/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:53:11,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:53:11,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:53:11,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:53:11,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:53:11,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:53:11,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:53:11,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:53:11,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:53:11,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:53:11,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:53:11,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:53:11,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:53:11,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:53:11,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:53:11,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:53:11,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:53:11,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:53:11,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:53:11,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:53:11,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:53:11,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:53:11,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:53:11,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:53:11,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:53:11,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:53:11,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:53:11,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:53:11,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:53:11,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:53:11,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:53:11,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:53:11,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:53:11,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:53:11,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:53:11,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:53:11,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:53:11,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:53:11,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:53:11,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:53:11,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:53:11,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:53:11,646 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:53:11,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:53:11,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:53:11,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:53:11,649 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:53:11,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:53:11,650 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:53:11,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:53:11,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:53:11,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:53:11,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:53:11,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:53:11,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:53:11,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:53:11,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:53:11,653 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:53:11,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:53:11,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:53:11,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:53:11,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:53:11,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:53:11,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:53:11,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:53:11,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:53:11,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:53:11,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:53:11,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:11,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:53:11,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:53:11,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:53:11,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:53:11,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:53:11,994 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:53:11,995 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:53:11,996 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:53:11,996 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-07-20 13:53:12,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55fb7e1b2/58568697195a4b08ba8bfaede7756666/FLAG4d7dd6580 [2020-07-20 13:53:12,611 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:53:12,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-07-20 13:53:12,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55fb7e1b2/58568697195a4b08ba8bfaede7756666/FLAG4d7dd6580 [2020-07-20 13:53:12,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55fb7e1b2/58568697195a4b08ba8bfaede7756666 [2020-07-20 13:53:12,946 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:53:12,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:53:12,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:53:12,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:53:12,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:53:12,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:53:12" (1/1) ... [2020-07-20 13:53:12,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0d5708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12, skipping insertion in model container [2020-07-20 13:53:12,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:53:12" (1/1) ... [2020-07-20 13:53:12,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:53:13,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:53:13,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:53:13,422 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:53:13,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:53:13,537 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:53:13,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13 WrapperNode [2020-07-20 13:53:13,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:53:13,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:53:13,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:53:13,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:53:13,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 13:53:13,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 13:53:13,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 13:53:13,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 13:53:13,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 13:53:13,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 13:53:13,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 13:53:13,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:53:13,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:53:13,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:53:13,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:53:13,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:53:13,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:53:13,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:53:13,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-20 13:53:13,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-07-20 13:53:13,680 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-07-20 13:53:13,680 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-07-20 13:53:13,680 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-07-20 13:53:13,681 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:53:13,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:53:13,681 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-20 13:53:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-07-20 13:53:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-07-20 13:53:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-07-20 13:53:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-07-20 13:53:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-07-20 13:53:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-07-20 13:53:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-07-20 13:53:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-07-20 13:53:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-07-20 13:53:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-07-20 13:53:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-07-20 13:53:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-07-20 13:53:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-07-20 13:53:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-07-20 13:53:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-07-20 13:53:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-07-20 13:53:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-07-20 13:53:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-07-20 13:53:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-07-20 13:53:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-07-20 13:53:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-07-20 13:53:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-07-20 13:53:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-07-20 13:53:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-07-20 13:53:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-07-20 13:53:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-07-20 13:53:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-07-20 13:53:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-07-20 13:53:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 13:53:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-07-20 13:53:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-07-20 13:53:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-07-20 13:53:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-07-20 13:53:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-07-20 13:53:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-07-20 13:53:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-07-20 13:53:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-07-20 13:53:13,690 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-07-20 13:53:13,690 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-07-20 13:53:13,690 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-07-20 13:53:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-07-20 13:53:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-07-20 13:53:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-07-20 13:53:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-07-20 13:53:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-07-20 13:53:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-07-20 13:53:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-07-20 13:53:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-07-20 13:53:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-07-20 13:53:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-07-20 13:53:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-07-20 13:53:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-07-20 13:53:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-07-20 13:53:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-07-20 13:53:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-20 13:53:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-07-20 13:53:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-07-20 13:53:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-07-20 13:53:13,694 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-07-20 13:53:13,694 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-07-20 13:53:13,694 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-07-20 13:53:13,694 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-07-20 13:53:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-07-20 13:53:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-07-20 13:53:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-07-20 13:53:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-07-20 13:53:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-07-20 13:53:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-07-20 13:53:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-07-20 13:53:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-07-20 13:53:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-07-20 13:53:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-07-20 13:53:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-07-20 13:53:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-07-20 13:53:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-07-20 13:53:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-07-20 13:53:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-07-20 13:53:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-07-20 13:53:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-07-20 13:53:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-07-20 13:53:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-07-20 13:53:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-07-20 13:53:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-07-20 13:53:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-07-20 13:53:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-07-20 13:53:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-07-20 13:53:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-07-20 13:53:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-07-20 13:53:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-07-20 13:53:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-07-20 13:53:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-07-20 13:53:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-07-20 13:53:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-07-20 13:53:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-07-20 13:53:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-07-20 13:53:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-07-20 13:53:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-07-20 13:53:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-07-20 13:53:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-07-20 13:53:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-07-20 13:53:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-07-20 13:53:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 13:53:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 13:53:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 13:53:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 13:53:13,703 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 13:53:13,703 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-07-20 13:53:13,703 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 13:53:13,704 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-07-20 13:53:13,704 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-07-20 13:53:13,704 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-07-20 13:53:13,704 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-07-20 13:53:13,705 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-07-20 13:53:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-07-20 13:53:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-07-20 13:53:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-07-20 13:53:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-07-20 13:53:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-07-20 13:53:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-07-20 13:53:13,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:53:13,707 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-07-20 13:53:13,707 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-07-20 13:53:13,708 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-07-20 13:53:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-07-20 13:53:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:53:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:53:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 13:53:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 13:53:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:53:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 13:53:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 13:53:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:53:14,269 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:53:14,270 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:53:14,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:53:14 BoogieIcfgContainer [2020-07-20 13:53:14,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:53:14,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:53:14,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:53:14,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:53:14,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:53:12" (1/3) ... [2020-07-20 13:53:14,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7657d2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:53:14, skipping insertion in model container [2020-07-20 13:53:14,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (2/3) ... [2020-07-20 13:53:14,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7657d2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:53:14, skipping insertion in model container [2020-07-20 13:53:14,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:53:14" (3/3) ... [2020-07-20 13:53:14,283 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-07-20 13:53:14,294 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:53:14,303 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:53:14,318 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:53:14,349 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:53:14,349 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:53:14,349 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:53:14,350 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:53:14,350 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:53:14,350 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:53:14,350 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:53:14,351 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:53:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-07-20 13:53:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:53:14,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:14,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:14,380 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-07-20 13:53:14,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:14,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409544626] [2020-07-20 13:53:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:14,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:53:14,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:14,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:53:14,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:53:14,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:53:14,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409544626] [2020-07-20 13:53:14,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:53:14,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:53:14,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999482311] [2020-07-20 13:53:14,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:53:14,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:14,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:53:14,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:53:14,697 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2020-07-20 13:53:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:14,784 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-07-20 13:53:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:53:14,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-20 13:53:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:14,798 INFO L225 Difference]: With dead ends: 86 [2020-07-20 13:53:14,798 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 13:53:14,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:53:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 13:53:14,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 13:53:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:53:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-07-20 13:53:14,850 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-07-20 13:53:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:14,851 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-07-20 13:53:14,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:53:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-20 13:53:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 13:53:14,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:14,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:15,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:15,068 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-07-20 13:53:15,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:15,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505450288] [2020-07-20 13:53:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:15,245 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:53:15,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:15,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 13:53:15,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:53:15,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:53:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:53:15,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505450288] [2020-07-20 13:53:15,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:53:15,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 11 [2020-07-20 13:53:15,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841972273] [2020-07-20 13:53:15,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:53:15,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:15,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:53:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:53:15,585 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 11 states. [2020-07-20 13:53:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:15,631 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-07-20 13:53:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:53:15,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-07-20 13:53:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:15,635 INFO L225 Difference]: With dead ends: 68 [2020-07-20 13:53:15,635 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 13:53:15,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:53:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 13:53:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 13:53:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 13:53:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-07-20 13:53:15,649 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-07-20 13:53:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:15,650 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-07-20 13:53:15,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:53:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-07-20 13:53:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 13:53:15,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:15,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:15,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:15,867 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1948890756, now seen corresponding path program 1 times [2020-07-20 13:53:15,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:15,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363123139] [2020-07-20 13:53:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:16,041 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:53:16,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:16,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 13:53:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:53:16,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:53:16,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363123139] [2020-07-20 13:53:16,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:53:16,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 13:53:16,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153567262] [2020-07-20 13:53:16,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:53:16,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:53:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:53:16,110 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 7 states. [2020-07-20 13:53:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:16,136 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-07-20 13:53:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:53:16,136 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-20 13:53:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:16,138 INFO L225 Difference]: With dead ends: 65 [2020-07-20 13:53:16,138 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 13:53:16,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:53:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 13:53:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 13:53:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:53:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-20 13:53:16,146 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-07-20 13:53:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:16,146 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-20 13:53:16,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:53:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-20 13:53:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 13:53:16,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:16,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:16,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:16,359 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:16,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-07-20 13:53:16,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:16,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405925593] [2020-07-20 13:53:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:16,474 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:53:16,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 13:53:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 13:53:16,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:53:16,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405925593] [2020-07-20 13:53:16,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:53:16,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:53:16,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953617911] [2020-07-20 13:53:16,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:53:16,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:16,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:53:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:53:16,547 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 6 states. [2020-07-20 13:53:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:16,678 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-07-20 13:53:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:53:16,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-20 13:53:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:16,681 INFO L225 Difference]: With dead ends: 68 [2020-07-20 13:53:16,681 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 13:53:16,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:53:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 13:53:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2020-07-20 13:53:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 13:53:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-20 13:53:16,695 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 38 [2020-07-20 13:53:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:16,695 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-20 13:53:16,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:53:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-20 13:53:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 13:53:16,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:16,697 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:16,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:16,912 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:16,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-07-20 13:53:16,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:16,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086699207] [2020-07-20 13:53:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:17,069 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:53:17,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 13:53:17,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:53:17,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:53:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:53:17,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086699207] [2020-07-20 13:53:17,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:53:17,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2020-07-20 13:53:17,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316499663] [2020-07-20 13:53:17,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:53:17,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:17,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:53:17,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:53:17,858 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 22 states. [2020-07-20 13:53:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:18,632 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-07-20 13:53:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 13:53:18,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-07-20 13:53:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:18,636 INFO L225 Difference]: With dead ends: 74 [2020-07-20 13:53:18,636 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 13:53:18,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 13:53:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 13:53:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-07-20 13:53:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 13:53:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-07-20 13:53:18,651 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 45 [2020-07-20 13:53:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:18,651 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-07-20 13:53:18,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:53:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-07-20 13:53:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 13:53:18,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:18,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:18,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:18,866 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:18,867 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-07-20 13:53:18,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:18,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660493546] [2020-07-20 13:53:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:18,979 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:53:18,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:18,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 13:53:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:53:19,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:53:19,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:53:19,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:53:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:53:19,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660493546] [2020-07-20 13:53:19,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:53:19,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-07-20 13:53:19,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840296565] [2020-07-20 13:53:19,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 13:53:19,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:19,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 13:53:19,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:53:19,579 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 24 states. [2020-07-20 13:53:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:20,613 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-07-20 13:53:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 13:53:20,614 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-07-20 13:53:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:20,615 INFO L225 Difference]: With dead ends: 89 [2020-07-20 13:53:20,616 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 13:53:20,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 13:53:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 13:53:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-07-20 13:53:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 13:53:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-07-20 13:53:20,642 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 45 [2020-07-20 13:53:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:20,642 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-07-20 13:53:20,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 13:53:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-07-20 13:53:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 13:53:20,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:20,644 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:20,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:20,855 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:20,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-07-20 13:53:20,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:20,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287721402] [2020-07-20 13:53:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:20,973 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:53:20,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-20 13:53:20,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 13:53:21,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:53:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 13:53:21,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287721402] [2020-07-20 13:53:21,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:53:21,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-07-20 13:53:21,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125614789] [2020-07-20 13:53:21,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:53:21,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:53:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:53:21,225 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 11 states. [2020-07-20 13:53:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:21,744 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2020-07-20 13:53:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:53:21,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-07-20 13:53:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:21,747 INFO L225 Difference]: With dead ends: 83 [2020-07-20 13:53:21,747 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 13:53:21,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:53:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 13:53:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-07-20 13:53:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 13:53:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-07-20 13:53:21,760 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 57 [2020-07-20 13:53:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:21,760 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-07-20 13:53:21,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:53:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-07-20 13:53:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 13:53:21,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:21,762 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:21,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:21,977 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:21,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-07-20 13:53:21,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:21,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748941787] [2020-07-20 13:53:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:22,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:53:22,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:22,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-20 13:53:22,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 13:53:22,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:53:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 13:53:22,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748941787] [2020-07-20 13:53:22,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:53:22,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 13 [2020-07-20 13:53:22,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730776818] [2020-07-20 13:53:22,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:53:22,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:22,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:53:22,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:53:22,393 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 13 states. [2020-07-20 13:53:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:22,874 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-07-20 13:53:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 13:53:22,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-07-20 13:53:22,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:22,877 INFO L225 Difference]: With dead ends: 88 [2020-07-20 13:53:22,877 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 13:53:22,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:53:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 13:53:22,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-07-20 13:53:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 13:53:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-07-20 13:53:22,889 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 57 [2020-07-20 13:53:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:22,889 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-07-20 13:53:22,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:53:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-07-20 13:53:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 13:53:22,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:22,891 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:23,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:23,107 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-07-20 13:53:23,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:23,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670023202] [2020-07-20 13:53:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:23,248 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:53:23,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:23,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 13:53:23,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 13:53:23,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:53:23,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670023202] [2020-07-20 13:53:23,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:53:23,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 13:53:23,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272328907] [2020-07-20 13:53:23,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:53:23,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:23,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:53:23,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:53:23,324 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 7 states. [2020-07-20 13:53:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:23,427 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2020-07-20 13:53:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:53:23,427 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-07-20 13:53:23,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:23,429 INFO L225 Difference]: With dead ends: 88 [2020-07-20 13:53:23,430 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 13:53:23,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:53:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 13:53:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-07-20 13:53:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 13:53:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-07-20 13:53:23,442 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 57 [2020-07-20 13:53:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:23,443 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-07-20 13:53:23,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:53:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-07-20 13:53:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 13:53:23,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:23,445 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:23,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:23,659 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash 251478393, now seen corresponding path program 1 times [2020-07-20 13:53:23,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:23,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643578901] [2020-07-20 13:53:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:23,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:53:23,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:53:23,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 13:53:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:53:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 13:53:23,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:53:23,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643578901] [2020-07-20 13:53:23,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:53:23,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 13:53:23,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659884003] [2020-07-20 13:53:23,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:53:23,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:53:23,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:53:23,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:53:23,828 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 7 states. [2020-07-20 13:53:23,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:53:23,950 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-07-20 13:53:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:53:23,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-07-20 13:53:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:53:23,955 INFO L225 Difference]: With dead ends: 87 [2020-07-20 13:53:23,956 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 13:53:23,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:53:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 13:53:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2020-07-20 13:53:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 13:53:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-07-20 13:53:23,968 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 57 [2020-07-20 13:53:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:53:23,968 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-07-20 13:53:23,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:53:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-07-20 13:53:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-20 13:53:23,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:53:23,970 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:53:24,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:24,186 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:53:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:53:24,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-07-20 13:53:24,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:53:24,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937559379] [2020-07-20 13:53:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:24,316 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:53:24,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:53:24,316 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:53:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:53:24,343 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:53:24,402 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:53:24,402 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:53:24,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:24,665 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 9 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-07-20 13:53:24,667 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 7 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-07-20 13:53:24,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:53:24 BoogieIcfgContainer [2020-07-20 13:53:24,712 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:53:24,715 INFO L168 Benchmark]: Toolchain (without parser) took 11766.11 ms. Allocated memory was 146.3 MB in the beginning and 331.9 MB in the end (delta: 185.6 MB). Free memory was 101.4 MB in the beginning and 106.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 180.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:24,716 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 13:53:24,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 584.61 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 101.0 MB in the beginning and 167.0 MB in the end (delta: -66.0 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:24,717 INFO L168 Benchmark]: Boogie Preprocessor took 56.75 ms. Allocated memory is still 202.4 MB. Free memory was 167.0 MB in the beginning and 164.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:24,718 INFO L168 Benchmark]: RCFGBuilder took 678.76 ms. Allocated memory is still 202.4 MB. Free memory was 164.3 MB in the beginning and 118.4 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:24,719 INFO L168 Benchmark]: TraceAbstraction took 10436.91 ms. Allocated memory was 202.4 MB in the beginning and 331.9 MB in the end (delta: 129.5 MB). Free memory was 117.8 MB in the beginning and 106.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 140.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:24,723 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 584.61 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 101.0 MB in the beginning and 167.0 MB in the end (delta: -66.0 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.75 ms. Allocated memory is still 202.4 MB. Free memory was 167.0 MB in the beginning and 164.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 678.76 ms. Allocated memory is still 202.4 MB. Free memory was 164.3 MB in the beginning and 118.4 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10436.91 ms. Allocated memory was 202.4 MB in the beginning and 331.9 MB in the end (delta: 129.5 MB). Free memory was 117.8 MB in the beginning and 106.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 140.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 9 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 7 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L867] void * guard_malloc_counter = 0; [L887] struct list_head *elem = ((void *)0); [L900] static struct list_head head; VAL [\old(elem)=12, \old(elem)=11, \old(guard_malloc_counter)=6, \old(guard_malloc_counter)=5, \old(head)=null, \old(head)=null, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}] [L903] struct list_head *dev1, *dev2; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}] [L904] CALL, EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}] [L879] CALL, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}] [L871] (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={2:0}, size=8] [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}, size=8] [L879] RET, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, __getMemory(size)={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}, size=8] [L879] return __getMemory(size); [L904] RET, EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}, my_malloc(sizeof(*dev1))={0:1}] [L904] dev1 = my_malloc(sizeof(*dev1)) [L905] CALL, EXPR my_malloc(sizeof(*dev2)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=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)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}] [L871] (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={2:0}, size=8] [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=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)=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}, 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)=1, \old(elem)=0, \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)=1, \old(elem)=0, \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)=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={0:2}] [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)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}] [L6] __VERIFIER_error() VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.2s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 442 SDtfs, 316 SDslu, 1482 SDs, 0 SdLazy, 2537 SolverSat, 273 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 728 GetRequests, 569 SyntacticMatches, 16 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=9, 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, 10 MinimizatonAttempts, 39 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 509 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 672 ConstructedInterpolants, 0 QuantifiedInterpolants, 105218 SizeOfPredicates, 81 NumberOfNonLiveVariables, 2010 ConjunctsInSsa, 290 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 148/222 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...