/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/bubble_sort-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:17:47,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:17:47,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:17:47,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:17:47,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:17:47,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:17:47,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:17:47,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:17:47,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:17:47,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:17:47,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:17:47,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:17:47,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:17:47,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:17:47,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:17:47,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:17:47,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:17:47,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:17:47,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:17:47,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:17:47,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:17:47,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:17:47,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:17:47,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:17:47,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 14:17:47,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 14:17:47,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 14:17:47,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 14:17:47,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 14:17:47,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 14:17:47,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 14:17:47,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 14:17:47,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 14:17:47,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 14:17:47,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 14:17:47,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 14:17:47,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 14:17:47,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 14:17:47,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:17:47,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:17:47,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:17:47,162 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 [2020-07-20 14:17:47,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:17:47,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:17:47,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:17:47,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:17:47,196 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:17:47,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:17:47,196 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:17:47,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:17:47,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:17:47,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:17:47,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:17:47,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:17:47,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:17:47,199 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:17:47,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:17:47,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:17:47,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:17:47,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:17:47,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:17:47,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:17:47,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:17:47,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:17:47,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:17:47,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:17:47,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:17:47,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:17:47,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:17:47,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:17:47,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:17:47,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC 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 [2020-07-20 14:17:47,478 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:17:47,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:17:47,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:17:47,499 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:17:47,499 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:17:47,500 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/bubble_sort-2.i [2020-07-20 14:17:47,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eed265cf/d4d4a01556b741768b0d25a4f0a10cbc/FLAGde1acaa85 [2020-07-20 14:17:48,115 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:17:48,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/bubble_sort-2.i [2020-07-20 14:17:48,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eed265cf/d4d4a01556b741768b0d25a4f0a10cbc/FLAGde1acaa85 [2020-07-20 14:17:48,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eed265cf/d4d4a01556b741768b0d25a4f0a10cbc [2020-07-20 14:17:48,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:17:48,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:17:48,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:17:48,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:17:48,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:17:48,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:17:48" (1/1) ... [2020-07-20 14:17:48,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75bc0f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:48, skipping insertion in model container [2020-07-20 14:17:48,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:17:48" (1/1) ... [2020-07-20 14:17:48,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:17:48,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:17:48,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:17:48,855 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:17:49,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:17:49,072 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:17:49,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49 WrapperNode [2020-07-20 14:17:49,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:17:49,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:17:49,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:17:49,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:17:49,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:17:49,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:17:49,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:17:49,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:17:49,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (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 [2020-07-20 14:17:49,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:17:49,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:17:49,233 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-20 14:17:49,234 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2020-07-20 14:17:49,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2020-07-20 14:17:49,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_del [2020-07-20 14:17:49,234 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-07-20 14:17:49,234 INFO L138 BoogieDeclarations]: Found implementation of procedure list_move [2020-07-20 14:17:49,234 INFO L138 BoogieDeclarations]: Found implementation of procedure gl_insert [2020-07-20 14:17:49,235 INFO L138 BoogieDeclarations]: Found implementation of procedure gl_read [2020-07-20 14:17:49,235 INFO L138 BoogieDeclarations]: Found implementation of procedure gl_destroy [2020-07-20 14:17:49,235 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2020-07-20 14:17:49,235 INFO L138 BoogieDeclarations]: Found implementation of procedure gl_sort_pass [2020-07-20 14:17:49,235 INFO L138 BoogieDeclarations]: Found implementation of procedure gl_sort [2020-07-20 14:17:49,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:17:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:17:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-07-20 14:17:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-07-20 14:17:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-07-20 14:17:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 14:17:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 14:17:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:17:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:17:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-20 14:17:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:17:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2020-07-20 14:17:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 14:17:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2020-07-20 14:17:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 14:17:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure __list_del [2020-07-20 14:17:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-07-20 14:17:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure list_move [2020-07-20 14:17:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure gl_insert [2020-07-20 14:17:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 14:17:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:17:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure gl_read [2020-07-20 14:17:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure gl_destroy [2020-07-20 14:17:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:17:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2020-07-20 14:17:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:17:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure gl_sort_pass [2020-07-20 14:17:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure gl_sort [2020-07-20 14:17:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:17:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:17:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 14:17:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 14:17:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:17:49,823 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint failFINAL: assume true; [2020-07-20 14:17:50,174 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:17:50,175 INFO L295 CfgBuilder]: Removed 23 assume(true) statements. [2020-07-20 14:17:50,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:17:50 BoogieIcfgContainer [2020-07-20 14:17:50,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:17:50,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:17:50,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:17:50,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:17:50,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:17:48" (1/3) ... [2020-07-20 14:17:50,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f48f311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:17:50, skipping insertion in model container [2020-07-20 14:17:50,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (2/3) ... [2020-07-20 14:17:50,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f48f311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:17:50, skipping insertion in model container [2020-07-20 14:17:50,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:17:50" (3/3) ... [2020-07-20 14:17:50,190 INFO L109 eAbstractionObserver]: Analyzing ICFG bubble_sort-2.i [2020-07-20 14:17:50,202 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:17:50,211 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:17:50,227 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:17:50,254 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:17:50,254 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:17:50,255 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:17:50,255 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:17:50,255 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:17:50,256 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:17:50,256 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:17:50,256 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:17:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states. [2020-07-20 14:17:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 14:17:50,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:17:50,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:17:50,291 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:17:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:17:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash 699938347, now seen corresponding path program 1 times [2020-07-20 14:17:50,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:17:50,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245253152] [2020-07-20 14:17:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:17:50,511 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 14:17:50,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:17:50,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:17:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:17:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:17:50,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:17:50,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245253152] [2020-07-20 14:17:50,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:17:50,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 14:17:50,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120638138] [2020-07-20 14:17:50,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:17:50,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:17:50,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:17:50,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:17:50,638 INFO L87 Difference]: Start difference. First operand 156 states. Second operand 7 states. [2020-07-20 14:17:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:17:50,942 INFO L93 Difference]: Finished difference Result 378 states and 581 transitions. [2020-07-20 14:17:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:17:50,944 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-20 14:17:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:17:50,956 INFO L225 Difference]: With dead ends: 378 [2020-07-20 14:17:50,956 INFO L226 Difference]: Without dead ends: 215 [2020-07-20 14:17:50,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-20 14:17:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-20 14:17:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 199. [2020-07-20 14:17:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-20 14:17:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2020-07-20 14:17:51,064 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 18 [2020-07-20 14:17:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:17:51,065 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2020-07-20 14:17:51,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:17:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2020-07-20 14:17:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 14:17:51,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:17:51,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:17:51,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:17:51,287 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:17:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:17:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash -755462125, now seen corresponding path program 1 times [2020-07-20 14:17:51,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:17:51,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099327928] [2020-07-20 14:17:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in