/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.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:14:24,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:14:24,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:14:24,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:14:24,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:14:24,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:14:24,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:14:24,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:14:24,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:14:24,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:14:24,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:14:24,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:14:24,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:14:24,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:14:24,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:14:24,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:14:24,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:14:24,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:14:24,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:14:24,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:14:24,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:14:24,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:14:24,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:14:24,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:14:24,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:14:24,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:14:24,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:14:24,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:14:24,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:14:24,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:14:24,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:14:24,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:14:24,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:14:24,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:14:24,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:14:24,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:14:24,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:14:24,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:14:24,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:14:24,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:14:24,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:14:24,347 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 17:14:24,363 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:14:24,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:14:24,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:14:24,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:14:24,364 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:14:24,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:14:24,365 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:14:24,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:14:24,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:14:24,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:14:24,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:14:24,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:14:24,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:14:24,366 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:14:24,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:14:24,367 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:14:24,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:14:24,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:14:24,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:14:24,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:14:24,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:14:24,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:14:24,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:14:24,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:14:24,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:14:24,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:14:24,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:24,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:14:24,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:14:24,370 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 17:14:24,653 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:14:24,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:14:24,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:14:24,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:14:24,672 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:14:24,673 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-07-20 17:14:24,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ebcab12/ad76df99d47945cc920043e2a9716c88/FLAG62cd7688b [2020-07-20 17:14:25,269 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:14:25,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-07-20 17:14:25,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ebcab12/ad76df99d47945cc920043e2a9716c88/FLAG62cd7688b [2020-07-20 17:14:25,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ebcab12/ad76df99d47945cc920043e2a9716c88 [2020-07-20 17:14:25,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:14:25,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:14:25,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:14:25,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:14:25,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:14:25,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4151b3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25, skipping insertion in model container [2020-07-20 17:14:25,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:14:25,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:14:26,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:14:26,097 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:14:26,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:14:26,257 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:14:26,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26 WrapperNode [2020-07-20 17:14:26,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:14:26,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:14:26,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:14:26,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:14:26,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26" (1/1) ... [2020-07-20 17:14:26,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26" (1/1) ... [2020-07-20 17:14:26,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26" (1/1) ... [2020-07-20 17:14:26,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26" (1/1) ... [2020-07-20 17:14:26,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26" (1/1) ... [2020-07-20 17:14:26,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26" (1/1) ... [2020-07-20 17:14:26,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26" (1/1) ... [2020-07-20 17:14:26,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:14:26,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:14:26,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:14:26,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:14:26,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26" (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 17:14:26,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:14:26,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:14:26,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-20 17:14:26,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-07-20 17:14:26,467 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-07-20 17:14:26,467 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-07-20 17:14:26,467 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-07-20 17:14:26,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:14:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:14:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-20 17:14:26,469 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-07-20 17:14:26,469 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-07-20 17:14:26,469 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-07-20 17:14:26,469 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-07-20 17:14:26,469 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-07-20 17:14:26,470 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-07-20 17:14:26,470 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-07-20 17:14:26,470 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-07-20 17:14:26,471 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-07-20 17:14:26,471 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-07-20 17:14:26,471 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-07-20 17:14:26,471 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-07-20 17:14:26,471 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-07-20 17:14:26,471 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-07-20 17:14:26,472 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-07-20 17:14:26,472 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-07-20 17:14:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-07-20 17:14:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-07-20 17:14:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-07-20 17:14:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-07-20 17:14:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-07-20 17:14:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-07-20 17:14:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-07-20 17:14:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-07-20 17:14:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-07-20 17:14:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-07-20 17:14:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-07-20 17:14:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-07-20 17:14:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 17:14:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-07-20 17:14:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-07-20 17:14:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-07-20 17:14:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-07-20 17:14:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-07-20 17:14:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-07-20 17:14:26,477 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-07-20 17:14:26,477 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-07-20 17:14:26,477 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-07-20 17:14:26,478 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-07-20 17:14:26,478 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-07-20 17:14:26,478 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-07-20 17:14:26,478 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-07-20 17:14:26,478 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-07-20 17:14:26,478 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-07-20 17:14:26,478 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-07-20 17:14:26,479 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-07-20 17:14:26,479 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-07-20 17:14:26,479 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-07-20 17:14:26,479 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-07-20 17:14:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-07-20 17:14:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-07-20 17:14:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-07-20 17:14:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-07-20 17:14:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-07-20 17:14:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-20 17:14:26,480 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-07-20 17:14:26,481 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-07-20 17:14:26,481 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-07-20 17:14:26,481 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-07-20 17:14:26,481 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-07-20 17:14:26,481 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-07-20 17:14:26,481 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-07-20 17:14:26,483 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-07-20 17:14:26,483 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-07-20 17:14:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-07-20 17:14:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-07-20 17:14:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-07-20 17:14:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-07-20 17:14:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-07-20 17:14:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-07-20 17:14:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-07-20 17:14:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-07-20 17:14:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-07-20 17:14:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-07-20 17:14:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-07-20 17:14:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-07-20 17:14:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-07-20 17:14:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-07-20 17:14:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-07-20 17:14:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-07-20 17:14:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-07-20 17:14:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-07-20 17:14:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-07-20 17:14:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-07-20 17:14:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-07-20 17:14:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-07-20 17:14:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-07-20 17:14:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-07-20 17:14:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-07-20 17:14:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-07-20 17:14:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-07-20 17:14:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-07-20 17:14:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-07-20 17:14:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-07-20 17:14:26,491 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-07-20 17:14:26,491 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-07-20 17:14:26,491 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-07-20 17:14:26,491 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-07-20 17:14:26,491 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-07-20 17:14:26,491 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-07-20 17:14:26,492 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-07-20 17:14:26,492 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:14:26,492 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:14:26,492 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:14:26,492 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:14:26,493 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:14:26,493 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-07-20 17:14:26,493 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:14:26,494 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-07-20 17:14:26,494 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-07-20 17:14:26,494 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-07-20 17:14:26,494 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-07-20 17:14:26,495 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-07-20 17:14:26,496 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-07-20 17:14:26,496 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-07-20 17:14:26,496 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-07-20 17:14:26,496 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-07-20 17:14:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-07-20 17:14:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-07-20 17:14:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:14:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-07-20 17:14:26,498 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-07-20 17:14:26,498 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-07-20 17:14:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-07-20 17:14:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:14:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:14:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:14:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 17:14:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:14:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:14:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:14:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:14:26,999 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:14:26,999 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:14:27,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:14:27 BoogieIcfgContainer [2020-07-20 17:14:27,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:14:27,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:14:27,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:14:27,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:14:27,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:14:25" (1/3) ... [2020-07-20 17:14:27,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc4d654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:14:27, skipping insertion in model container [2020-07-20 17:14:27,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:26" (2/3) ... [2020-07-20 17:14:27,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc4d654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:14:27, skipping insertion in model container [2020-07-20 17:14:27,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:14:27" (3/3) ... [2020-07-20 17:14:27,013 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-07-20 17:14:27,024 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:14:27,031 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:14:27,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:14:27,070 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:14:27,070 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:14:27,070 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:14:27,070 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:14:27,071 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:14:27,071 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:14:27,071 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:14:27,071 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:14:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-07-20 17:14:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:14:27,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:27,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:27,099 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-07-20 17:14:27,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:27,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560692853] [2020-07-20 17:14:27,116 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 17:14:27,333 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:14:27,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:14:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:27,421 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 17:14:27,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:27,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560692853] [2020-07-20 17:14:27,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:27,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:14:27,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884392794] [2020-07-20 17:14:27,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:14:27,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:14:27,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:14:27,448 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2020-07-20 17:14:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:27,541 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-07-20 17:14:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:14:27,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-20 17:14:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:27,553 INFO L225 Difference]: With dead ends: 86 [2020-07-20 17:14:27,554 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 17:14:27,558 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 17:14:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 17:14:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 17:14:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 17:14:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-07-20 17:14:27,607 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-07-20 17:14:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:27,607 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-07-20 17:14:27,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:14:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-20 17:14:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 17:14:27,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:27,610 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 17:14:27,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:27,825 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-07-20 17:14:27,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:27,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7244037] [2020-07-20 17:14:27,826 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 17:14:27,953 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:27,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:27,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 17:14:27,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:28,022 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 17:14:28,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:28,148 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 17:14:28,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7244037] [2020-07-20 17:14:28,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:14:28,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 17:14:28,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829244955] [2020-07-20 17:14:28,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:14:28,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:28,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:14:28,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:28,153 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 7 states. [2020-07-20 17:14:28,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:28,184 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-07-20 17:14:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:14:28,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-20 17:14:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:28,188 INFO L225 Difference]: With dead ends: 67 [2020-07-20 17:14:28,188 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 17:14:28,190 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 17:14:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 17:14:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 17:14:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 17:14:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-07-20 17:14:28,201 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-07-20 17:14:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:28,202 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-07-20 17:14:28,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:14:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-07-20 17:14:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 17:14:28,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:28,204 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 17:14:28,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:28,418 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1948890756, now seen corresponding path program 1 times [2020-07-20 17:14:28,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:28,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601549612] [2020-07-20 17:14:28,420 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 17:14:28,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:28,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:28,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 17:14:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:28,682 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 17:14:28,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:28,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601549612] [2020-07-20 17:14:28,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:28,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:14:28,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881942750] [2020-07-20 17:14:28,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:14:28,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:28,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:14:28,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:28,693 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 7 states. [2020-07-20 17:14:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:28,750 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-07-20 17:14:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:14:28,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-20 17:14:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:28,754 INFO L225 Difference]: With dead ends: 65 [2020-07-20 17:14:28,755 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 17:14:28,756 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 17:14:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 17:14:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 17:14:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 17:14:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-20 17:14:28,770 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-07-20 17:14:28,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:28,771 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-20 17:14:28,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:14:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-20 17:14:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 17:14:28,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:28,774 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 17:14:28,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:28,975 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:28,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-07-20 17:14:28,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:28,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146202922] [2020-07-20 17:14:28,976 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 17:14:29,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:14:29,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:29,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 17:14:29,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:29,177 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 17:14:29,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:29,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146202922] [2020-07-20 17:14:29,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:29,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:14:29,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307771504] [2020-07-20 17:14:29,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:14:29,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:29,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:14:29,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:14:29,180 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 6 states. [2020-07-20 17:14:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:29,333 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-07-20 17:14:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:14:29,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-20 17:14:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:29,337 INFO L225 Difference]: With dead ends: 68 [2020-07-20 17:14:29,337 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 17:14:29,338 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 17:14:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 17:14:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2020-07-20 17:14:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 17:14:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-20 17:14:29,351 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 38 [2020-07-20 17:14:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:29,352 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-20 17:14:29,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:14:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-20 17:14:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 17:14:29,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:29,353 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 17:14:29,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:29,564 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-07-20 17:14:29,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:29,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151916000] [2020-07-20 17:14:29,566 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 17:14:29,725 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:14:29,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 17:14:29,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:30,018 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 17:14:30,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:30,495 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 17:14:30,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151916000] [2020-07-20 17:14:30,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:14:30,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2020-07-20 17:14:30,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417293158] [2020-07-20 17:14:30,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 17:14:30,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:30,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 17:14:30,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-07-20 17:14:30,498 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 22 states. [2020-07-20 17:14:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:31,318 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-07-20 17:14:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 17:14:31,318 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-07-20 17:14:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:31,320 INFO L225 Difference]: With dead ends: 74 [2020-07-20 17:14:31,320 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 17:14:31,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 17:14:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 17:14:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-07-20 17:14:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 17:14:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-07-20 17:14:31,336 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 45 [2020-07-20 17:14:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:31,336 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-07-20 17:14:31,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 17:14:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-07-20 17:14:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 17:14:31,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:31,338 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 17:14:31,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:31,542 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-07-20 17:14:31,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:31,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995784082] [2020-07-20 17:14:31,544 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 17:14:31,655 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:14:31,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:31,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 17:14:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:31,850 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 17:14:31,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:32,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:14:32,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:14:32,232 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 17:14:32,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995784082] [2020-07-20 17:14:32,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:14:32,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-07-20 17:14:32,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604404866] [2020-07-20 17:14:32,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 17:14:32,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:32,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 17:14:32,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-20 17:14:32,240 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 24 states. [2020-07-20 17:14:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:33,395 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-07-20 17:14:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 17:14:33,396 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-07-20 17:14:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:33,397 INFO L225 Difference]: With dead ends: 89 [2020-07-20 17:14:33,398 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 17:14:33,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 17:14:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 17:14:33,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-07-20 17:14:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 17:14:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-07-20 17:14:33,409 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 45 [2020-07-20 17:14:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:33,410 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-07-20 17:14:33,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 17:14:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-07-20 17:14:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 17:14:33,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:33,411 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 17:14:33,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:33,626 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-07-20 17:14:33,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:33,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68159381] [2020-07-20 17:14:33,628 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 17:14:33,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:33,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-20 17:14:33,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 17:14:33,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:34,019 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 17:14:34,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68159381] [2020-07-20 17:14:34,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 17:14:34,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 13 [2020-07-20 17:14:34,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013391082] [2020-07-20 17:14:34,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:14:34,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:34,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:14:34,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:14:34,021 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 7 states. [2020-07-20 17:14:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:34,163 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-07-20 17:14:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:14:34,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-07-20 17:14:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:34,167 INFO L225 Difference]: With dead ends: 72 [2020-07-20 17:14:34,167 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 17:14:34,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-20 17:14:34,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 17:14:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-07-20 17:14:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 17:14:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-07-20 17:14:34,178 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 57 [2020-07-20 17:14:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:34,178 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-07-20 17:14:34,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:14:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-07-20 17:14:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 17:14:34,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:34,180 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 17:14:34,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:34,385 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-07-20 17:14:34,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:34,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381258802] [2020-07-20 17:14:34,387 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 17:14:34,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-20 17:14:34,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:34,717 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 17:14:34,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:14:35,172 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 17:14:35,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381258802] [2020-07-20 17:14:35,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:14:35,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2020-07-20 17:14:35,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213754471] [2020-07-20 17:14:35,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 17:14:35,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:35,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 17:14:35,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-07-20 17:14:35,175 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 25 states. [2020-07-20 17:14:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:36,693 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-07-20 17:14:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 17:14:36,693 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-07-20 17:14:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:36,696 INFO L225 Difference]: With dead ends: 104 [2020-07-20 17:14:36,696 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 17:14:36,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=2129, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 17:14:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 17:14:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-07-20 17:14:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-20 17:14:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-07-20 17:14:36,727 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 57 [2020-07-20 17:14:36,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:36,728 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-07-20 17:14:36,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 17:14:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-07-20 17:14:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 17:14:36,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:36,732 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 17:14:36,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:36,944 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:36,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-07-20 17:14:36,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:36,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106595091] [2020-07-20 17:14:36,946 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 17:14:37,058 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:14:37,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:37,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 17:14:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:37,124 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 17:14:37,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:37,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106595091] [2020-07-20 17:14:37,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:37,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:14:37,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437156731] [2020-07-20 17:14:37,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:14:37,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:14:37,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:37,126 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 7 states. [2020-07-20 17:14:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:37,272 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2020-07-20 17:14:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:14:37,273 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-07-20 17:14:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:37,274 INFO L225 Difference]: With dead ends: 102 [2020-07-20 17:14:37,274 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 17:14:37,275 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 17:14:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 17:14:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-07-20 17:14:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 17:14:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-07-20 17:14:37,287 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 57 [2020-07-20 17:14:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:37,287 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-07-20 17:14:37,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:14:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-07-20 17:14:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-20 17:14:37,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:37,289 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1] [2020-07-20 17:14:37,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:37,502 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:37,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-07-20 17:14:37,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:37,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899827507] [2020-07-20 17:14:37,503 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:37,635 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:14:37,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:14:37,635 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:14:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:14:37,663 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:14:37,755 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:14:37,755 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:14:37,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:38,013 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 9 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-07-20 17:14:38,015 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 7 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-07-20 17:14:38,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:14:38 BoogieIcfgContainer [2020-07-20 17:14:38,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:14:38,048 INFO L168 Benchmark]: Toolchain (without parser) took 12458.99 ms. Allocated memory was 142.6 MB in the beginning and 369.6 MB in the end (delta: 227.0 MB). Free memory was 99.0 MB in the beginning and 266.4 MB in the end (delta: -167.4 MB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:38,049 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 142.6 MB. Free memory is still 118.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:14:38,051 INFO L168 Benchmark]: CACSL2BoogieTranslator took 667.79 ms. Allocated memory was 142.6 MB in the beginning and 200.8 MB in the end (delta: 58.2 MB). Free memory was 98.5 MB in the beginning and 165.3 MB in the end (delta: -66.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:38,052 INFO L168 Benchmark]: Boogie Preprocessor took 113.45 ms. Allocated memory is still 200.8 MB. Free memory was 165.3 MB in the beginning and 162.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:38,053 INFO L168 Benchmark]: RCFGBuilder took 631.92 ms. Allocated memory is still 200.8 MB. Free memory was 162.2 MB in the beginning and 116.4 MB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:38,057 INFO L168 Benchmark]: TraceAbstraction took 11037.18 ms. Allocated memory was 200.8 MB in the beginning and 369.6 MB in the end (delta: 168.8 MB). Free memory was 116.4 MB in the beginning and 266.4 MB in the end (delta: -150.0 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:38,064 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 142.6 MB. Free memory is still 118.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 667.79 ms. Allocated memory was 142.6 MB in the beginning and 200.8 MB in the end (delta: 58.2 MB). Free memory was 98.5 MB in the beginning and 165.3 MB in the end (delta: -66.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.45 ms. Allocated memory is still 200.8 MB. Free memory was 165.3 MB in the beginning and 162.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 631.92 ms. Allocated memory is still 200.8 MB. Free memory was 162.2 MB in the beginning and 116.4 MB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11037.18 ms. Allocated memory was 200.8 MB in the beginning and 369.6 MB in the end (delta: 168.8 MB). Free memory was 116.4 MB in the beginning and 266.4 MB in the end (delta: -150.0 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 9 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 7 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L867] void * guard_malloc_counter = 0; [L887] struct list_head *elem = ((void *)0); [L900] static struct list_head head; VAL [\old(elem)=11, \old(elem)=12, \old(guard_malloc_counter)=6, \old(guard_malloc_counter)=5, \old(head)=null, \old(head)=null, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}] [L903] struct list_head *dev1, *dev2; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}] [L904] CALL, EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}] [L879] CALL, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}] [L871] (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}, size=8] [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}, size=8] [L879] RET, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, __getMemory(size)={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}, size=8] [L879] return __getMemory(size); [L904] RET, EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}, my_malloc(sizeof(*dev1))={0:1}] [L904] dev1 = my_malloc(sizeof(*dev1)) [L905] CALL, EXPR my_malloc(sizeof(*dev2)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}] [L879] CALL, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}] [L871] (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}, size=8] [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, \result={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={2:0}, size=8] [L879] RET, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, __getMemory(size)={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={2:0}, size=8] [L879] return __getMemory(size); [L905] RET, EXPR my_malloc(sizeof(*dev2)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, elem={0:0}, guard_malloc_counter={0:2}, head={2:0}, my_malloc(sizeof(*dev2))={0:2}] [L905] dev2 = my_malloc(sizeof(*dev2)) [L906] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={2:0}] [L907] CALL list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, new={0:2}] [L890] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, head={2:0}, new={0:2}, new={0:2}] [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, head={2:0}, new={0:2}, new={0:2}] [L907] RET list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={2:0}] [L908] CALL list_add(dev1, &head) VAL [\old(elem)=2, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, new={0:1}] [L890] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=2, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, head={2:0}, new={0:1}, new={0:1}] [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new VAL [\old(elem)=0, \old(elem)=2, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, head={2:0}, new={0:1}, new={0:1}] [L908] RET list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}] [L909] CALL list_del(dev2) VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, guard_malloc_counter={0:2}, head={2:0}] [L896] COND FALSE !(entry==elem) VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, entry={0:2}, guard_malloc_counter={0:2}, head={2:0}] [L909] RET list_del(dev2) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}] [L910] CALL list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, new={0:2}] [L890] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, head={2:0}, new={0:2}, new={0:2}] [L891] COND FALSE !(__VERIFIER_nondet_int()) [L910] RET list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}] [L913] CALL list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, new={0:1}] [L890] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}, head={2:0}, head={2:0}, new={0:1}, new={0:1}] [L890] CALL __blast_assert () VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}] [L6] __VERIFIER_error() VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.9s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 420 SDtfs, 326 SDslu, 1611 SDs, 0 SdLazy, 2766 SolverSat, 303 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 684 GetRequests, 513 SyntacticMatches, 16 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 47 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 452 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 616 ConstructedInterpolants, 0 QuantifiedInterpolants, 97345 SizeOfPredicates, 74 NumberOfNonLiveVariables, 1723 ConjunctsInSsa, 263 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 144/201 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 incorrect! Received shutdown request...