/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 [2020-07-21 13:40:27,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:40:27,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:40:27,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:40:27,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:40:27,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:40:27,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:40:27,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:40:27,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:40:27,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:40:27,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:40:27,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:40:27,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:40:27,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:40:27,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:40:27,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:40:27,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:40:27,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:40:27,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:40:27,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:40:27,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:40:27,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:40:27,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:40:27,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:40:27,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:40:27,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:40:27,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:40:27,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:40:27,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:40:27,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:40:27,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:40:27,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:40:27,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:40:27,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:40:27,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:40:27,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:40:27,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:40:27,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:40:27,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:40:27,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:40:27,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:40:27,604 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 [2020-07-21 13:40:27,644 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:40:27,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:40:27,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:40:27,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:40:27,651 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:40:27,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:40:27,651 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:40:27,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:40:27,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:40:27,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:40:27,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:40:27,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:40:27,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:40:27,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:40:27,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:40:27,653 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:40:27,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:40:27,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:40:27,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:40:27,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:40:27,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:40:27,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:40:27,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:40:27,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:40:27,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:40:27,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:40:27,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:27,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:40:27,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:40:27,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:40:27,988 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:40:28,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:40:28,006 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:40:28,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:40:28,008 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:40:28,009 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-07-21 13:40:28,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22abd32be/d14af9124f7d4fe99c6ee38ce6ddc2fb/FLAG7b8ae2f6e [2020-07-21 13:40:28,645 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:40:28,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-07-21 13:40:28,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22abd32be/d14af9124f7d4fe99c6ee38ce6ddc2fb/FLAG7b8ae2f6e [2020-07-21 13:40:28,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22abd32be/d14af9124f7d4fe99c6ee38ce6ddc2fb [2020-07-21 13:40:28,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:40:28,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:40:28,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:40:28,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:40:28,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:40:28,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:40:28" (1/1) ... [2020-07-21 13:40:28,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@977a087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:28, skipping insertion in model container [2020-07-21 13:40:28,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:40:28" (1/1) ... [2020-07-21 13:40:28,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:40:29,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:40:29,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:40:29,457 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:40:29,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:40:29,617 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:40:29,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29 WrapperNode [2020-07-21 13:40:29,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:40:29,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:40:29,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:40:29,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:40:29,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 13:40:29,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 13:40:29,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 13:40:29,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 13:40:29,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 13:40:29,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 13:40:29,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 13:40:29,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:40:29,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:40:29,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:40:29,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:40:29,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (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 [2020-07-21 13:40:29,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:40:29,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:40:29,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-21 13:40:29,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-07-21 13:40:29,768 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-07-21 13:40:29,768 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-07-21 13:40:29,768 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-07-21 13:40:29,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:40:29,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:40:29,770 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-21 13:40:29,771 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-07-21 13:40:29,771 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-07-21 13:40:29,771 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-07-21 13:40:29,771 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-07-21 13:40:29,771 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-07-21 13:40:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-07-21 13:40:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-07-21 13:40:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-07-21 13:40:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-07-21 13:40:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-07-21 13:40:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-07-21 13:40:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-07-21 13:40:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-07-21 13:40:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-07-21 13:40:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-07-21 13:40:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-07-21 13:40:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-07-21 13:40:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-07-21 13:40:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-07-21 13:40:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-07-21 13:40:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-07-21 13:40:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-07-21 13:40:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-07-21 13:40:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-07-21 13:40:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-07-21 13:40:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-07-21 13:40:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-07-21 13:40:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-07-21 13:40:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-21 13:40:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-07-21 13:40:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-07-21 13:40:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-07-21 13:40:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-07-21 13:40:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-07-21 13:40:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-07-21 13:40:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-07-21 13:40:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-07-21 13:40:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-07-21 13:40:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-07-21 13:40:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-07-21 13:40:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-07-21 13:40:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-07-21 13:40:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-07-21 13:40:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-07-21 13:40:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-07-21 13:40:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-07-21 13:40:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-07-21 13:40:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-07-21 13:40:29,782 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-07-21 13:40:29,783 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-07-21 13:40:29,783 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-07-21 13:40:29,783 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-07-21 13:40:29,783 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-07-21 13:40:29,783 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-07-21 13:40:29,783 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-21 13:40:29,784 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-07-21 13:40:29,784 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-07-21 13:40:29,784 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-07-21 13:40:29,784 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-07-21 13:40:29,784 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-07-21 13:40:29,784 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-07-21 13:40:29,784 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-07-21 13:40:29,785 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-07-21 13:40:29,785 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-07-21 13:40:29,786 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-07-21 13:40:29,786 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-07-21 13:40:29,786 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-07-21 13:40:29,787 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-07-21 13:40:29,787 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-07-21 13:40:29,788 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-07-21 13:40:29,788 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-07-21 13:40:29,788 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-07-21 13:40:29,788 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-07-21 13:40:29,788 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-07-21 13:40:29,788 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-07-21 13:40:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-07-21 13:40:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-07-21 13:40:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-07-21 13:40:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-07-21 13:40:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-07-21 13:40:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-07-21 13:40:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-07-21 13:40:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-07-21 13:40:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-07-21 13:40:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-07-21 13:40:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-07-21 13:40:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-07-21 13:40:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-07-21 13:40:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-07-21 13:40:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-07-21 13:40:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-07-21 13:40:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-07-21 13:40:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-07-21 13:40:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-07-21 13:40:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-07-21 13:40:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-07-21 13:40:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-07-21 13:40:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-07-21 13:40:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-07-21 13:40:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-07-21 13:40:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-07-21 13:40:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 13:40:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 13:40:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 13:40:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 13:40:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 13:40:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-07-21 13:40:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 13:40:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-07-21 13:40:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-07-21 13:40:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-07-21 13:40:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-07-21 13:40:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-07-21 13:40:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-07-21 13:40:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-07-21 13:40:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-07-21 13:40:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-07-21 13:40:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-07-21 13:40:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-07-21 13:40:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:40:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-07-21 13:40:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-07-21 13:40:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-07-21 13:40:29,803 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-07-21 13:40:29,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:40:29,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:40:29,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 13:40:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-21 13:40:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:40:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 13:40:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 13:40:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:40:30,412 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:40:30,413 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:40:30,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:40:30 BoogieIcfgContainer [2020-07-21 13:40:30,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:40:30,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:40:30,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:40:30,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:40:30,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:40:28" (1/3) ... [2020-07-21 13:40:30,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c59af5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:40:30, skipping insertion in model container [2020-07-21 13:40:30,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (2/3) ... [2020-07-21 13:40:30,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c59af5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:40:30, skipping insertion in model container [2020-07-21 13:40:30,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:40:30" (3/3) ... [2020-07-21 13:40:30,426 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-07-21 13:40:30,437 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:40:30,445 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:40:30,460 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:40:30,486 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:40:30,487 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:40:30,487 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:40:30,487 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:40:30,487 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:40:30,488 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:40:30,488 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:40:30,488 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:40:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-07-21 13:40:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 13:40:30,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:30,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:40:30,516 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-07-21 13:40:30,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:30,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011922157] [2020-07-21 13:40:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:30,767 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:40:30,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:30,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 13:40:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:40:30,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:40:30,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011922157] [2020-07-21 13:40:30,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:40:30,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 13:40:30,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882759737] [2020-07-21 13:40:30,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:40:30,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:30,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:40:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:40:30,910 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2020-07-21 13:40:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:31,035 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-07-21 13:40:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:40:31,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-21 13:40:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:31,049 INFO L225 Difference]: With dead ends: 86 [2020-07-21 13:40:31,050 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 13:40:31,058 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 [2020-07-21 13:40:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 13:40:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-21 13:40:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:40:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-07-21 13:40:31,106 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-07-21 13:40:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:31,107 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-07-21 13:40:31,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 13:40:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-21 13:40:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 13:40:31,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:31,110 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] [2020-07-21 13:40:31,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:31,325 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-07-21 13:40:31,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:31,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349104110] [2020-07-21 13:40:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:31,460 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:40:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 13:40:31,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 13:40:31,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:40:31,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349104110] [2020-07-21 13:40:31,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:40:31,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-21 13:40:31,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573649453] [2020-07-21 13:40:31,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:40:31,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:40:31,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:40:31,589 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 11 states. [2020-07-21 13:40:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:31,636 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-07-21 13:40:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:40:31,636 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-07-21 13:40:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:31,638 INFO L225 Difference]: With dead ends: 66 [2020-07-21 13:40:31,638 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 13:40:31,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:40:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 13:40:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-21 13:40:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:40:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-07-21 13:40:31,652 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-07-21 13:40:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:31,653 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-07-21 13:40:31,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:40:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-07-21 13:40:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 13:40:31,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:31,655 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] [2020-07-21 13:40:31,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:31,868 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-07-21 13:40:31,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:31,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474117189] [2020-07-21 13:40:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:32,031 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:40:32,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 13:40:32,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 13:40:32,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:40:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 13:40:32,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474117189] [2020-07-21 13:40:32,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:40:32,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 13:40:32,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059145216] [2020-07-21 13:40:32,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 13:40:32,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:32,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 13:40:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:40:32,270 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 7 states. [2020-07-21 13:40:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:32,295 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-07-21 13:40:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:40:32,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-21 13:40:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:32,297 INFO L225 Difference]: With dead ends: 67 [2020-07-21 13:40:32,297 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 13:40:32,298 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 [2020-07-21 13:40:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 13:40:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-21 13:40:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:40:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-21 13:40:32,306 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-07-21 13:40:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:32,307 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-21 13:40:32,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 13:40:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-21 13:40:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 13:40:32,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:32,308 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] [2020-07-21 13:40:32,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:32,524 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-07-21 13:40:32,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:32,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564450336] [2020-07-21 13:40:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:32,656 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:40:32,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 13:40:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 13:40:32,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:40:32,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564450336] [2020-07-21 13:40:32,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:40:32,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-21 13:40:32,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18909662] [2020-07-21 13:40:32,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:40:32,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:40:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:40:32,851 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 13 states. [2020-07-21 13:40:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:33,433 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-07-21 13:40:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 13:40:33,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-07-21 13:40:33,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:33,441 INFO L225 Difference]: With dead ends: 73 [2020-07-21 13:40:33,442 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 13:40:33,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:40:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 13:40:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-07-21 13:40:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 13:40:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-07-21 13:40:33,474 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 38 [2020-07-21 13:40:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:33,475 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-07-21 13:40:33,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:40:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-07-21 13:40:33,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 13:40:33,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:33,482 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] [2020-07-21 13:40:33,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:33,698 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:33,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-07-21 13:40:33,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:33,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486570102] [2020-07-21 13:40:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:33,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:40:33,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:33,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 13:40:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:40:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:40:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:40:34,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486570102] [2020-07-21 13:40:34,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:40:34,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2020-07-21 13:40:34,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207520985] [2020-07-21 13:40:34,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 13:40:34,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:34,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 13:40:34,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:40:34,713 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 22 states. [2020-07-21 13:40:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:35,527 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-07-21 13:40:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 13:40:35,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-07-21 13:40:35,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:35,532 INFO L225 Difference]: With dead ends: 73 [2020-07-21 13:40:35,532 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 13:40:35,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 13:40:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 13:40:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-07-21 13:40:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-21 13:40:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-07-21 13:40:35,554 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 45 [2020-07-21 13:40:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:35,557 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-07-21 13:40:35,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 13:40:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-07-21 13:40:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 13:40:35,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:35,559 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] [2020-07-21 13:40:35,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:35,760 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:35,760 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-07-21 13:40:35,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:35,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141152247] [2020-07-21 13:40:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:35,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:40:35,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 13:40:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:40:36,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:40:36,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:40:36,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:40:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:40:36,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141152247] [2020-07-21 13:40:36,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:40:36,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-07-21 13:40:36,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161017753] [2020-07-21 13:40:36,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 13:40:36,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:36,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 13:40:36,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 13:40:36,484 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 24 states. [2020-07-21 13:40:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:37,519 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-07-21 13:40:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 13:40:37,520 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-07-21 13:40:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:37,521 INFO L225 Difference]: With dead ends: 89 [2020-07-21 13:40:37,522 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 13:40:37,523 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 [2020-07-21 13:40:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 13:40:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-07-21 13:40:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 13:40:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-07-21 13:40:37,534 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 45 [2020-07-21 13:40:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:37,535 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-07-21 13:40:37,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 13:40:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-07-21 13:40:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 13:40:37,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:37,536 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] [2020-07-21 13:40:37,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:37,747 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-07-21 13:40:37,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:37,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199667198] [2020-07-21 13:40:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:37,893 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:40:37,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 13:40:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:40:38,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:40:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:40:38,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199667198] [2020-07-21 13:40:38,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:40:38,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2020-07-21 13:40:38,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326171350] [2020-07-21 13:40:38,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:40:38,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:38,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:40:38,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:40:38,690 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 23 states. [2020-07-21 13:40:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:39,766 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2020-07-21 13:40:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 13:40:39,766 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-07-21 13:40:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:39,768 INFO L225 Difference]: With dead ends: 73 [2020-07-21 13:40:39,768 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 13:40:39,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 78 SyntacticMatches, 17 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 13:40:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 13:40:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-07-21 13:40:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 13:40:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-07-21 13:40:39,780 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 57 [2020-07-21 13:40:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:39,781 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-07-21 13:40:39,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:40:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-07-21 13:40:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 13:40:39,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:39,783 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] [2020-07-21 13:40:39,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:39,997 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-07-21 13:40:39,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:39,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830600737] [2020-07-21 13:40:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:40,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:40:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:40,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-21 13:40:40,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 13:40:40,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:40:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 13:40:40,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830600737] [2020-07-21 13:40:40,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:40:40,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 13 [2020-07-21 13:40:40,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995011633] [2020-07-21 13:40:40,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:40:40,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:40,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:40:40,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:40:40,492 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 13 states. [2020-07-21 13:40:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:41,012 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-07-21 13:40:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 13:40:41,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-07-21 13:40:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:41,015 INFO L225 Difference]: With dead ends: 89 [2020-07-21 13:40:41,015 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 13:40:41,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:40:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 13:40:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-07-21 13:40:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 13:40:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-07-21 13:40:41,026 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 57 [2020-07-21 13:40:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:41,027 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-07-21 13:40:41,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:40:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-07-21 13:40:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 13:40:41,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:41,029 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] [2020-07-21 13:40:41,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:41,236 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:41,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:41,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-07-21 13:40:41,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:41,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009483667] [2020-07-21 13:40:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:41,344 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:40:41,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:41,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 13:40:41,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 13:40:41,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:40:41,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009483667] [2020-07-21 13:40:41,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:40:41,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 13:40:41,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149247391] [2020-07-21 13:40:41,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 13:40:41,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:41,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 13:40:41,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:40:41,426 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 7 states. [2020-07-21 13:40:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:41,570 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2020-07-21 13:40:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:40:41,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-07-21 13:40:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:41,573 INFO L225 Difference]: With dead ends: 91 [2020-07-21 13:40:41,573 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 13:40:41,574 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 [2020-07-21 13:40:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 13:40:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2020-07-21 13:40:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 13:40:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-07-21 13:40:41,584 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 57 [2020-07-21 13:40:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:41,585 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-07-21 13:40:41,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 13:40:41,585 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-07-21 13:40:41,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-21 13:40:41,586 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:41,587 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] [2020-07-21 13:40:41,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:41,800 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-07-21 13:40:41,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:41,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935511074] [2020-07-21 13:40:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:40:41,955 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:40:41,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:40:41,956 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:40:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:40:41,984 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:40:42,039 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:40:42,039 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:40:42,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:42,301 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 9 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-07-21 13:40:42,302 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 7 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-07-21 13:40:42,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:40:42 BoogieIcfgContainer [2020-07-21 13:40:42,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:40:42,342 INFO L168 Benchmark]: Toolchain (without parser) took 13387.04 ms. Allocated memory was 142.1 MB in the beginning and 351.3 MB in the end (delta: 209.2 MB). Free memory was 104.4 MB in the beginning and 291.0 MB in the end (delta: -186.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:40:42,343 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 13:40:42,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.97 ms. Allocated memory was 142.1 MB in the beginning and 205.0 MB in the end (delta: 62.9 MB). Free memory was 104.2 MB in the beginning and 169.7 MB in the end (delta: -65.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:40:42,344 INFO L168 Benchmark]: Boogie Preprocessor took 83.38 ms. Allocated memory is still 205.0 MB. Free memory was 169.7 MB in the beginning and 167.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:40:42,345 INFO L168 Benchmark]: RCFGBuilder took 714.91 ms. Allocated memory is still 205.0 MB. Free memory was 167.1 MB in the beginning and 121.6 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:40:42,346 INFO L168 Benchmark]: TraceAbstraction took 11920.01 ms. Allocated memory was 205.0 MB in the beginning and 351.3 MB in the end (delta: 146.3 MB). Free memory was 121.0 MB in the beginning and 291.0 MB in the end (delta: -170.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 13:40:42,350 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 661.97 ms. Allocated memory was 142.1 MB in the beginning and 205.0 MB in the end (delta: 62.9 MB). Free memory was 104.2 MB in the beginning and 169.7 MB in the end (delta: -65.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.38 ms. Allocated memory is still 205.0 MB. Free memory was 169.7 MB in the beginning and 167.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 714.91 ms. Allocated memory is still 205.0 MB. Free memory was 167.1 MB in the beginning and 121.6 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11920.01 ms. Allocated memory was 205.0 MB in the beginning and 351.3 MB in the end (delta: 146.3 MB). Free memory was 121.0 MB in the beginning and 291.0 MB in the end (delta: -170.0 MB). There was no memory consumed. 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)=12, \old(elem)=11, \old(guard_malloc_counter)=5, \old(guard_malloc_counter)=6, \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)=0, \old(guard_malloc_counter)=1, \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)=0, \old(guard_malloc_counter)=1, \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)=1, \old(guard_malloc_counter)=0, \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)=0, \old(elem)=2, \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)=2, \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}] [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)=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}, new={0:1}] [L890] (new!=elem) ? (0) : __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}, head={2:0}, head={2:0}, new={0:1}, new={0:1}] [L890] CALL __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}] [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: 11.7s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 375 SDtfs, 341 SDslu, 1475 SDs, 0 SdLazy, 3336 SolverSat, 372 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 689 GetRequests, 485 SyntacticMatches, 33 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred 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, 42 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 452 NumberOfCodeBlocks, 358 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 616 ConstructedInterpolants, 0 QuantifiedInterpolants, 96217 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1895 ConjunctsInSsa, 230 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 131/201 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...