07-19 23:21:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 23:21:26,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:21:26,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:21:26,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:21:26,424 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:21:26,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:21:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2050422112, now seen corresponding path program 1 times [2020-07-19 23:21:26,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:21:26,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106613738] [2020-07-19 23:21:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@626b7975 [2020-07-19 23:21:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:21:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:26,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106613738] [2020-07-19 23:21:26,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851331352] [2020-07-19 23:21:26,645 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c68b84d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:21:26,827 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c68b84d issued 3 check-sat command(s) [2020-07-19 23:21:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:21:26,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 23:21:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:21:26,852 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-19 23:21:26,852 INFO L384 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-07-19 23:21:26,853 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:26,860 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:26,861 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-19 23:21:26,862 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:17 [2020-07-19 23:21:26,909 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:26,910 INFO L384 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 15 [2020-07-19 23:21:26,910 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:21:26,911 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:26,922 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:26,927 INFO L384 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 27 treesize of output 15 [2020-07-19 23:21:26,927 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:26,937 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:26,941 INFO L384 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 27 treesize of output 15 [2020-07-19 23:21:26,941 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:26,951 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:26,952 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:26,952 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:19 [2020-07-19 23:21:26,980 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_33|], 2=[|v_#memory_$Pointer$.offset_29|, |v_#memory_$Pointer$.base_29|]} [2020-07-19 23:21:26,984 INFO L384 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 25 treesize of output 17 [2020-07-19 23:21:26,984 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:26,993 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:26,999 INFO L384 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2020-07-19 23:21:27,000 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:27,008 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:27,028 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:27,029 INFO L384 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 65 treesize of output 97 [2020-07-19 23:21:27,030 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-07-19 23:21:27,030 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 23:21:27,031 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:27,041 INFO L624 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2020-07-19 23:21:27,041 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:27,041 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:112, output treesize:26 [2020-07-19 23:21:27,101 INFO L384 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 33 treesize of output 21 [2020-07-19 23:21:27,102 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:27,111 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:27,113 INFO L384 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 21 treesize of output 13 [2020-07-19 23:21:27,114 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:27,120 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:27,120 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:27,120 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:9 [2020-07-19 23:21:27,147 INFO L384 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 [2020-07-19 23:21:27,148 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:21:27,151 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:21:27,151 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:21:27,152 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-19 23:21:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:21:27,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:21:27,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-07-19 23:21:27,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428884435] [2020-07-19 23:21:27,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:21:27,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:21:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:21:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:21:27,178 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 19 states. [2020-07-19 23:21:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:21:27,924 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-07-19 23:21:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:21:27,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2020-07-19 23:21:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:21:27,927 INFO L225 Difference]: With dead ends: 85 [2020-07-19 23:21:27,928 INFO L226 Difference]: Without dead ends: 73 [2020-07-19 23:21:27,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:21:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-19 23:21:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2020-07-19 23:21:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-19 23:21:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-19 23:21:27,954 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 24 [2020-07-19 23:21:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:21:27,954 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-19 23:21:27,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:21:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-19 23:21:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:21:27,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:21:27,958 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:21:28,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:21:28,172 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:21:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:21:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1509760762, now seen corresponding path program 1 times [2020-07-19 23:21:28,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:21:28,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573019515] [2020-07-19 23:21:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@626b7975 [2020-07-19 23:21:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:21:28,205 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:21:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:21:28,233 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:21:28,276 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:21:28,276 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:21:28,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-19 23:21:28,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:21:28 BoogieIcfgContainer [2020-07-19 23:21:28,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:21:28,353 INFO L168 Benchmark]: Toolchain (without parser) took 17893.33 ms. Allocated memory was 145.8 MB in the beginning and 326.1 MB in the end (delta: 180.4 MB). Free memory was 102.1 MB in the beginning and 214.6 MB in the end (delta: -112.5 MB). Peak memory consumption was 67.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:21:28,353 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-19 23:21:28,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 633.15 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 101.7 MB in the beginning and 168.9 MB in the end (delta: -67.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:21:28,354 INFO L168 Benchmark]: Boogie Preprocessor took 58.12 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 166.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-19 23:21:28,355 INFO L168 Benchmark]: RCFGBuilder took 644.58 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 118.8 MB in the end (delta: 47.3 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:21:28,356 INFO L168 Benchmark]: TraceAbstraction took 16550.87 ms. Allocated memory was 202.4 MB in the beginning and 326.1 MB in the end (delta: 123.7 MB). Free memory was 118.2 MB in the beginning and 214.6 MB in the end (delta: -96.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:21:28,359 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 633.15 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 101.7 MB in the beginning and 168.9 MB in the end (delta: -67.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.12 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 166.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 644.58 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 118.8 MB in the end (delta: 47.3 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16550.87 ms. Allocated memory was 202.4 MB in the beginning and 326.1 MB in the end (delta: 123.7 MB). Free memory was 118.2 MB in the beginning and 214.6 MB in the end (delta: -96.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1039]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* null = malloc(sizeof(SLL)); [L995] null->colour = BLACK [L996] null->next = ((void*)0) [L998] SLL* list = malloc(sizeof(SLL)); [L999] list->next = null [L1000] list->colour = BLACK [L1002] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-2:0}] [L1005] COND TRUE __VERIFIER_nondet_int() [L1008] end->next = malloc(sizeof(SLL)) [L1009] EXPR end->next [L1009] end = end->next [L1010] end->next = null [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1018] end->colour = RED [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1022] end->colour = BLACK VAL [end={-4:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, null={-2:0}] [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, null={-2:0}] [L1030] COND FALSE !(!(null != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, null={-2:0}] [L1031] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, null={-2:0}] [L1031] COND FALSE !(!(BLACK == end->colour)) [L1033] COND TRUE null != end [L1035] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, null={-2:0}] [L1035] COND FALSE !(RED == end->colour) [L1042] EXPR end->next [L1042] end = end->next [L1033] COND TRUE null != end [L1035] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, null={-2:0}] [L1035] COND TRUE RED == end->colour [L1037] EXPR end->next [L1037] end = end->next [L1038] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, null={-2:0}] [L1039] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, null={-2:0}] [L1039] COND TRUE !(BLACK != end->colour) [L1039] __VERIFIER_error() VAL [end={-4:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, null={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.4s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 218 SDtfs, 433 SDslu, 997 SDs, 0 SdLazy, 1225 SolverSat, 164 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 7.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 187 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 145 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 252 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 213 ConstructedInterpolants, 19 QuantifiedInterpolants, 88800 SizeOfPredicates, 48 NumberOfNonLiveVariables, 399 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 1/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...