/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_VARIABLES --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/ldv-regression/rule60_list2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:14:29,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:14:29,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:14:29,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:14:29,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:14:29,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:14:29,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:14:29,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:14:29,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:14:29,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:14:29,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:14:29,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:14:29,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:14:29,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:14:29,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:14:29,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:14:29,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:14:29,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:14:29,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:14:29,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:14:29,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:14:29,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:14:29,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:14:29,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:14:29,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:14:29,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:14:29,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:14:29,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:14:29,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:14:29,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:14:29,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:14:29,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:14:29,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:14:29,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:14:29,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:14:29,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:14:29,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:14:29,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:14:29,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:14:29,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:14:29,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:14:29,097 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 17:14:29,131 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:14:29,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:14:29,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:14:29,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:14:29,135 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:14:29,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:14:29,135 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:14:29,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:14:29,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:14:29,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:14:29,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:14:29,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:14:29,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:14:29,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:14:29,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:14:29,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:14:29,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:14:29,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:14:29,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:14:29,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:14:29,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:14:29,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:14:29,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:14:29,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:14:29,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:14:29,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:14:29,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:29,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:14:29,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:14:29,143 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_VARIABLES 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 17:14:29,423 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:14:29,447 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:14:29,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:14:29,453 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:14:29,453 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:14:29,455 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.i [2020-07-20 17:14:29,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cd49c66b/e1227e09cb604f50a7b45af8d4d85154/FLAG24185020b [2020-07-20 17:14:30,075 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:14:30,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.i [2020-07-20 17:14:30,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cd49c66b/e1227e09cb604f50a7b45af8d4d85154/FLAG24185020b [2020-07-20 17:14:30,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cd49c66b/e1227e09cb604f50a7b45af8d4d85154 [2020-07-20 17:14:30,454 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:14:30,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:14:30,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:14:30,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:14:30,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:14:30,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:14:30" (1/1) ... [2020-07-20 17:14:30,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@458b7631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:30, skipping insertion in model container [2020-07-20 17:14:30,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:14:30" (1/1) ... [2020-07-20 17:14:30,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:14:30,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:14:31,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:14:31,069 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:14:31,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:14:31,190 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:14:31,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31 WrapperNode [2020-07-20 17:14:31,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:14:31,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:14:31,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:14:31,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:14:31,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31" (1/1) ... [2020-07-20 17:14:31,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31" (1/1) ... [2020-07-20 17:14:31,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31" (1/1) ... [2020-07-20 17:14:31,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31" (1/1) ... [2020-07-20 17:14:31,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31" (1/1) ... [2020-07-20 17:14:31,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31" (1/1) ... [2020-07-20 17:14:31,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31" (1/1) ... [2020-07-20 17:14:31,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:14:31,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:14:31,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:14:31,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:14:31,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31" (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 17:14:31,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:14:31,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:14:31,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-20 17:14:31,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-07-20 17:14:31,372 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-07-20 17:14:31,372 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-07-20 17:14:31,373 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-07-20 17:14:31,373 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:14:31,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:14:31,373 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-20 17:14:31,374 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-07-20 17:14:31,374 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-07-20 17:14:31,374 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-07-20 17:14:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-07-20 17:14:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-07-20 17:14:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-07-20 17:14:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-07-20 17:14:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-07-20 17:14:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-07-20 17:14:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-07-20 17:14:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-07-20 17:14:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-07-20 17:14:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-07-20 17:14:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-07-20 17:14:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-07-20 17:14:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-07-20 17:14:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-07-20 17:14:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-07-20 17:14:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-07-20 17:14:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-07-20 17:14:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-07-20 17:14:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-07-20 17:14:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-07-20 17:14:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-07-20 17:14:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-07-20 17:14:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-07-20 17:14:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-07-20 17:14:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-07-20 17:14:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 17:14:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-07-20 17:14:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-07-20 17:14:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-07-20 17:14:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-07-20 17:14:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-07-20 17:14:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-07-20 17:14:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-07-20 17:14:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-07-20 17:14:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-07-20 17:14:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-07-20 17:14:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-07-20 17:14:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-07-20 17:14:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-07-20 17:14:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-07-20 17:14:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-07-20 17:14:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-07-20 17:14:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-07-20 17:14:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-07-20 17:14:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-07-20 17:14:31,383 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-07-20 17:14:31,383 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-07-20 17:14:31,383 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-07-20 17:14:31,383 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-07-20 17:14:31,383 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-07-20 17:14:31,383 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-07-20 17:14:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-20 17:14:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-07-20 17:14:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-07-20 17:14:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-07-20 17:14:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-07-20 17:14:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-07-20 17:14:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-07-20 17:14:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-07-20 17:14:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-07-20 17:14:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-07-20 17:14:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-07-20 17:14:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-07-20 17:14:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-07-20 17:14:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-07-20 17:14:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-07-20 17:14:31,386 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-07-20 17:14:31,386 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-07-20 17:14:31,386 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-07-20 17:14:31,386 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-07-20 17:14:31,386 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-07-20 17:14:31,386 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-07-20 17:14:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-07-20 17:14:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-07-20 17:14:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-07-20 17:14:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-07-20 17:14:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-07-20 17:14:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-07-20 17:14:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-07-20 17:14:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-07-20 17:14:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:14:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:14:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:14:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:14:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:14:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-07-20 17:14:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:14:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-07-20 17:14:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-07-20 17:14:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-07-20 17:14:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-07-20 17:14:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-07-20 17:14:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-07-20 17:14:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-07-20 17:14:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-07-20 17:14:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-07-20 17:14:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-07-20 17:14:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-07-20 17:14:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:14:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-07-20 17:14:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-07-20 17:14:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-07-20 17:14:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-07-20 17:14:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:14:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:14:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:14:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 17:14:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:14:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:14:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:14:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:14:32,042 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:14:32,042 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:14:32,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:14:32 BoogieIcfgContainer [2020-07-20 17:14:32,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:14:32,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:14:32,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:14:32,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:14:32,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:14:30" (1/3) ... [2020-07-20 17:14:32,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c02c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:14:32, skipping insertion in model container [2020-07-20 17:14:32,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:31" (2/3) ... [2020-07-20 17:14:32,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c02c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:14:32, skipping insertion in model container [2020-07-20 17:14:32,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:14:32" (3/3) ... [2020-07-20 17:14:32,062 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.i [2020-07-20 17:14:32,074 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:14:32,083 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:14:32,098 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:14:32,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:14:32,124 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:14:32,124 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:14:32,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:14:32,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:14:32,124 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:14:32,124 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:14:32,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:14:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-20 17:14:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:14:32,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:32,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:32,159 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:32,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1135050545, now seen corresponding path program 1 times [2020-07-20 17:14:32,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:32,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907966948] [2020-07-20 17:14:32,174 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 17:14:32,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:14:32,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:14:32,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:32,510 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 17:14:32,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:32,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907966948] [2020-07-20 17:14:32,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:32,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:14:32,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864644795] [2020-07-20 17:14:32,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:14:32,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:32,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:14:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:14:32,544 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 6 states. [2020-07-20 17:14:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:32,660 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-07-20 17:14:32,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:14:32,663 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-20 17:14:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:32,676 INFO L225 Difference]: With dead ends: 84 [2020-07-20 17:14:32,676 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 17:14:32,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:14:32,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 17:14:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 17:14:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 17:14:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-07-20 17:14:32,745 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 13 [2020-07-20 17:14:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:32,746 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-07-20 17:14:32,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:14:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-07-20 17:14:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 17:14:32,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:32,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:32,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:32,964 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:32,965 INFO L82 PathProgramCache]: Analyzing trace with hash -925661111, now seen corresponding path program 1 times [2020-07-20 17:14:32,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:32,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386409511] [2020-07-20 17:14:32,966 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 [2020-07-20 17:14:33,110 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:33,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 17:14:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 17:14:33,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 17:14:33,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386409511] [2020-07-20 17:14:33,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:14:33,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 17:14:33,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571839866] [2020-07-20 17:14:33,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:14:33,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:33,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:14:33,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:33,370 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 7 states. [2020-07-20 17:14:33,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:33,398 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-07-20 17:14:33,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:14:33,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-20 17:14:33,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:33,402 INFO L225 Difference]: With dead ends: 65 [2020-07-20 17:14:33,403 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 17:14:33,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 17:14:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 17:14:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 17:14:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-07-20 17:14:33,416 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 38 [2020-07-20 17:14:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:33,417 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-07-20 17:14:33,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:14:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-07-20 17:14:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 17:14:33,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:33,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:33,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:33,633 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:33,637 INFO L82 PathProgramCache]: Analyzing trace with hash -894641304, now seen corresponding path program 1 times [2020-07-20 17:14:33,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:33,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222725125] [2020-07-20 17:14:33,638 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:33,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:33,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:33,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 17:14:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 17:14:33,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:33,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222725125] [2020-07-20 17:14:33,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:33,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:14:33,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945647921] [2020-07-20 17:14:33,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:14:33,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:33,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:14:33,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:33,876 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 7 states. [2020-07-20 17:14:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:33,903 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-07-20 17:14:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:14:33,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-20 17:14:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:33,905 INFO L225 Difference]: With dead ends: 63 [2020-07-20 17:14:33,906 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 17:14:33,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 17:14:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 17:14:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 17:14:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-20 17:14:33,915 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 38 [2020-07-20 17:14:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:33,915 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-20 17:14:33,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:14:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-20 17:14:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 17:14:33,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:33,917 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:34,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:34,131 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1188044311, now seen corresponding path program 1 times [2020-07-20 17:14:34,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:34,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512275529] [2020-07-20 17:14:34,134 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:34,296 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:14:34,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:34,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 17:14:34,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 17:14:34,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:34,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512275529] [2020-07-20 17:14:34,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:34,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:14:34,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138489683] [2020-07-20 17:14:34,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:14:34,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:34,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:14:34,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:14:34,424 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 6 states. [2020-07-20 17:14:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:34,612 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-07-20 17:14:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:14:34,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-20 17:14:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:34,617 INFO L225 Difference]: With dead ends: 65 [2020-07-20 17:14:34,619 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 17:14:34,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 17:14:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-07-20 17:14:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 17:14:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-07-20 17:14:34,644 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 38 [2020-07-20 17:14:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:34,645 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-07-20 17:14:34,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:14:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-07-20 17:14:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 17:14:34,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:34,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:34,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:34,865 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1335597358, now seen corresponding path program 1 times [2020-07-20 17:14:34,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:34,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958342893] [2020-07-20 17:14:34,868 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:34,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:14:34,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 17:14:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:14:35,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:14:35,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958342893] [2020-07-20 17:14:35,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:14:35,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2020-07-20 17:14:35,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648998301] [2020-07-20 17:14:35,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 17:14:35,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:35,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 17:14:35,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-07-20 17:14:35,879 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 22 states. [2020-07-20 17:14:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:36,716 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-07-20 17:14:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 17:14:36,717 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-07-20 17:14:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:36,720 INFO L225 Difference]: With dead ends: 65 [2020-07-20 17:14:36,720 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 17:14:36,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 17:14:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 17:14:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-20 17:14:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 17:14:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-07-20 17:14:36,734 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 45 [2020-07-20 17:14:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:36,735 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-07-20 17:14:36,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 17:14:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-07-20 17:14:36,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 17:14:36,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:36,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:36,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:36,947 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:36,948 INFO L82 PathProgramCache]: Analyzing trace with hash 526250732, now seen corresponding path program 1 times [2020-07-20 17:14:36,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:36,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716618682] [2020-07-20 17:14:36,949 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:37,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:14:37,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:37,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 17:14:37,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:14:37,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:37,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:14:37,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:14:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:14:37,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716618682] [2020-07-20 17:14:37,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:14:37,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-07-20 17:14:37,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519465975] [2020-07-20 17:14:37,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 17:14:37,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:37,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 17:14:37,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-20 17:14:37,714 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 24 states. [2020-07-20 17:14:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:38,648 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-07-20 17:14:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 17:14:38,649 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-07-20 17:14:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:38,651 INFO L225 Difference]: With dead ends: 68 [2020-07-20 17:14:38,651 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 17:14:38,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 17:14:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 17:14:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-07-20 17:14:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 17:14:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-07-20 17:14:38,663 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 45 [2020-07-20 17:14:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:38,664 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-07-20 17:14:38,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 17:14:38,664 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-07-20 17:14:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 17:14:38,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:38,666 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:38,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:38,880 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:38,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2119488644, now seen corresponding path program 1 times [2020-07-20 17:14:38,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:38,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588232047] [2020-07-20 17:14:38,881 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:38,994 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:38,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:38,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-20 17:14:39,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 17:14:39,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 17:14:39,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588232047] [2020-07-20 17:14:39,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:14:39,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2020-07-20 17:14:39,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846143038] [2020-07-20 17:14:39,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 17:14:39,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:39,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 17:14:39,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-07-20 17:14:39,718 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 25 states. [2020-07-20 17:14:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:40,945 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-07-20 17:14:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 17:14:40,946 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-07-20 17:14:40,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:40,948 INFO L225 Difference]: With dead ends: 73 [2020-07-20 17:14:40,948 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 17:14:40,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 17:14:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 17:14:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-07-20 17:14:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 17:14:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-07-20 17:14:40,959 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 57 [2020-07-20 17:14:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:40,959 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-07-20 17:14:40,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 17:14:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-07-20 17:14:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 17:14:40,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:40,961 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:41,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:41,177 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:41,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1588672638, now seen corresponding path program 1 times [2020-07-20 17:14:41,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:41,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076900809] [2020-07-20 17:14:41,179 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:41,297 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:41,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:41,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 17:14:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 17:14:41,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:41,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076900809] [2020-07-20 17:14:41,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:41,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:14:41,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687669479] [2020-07-20 17:14:41,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:14:41,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:14:41,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:41,384 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 7 states. [2020-07-20 17:14:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:41,505 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 17:14:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:14:41,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-07-20 17:14:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:41,512 INFO L225 Difference]: With dead ends: 55 [2020-07-20 17:14:41,513 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 17:14:41,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:14:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 17:14:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-20 17:14:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 17:14:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-07-20 17:14:41,533 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 57 [2020-07-20 17:14:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:41,533 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-07-20 17:14:41,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:14:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-07-20 17:14:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 17:14:41,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:41,535 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:41,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:41,750 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:41,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:41,751 INFO L82 PathProgramCache]: Analyzing trace with hash 779326012, now seen corresponding path program 1 times [2020-07-20 17:14:41,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:41,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381163267] [2020-07-20 17:14:41,753 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:41,889 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:41,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:41,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 17:14:41,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 17:14:41,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 17:14:42,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381163267] [2020-07-20 17:14:42,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:14:42,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 17:14:42,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699554760] [2020-07-20 17:14:42,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 17:14:42,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 17:14:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:14:42,204 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 11 states. [2020-07-20 17:14:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:42,354 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-07-20 17:14:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:14:42,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-07-20 17:14:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:42,355 INFO L225 Difference]: With dead ends: 47 [2020-07-20 17:14:42,356 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:14:42,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 17:14:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:14:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:14:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:14:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:14:42,358 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-07-20 17:14:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:42,358 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:14:42,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 17:14:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:14:42,358 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:14:42,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:42,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:14:43,049 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 13 [2020-07-20 17:14:43,163 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-07-20 17:14:43,770 INFO L268 CegarLoopResult]: For program point my_mallocFINAL(lines 878 880) no Hoare annotation was computed. [2020-07-20 17:14:43,770 INFO L264 CegarLoopResult]: At program point L879(line 879) the Hoare annotation is: (let ((.cse0 (not (<= 8 |my_malloc_#in~size|)))) (and (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) .cse0 (not (= 0 ~elem~0.offset)) (not (= 0 ~elem~0.base))) (or .cse0 (<= 8 my_malloc_~size)))) [2020-07-20 17:14:43,771 INFO L268 CegarLoopResult]: For program point L879-1(line 879) no Hoare annotation was computed. [2020-07-20 17:14:43,771 INFO L264 CegarLoopResult]: At program point my_mallocENTRY(lines 878 880) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (not (<= 8 |my_malloc_#in~size|)) (not (= 0 ~elem~0.offset)) (not (= 0 ~elem~0.base))) [2020-07-20 17:14:43,771 INFO L268 CegarLoopResult]: For program point my_mallocEXIT(lines 878 880) no Hoare annotation was computed. [2020-07-20 17:14:43,771 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:14:43,771 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) [2020-07-20 17:14:43,771 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:14:43,771 INFO L268 CegarLoopResult]: For program point L896(lines 896 897) no Hoare annotation was computed. [2020-07-20 17:14:43,771 INFO L268 CegarLoopResult]: For program point L896-2(lines 895 898) no Hoare annotation was computed. [2020-07-20 17:14:43,772 INFO L268 CegarLoopResult]: For program point list_delEXIT(lines 895 898) no Hoare annotation was computed. [2020-07-20 17:14:43,772 INFO L264 CegarLoopResult]: At program point list_delENTRY(lines 895 898) the Hoare annotation is: (and (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) [2020-07-20 17:14:43,772 INFO L264 CegarLoopResult]: At program point list_addENTRY(lines 889 893) the Hoare annotation is: (or (and (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) (and (= |old(~elem~0.offset)| |list_add_#in~new.offset|) (= |old(~elem~0.base)| |list_add_#in~new.base|))) [2020-07-20 17:14:43,772 INFO L268 CegarLoopResult]: For program point L891(lines 891 892) no Hoare annotation was computed. [2020-07-20 17:14:43,772 INFO L268 CegarLoopResult]: For program point L890(line 890) no Hoare annotation was computed. [2020-07-20 17:14:43,772 INFO L268 CegarLoopResult]: For program point L891-2(lines 889 893) no Hoare annotation was computed. [2020-07-20 17:14:43,772 INFO L264 CegarLoopResult]: At program point L890-2(line 890) the Hoare annotation is: (and (= |old(~elem~0.offset)| |list_add_#in~new.offset|) (= |old(~elem~0.base)| |list_add_#in~new.base|)) [2020-07-20 17:14:43,772 INFO L268 CegarLoopResult]: For program point L890-3(line 890) no Hoare annotation was computed. [2020-07-20 17:14:43,772 INFO L268 CegarLoopResult]: For program point list_addEXIT(lines 889 893) no Hoare annotation was computed. [2020-07-20 17:14:43,773 INFO L268 CegarLoopResult]: For program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-20 17:14:43,773 INFO L268 CegarLoopResult]: For program point __blast_assertEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 17:14:43,773 INFO L268 CegarLoopResult]: For program point __blast_assertFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 17:14:43,773 INFO L271 CegarLoopResult]: At program point __blast_assertENTRY(lines 4 7) the Hoare annotation is: true [2020-07-20 17:14:43,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:14:43,773 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (= 0 ~elem~0.base) (= 0 ~elem~0.offset) (<= 0 ~guard_malloc_counter~0.offset)) [2020-07-20 17:14:43,773 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:14:43,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:14:43,773 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 902 917) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) (not (= |old(~elem~0.offset)| 0)) (not (= 0 |old(~elem~0.base)|))) [2020-07-20 17:14:43,774 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 902 917) no Hoare annotation was computed. [2020-07-20 17:14:43,774 INFO L264 CegarLoopResult]: At program point L909(line 909) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and (= 0 ~elem~0.base) (= 0 ~elem~0.offset) (or (not (= main_~dev2~0.base 0)) (not (= 0 main_~dev2~0.offset)))) (not (= |old(~elem~0.offset)| 0)) (and (or (not (= main_~dev2~0.base ~elem~0.base)) (not (= main_~dev2~0.offset ~elem~0.offset))) (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset) (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset) (<= (+ main_~dev1~0.offset 1) main_~dev2~0.offset) (or (not (= 0 main_~dev1~0.base)) (not (= 0 main_~dev1~0.offset)))) (not (= 0 |old(~elem~0.base)|))) [2020-07-20 17:14:43,774 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 902 917) no Hoare annotation was computed. [2020-07-20 17:14:43,774 INFO L264 CegarLoopResult]: At program point L908(line 908) the Hoare annotation is: (let ((.cse1 (= 0 ~elem~0.offset)) (.cse0 (= 0 ~elem~0.base))) (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and .cse0 .cse1 (or (not (= main_~dev2~0.base 0)) (not (= 0 main_~dev2~0.offset)))) (not (= |old(~elem~0.offset)| 0)) (and (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset) (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset) (<= (+ main_~dev1~0.offset 1) main_~dev2~0.offset) (or (not .cse1) (not .cse0)) (or (not (= 0 main_~dev1~0.base)) (not (= 0 main_~dev1~0.offset)))) (not (= 0 |old(~elem~0.base)|)))) [2020-07-20 17:14:43,774 INFO L264 CegarLoopResult]: At program point L907(line 907) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset) (<= 1 main_~dev1~0.offset) (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset) (= 0 ~elem~0.offset) (<= (+ main_~dev1~0.offset 1) main_~dev2~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) (not (= |old(~elem~0.offset)| 0)) (not (= 0 |old(~elem~0.base)|))) [2020-07-20 17:14:43,774 INFO L268 CegarLoopResult]: For program point L906(lines 906 915) no Hoare annotation was computed. [2020-07-20 17:14:43,775 INFO L264 CegarLoopResult]: At program point L907-1(line 907) the Hoare annotation is: (let ((.cse0 (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset)) (.cse1 (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset)) (.cse2 (<= (+ main_~dev1~0.offset 1) main_~dev2~0.offset))) (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and .cse0 (<= 1 main_~dev1~0.offset) .cse1 (= 0 ~elem~0.offset) .cse2 (= |old(~elem~0.base)| ~elem~0.base)) (and .cse0 (= main_~dev2~0.base ~elem~0.base) .cse1 .cse2 (or (not (= main_~dev2~0.base 0)) (not (= 0 main_~dev2~0.offset))) (= main_~dev2~0.offset ~elem~0.offset) (or (not (= 0 main_~dev1~0.base)) (not (= 0 main_~dev1~0.offset)))) (not (= |old(~elem~0.offset)| 0)) (not (= 0 |old(~elem~0.base)|)))) [2020-07-20 17:14:43,775 INFO L264 CegarLoopResult]: At program point L905(line 905) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and (= 0 main_~dev1~0.base) (= 0 main_~dev1~0.offset)) (not (= |old(~elem~0.offset)| 0)) (not (= 0 |old(~elem~0.base)|)) (and (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset) (<= 1 main_~dev1~0.offset) (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset) (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base))) [2020-07-20 17:14:43,775 INFO L268 CegarLoopResult]: For program point L906-1(lines 906 915) no Hoare annotation was computed. [2020-07-20 17:14:43,775 INFO L264 CegarLoopResult]: At program point L904(line 904) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) (not (= |old(~elem~0.offset)| 0)) (not (= 0 |old(~elem~0.base)|))) [2020-07-20 17:14:43,775 INFO L268 CegarLoopResult]: For program point L905-1(line 905) no Hoare annotation was computed. [2020-07-20 17:14:43,775 INFO L268 CegarLoopResult]: For program point L904-1(line 904) no Hoare annotation was computed. [2020-07-20 17:14:43,776 INFO L264 CegarLoopResult]: At program point __getMemoryENTRY(lines 869 876) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (not (= 0 ~elem~0.offset)) (not (= 0 ~elem~0.base)) (not (<= 8 |__getMemory_#in~size|))) [2020-07-20 17:14:43,776 INFO L268 CegarLoopResult]: For program point __getMemoryEXIT(lines 869 876) no Hoare annotation was computed. [2020-07-20 17:14:43,776 INFO L268 CegarLoopResult]: For program point __getMemoryFINAL(lines 869 876) no Hoare annotation was computed. [2020-07-20 17:14:43,776 INFO L268 CegarLoopResult]: For program point L873(lines 873 874) no Hoare annotation was computed. [2020-07-20 17:14:43,776 INFO L268 CegarLoopResult]: For program point L871(line 871) no Hoare annotation was computed. [2020-07-20 17:14:43,776 INFO L264 CegarLoopResult]: At program point L871-2(line 871) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (not (= 0 ~elem~0.offset)) (not (= 0 ~elem~0.base)) (not (<= 8 |__getMemory_#in~size|))) [2020-07-20 17:14:43,776 INFO L268 CegarLoopResult]: For program point L871-3(line 871) no Hoare annotation was computed. [2020-07-20 17:14:43,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:14:43 BoogieIcfgContainer [2020-07-20 17:14:43,783 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:14:43,788 INFO L168 Benchmark]: Toolchain (without parser) took 13329.21 ms. Allocated memory was 136.8 MB in the beginning and 342.4 MB in the end (delta: 205.5 MB). Free memory was 100.5 MB in the beginning and 129.6 MB in the end (delta: -29.0 MB). Peak memory consumption was 176.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:43,789 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:14:43,790 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.76 ms. Allocated memory was 136.8 MB in the beginning and 203.9 MB in the end (delta: 67.1 MB). Free memory was 100.1 MB in the beginning and 168.6 MB in the end (delta: -68.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:43,791 INFO L168 Benchmark]: Boogie Preprocessor took 88.04 ms. Allocated memory is still 203.9 MB. Free memory was 168.6 MB in the beginning and 165.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:43,791 INFO L168 Benchmark]: RCFGBuilder took 767.84 ms. Allocated memory is still 203.9 MB. Free memory was 165.2 MB in the beginning and 120.1 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:43,792 INFO L168 Benchmark]: TraceAbstraction took 11733.96 ms. Allocated memory was 203.9 MB in the beginning and 342.4 MB in the end (delta: 138.4 MB). Free memory was 119.4 MB in the beginning and 129.6 MB in the end (delta: -10.2 MB). Peak memory consumption was 128.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:43,796 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 732.76 ms. Allocated memory was 136.8 MB in the beginning and 203.9 MB in the end (delta: 67.1 MB). Free memory was 100.1 MB in the beginning and 168.6 MB in the end (delta: -68.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.04 ms. Allocated memory is still 203.9 MB. Free memory was 168.6 MB in the beginning and 165.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 767.84 ms. Allocated memory is still 203.9 MB. Free memory was 165.2 MB in the beginning and 120.1 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11733.96 ms. Allocated memory was 203.9 MB in the beginning and 342.4 MB in the end (delta: 138.4 MB). Free memory was 119.4 MB in the beginning and 129.6 MB in the end (delta: -10.2 MB). Peak memory consumption was 128.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.4s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 353 SDtfs, 274 SDslu, 1318 SDs, 0 SdLazy, 2250 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 673 GetRequests, 511 SyntacticMatches, 16 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=5, 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, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 72 PreInvPairs, 84 NumberOfFragments, 453 HoareAnnotationTreeSize, 72 FomulaSimplifications, 354 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 18 FomulaSimplificationsInter, 1154 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 388 NumberOfCodeBlocks, 253 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 616 ConstructedInterpolants, 0 QuantifiedInterpolants, 104513 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1720 ConjunctsInSsa, 255 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 140/201 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 correct! Received shutdown request...