/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 BIGGEST_EQUIVALENCE_CLASS --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/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:44:29,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:44:29,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:44:29,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:44:29,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:44:29,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:44:29,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:44:29,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:44:29,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:44:29,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:44:29,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:44:29,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:44:29,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:44:29,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:44:29,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:44:29,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:44:29,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:44:29,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:44:29,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:44:29,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:44:29,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:44:29,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:44:29,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:44:29,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:44:29,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 22:44:29,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 22:44:29,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 22:44:29,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 22:44:29,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 22:44:29,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 22:44:29,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 22:44:29,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 22:44:29,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 22:44:29,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 22:44:29,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 22:44:29,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 22:44:29,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 22:44:29,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 22:44:29,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:44:29,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:44:29,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:44:29,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:44:29,714 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:44:29,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:44:29,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:44:29,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:44:29,718 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:44:29,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:44:29,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:44:29,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:44:29,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:44:29,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:44:29,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:44:29,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:44:29,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:44:29,720 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:44:29,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:44:29,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:44:29,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:44:29,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:44:29,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:44:29,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:44:29,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:44:29,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:44:29,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:44:29,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:44:29,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:44:29,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:44:29,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:29,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:44:29,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:44:29,725 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:44:30,162 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:44:30,189 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:44:30,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:44:30,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:44:30,200 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:44:30,204 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-21 22:44:30,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c986f7cc/fa864b7273dd4622b7f16bf8db09bdbe/FLAG168f79dd2 [2020-07-21 22:44:31,245 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:44:31,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-21 22:44:31,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c986f7cc/fa864b7273dd4622b7f16bf8db09bdbe/FLAG168f79dd2 [2020-07-21 22:44:31,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c986f7cc/fa864b7273dd4622b7f16bf8db09bdbe [2020-07-21 22:44:31,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:44:31,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:44:31,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:44:31,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:44:31,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:44:31,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:44:31" (1/1) ... [2020-07-21 22:44:31,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d81bd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:31, skipping insertion in model container [2020-07-21 22:44:31,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:44:31" (1/1) ... [2020-07-21 22:44:31,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:44:31,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:44:32,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:44:32,378 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:44:32,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:44:32,521 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:44:32,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32 WrapperNode [2020-07-21 22:44:32,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:44:32,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:44:32,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:44:32,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:44:32,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32" (1/1) ... [2020-07-21 22:44:32,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32" (1/1) ... [2020-07-21 22:44:32,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32" (1/1) ... [2020-07-21 22:44:32,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32" (1/1) ... [2020-07-21 22:44:32,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32" (1/1) ... [2020-07-21 22:44:32,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32" (1/1) ... [2020-07-21 22:44:32,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32" (1/1) ... [2020-07-21 22:44:32,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:44:32,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:44:32,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:44:32,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:44:32,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:44:32,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:44:32,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:44:32,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:44:32,741 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 22:44:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 22:44:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 22:44:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 22:44:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 22:44:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 22:44:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 22:44:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 22:44:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 22:44:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 22:44:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 22:44:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 22:44:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 22:44:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 22:44:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 22:44:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 22:44:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 22:44:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 22:44:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 22:44:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 22:44:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 22:44:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 22:44:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 22:44:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 22:44:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 22:44:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 22:44:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 22:44:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 22:44:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 22:44:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 22:44:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 22:44:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 22:44:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 22:44:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 22:44:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 22:44:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 22:44:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 22:44:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 22:44:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 22:44:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 22:44:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 22:44:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 22:44:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 22:44:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 22:44:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 22:44:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 22:44:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 22:44:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 22:44:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 22:44:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 22:44:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 22:44:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 22:44:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 22:44:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 22:44:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 22:44:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 22:44:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 22:44:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 22:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 22:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 22:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 22:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 22:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 22:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 22:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 22:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 22:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 22:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 22:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 22:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 22:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 22:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 22:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 22:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 22:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 22:44:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 22:44:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 22:44:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 22:44:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 22:44:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 22:44:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 22:44:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 22:44:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 22:44:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 22:44:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 22:44:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 22:44:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 22:44:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 22:44:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 22:44:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 22:44:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 22:44:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 22:44:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 22:44:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 22:44:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 22:44:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 22:44:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 22:44:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 22:44:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 22:44:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 22:44:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 22:44:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 22:44:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 22:44:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:44:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:44:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:44:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 22:44:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 22:44:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 22:44:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:44:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:44:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:44:33,802 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:44:33,803 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-21 22:44:33,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:44:33 BoogieIcfgContainer [2020-07-21 22:44:33,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:44:33,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:44:33,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:44:33,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:44:33,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:44:31" (1/3) ... [2020-07-21 22:44:33,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac092f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:44:33, skipping insertion in model container [2020-07-21 22:44:33,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:32" (2/3) ... [2020-07-21 22:44:33,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac092f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:44:33, skipping insertion in model container [2020-07-21 22:44:33,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:44:33" (3/3) ... [2020-07-21 22:44:33,838 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-07-21 22:44:33,857 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:44:33,876 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-21 22:44:33,908 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-21 22:44:33,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:44:33,978 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:44:33,984 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:44:33,984 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:44:33,984 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:44:33,984 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:44:33,985 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:44:33,985 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:44:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-07-21 22:44:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-21 22:44:34,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:34,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:34,083 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-07-21 22:44:34,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:34,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006876870] [2020-07-21 22:44:34,124 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 [2020-07-21 22:44:34,430 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:34,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:44:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:34,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:34,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006876870] [2020-07-21 22:44:34,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:34,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:44:34,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317142099] [2020-07-21 22:44:34,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:44:34,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:34,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:44:34,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:44:34,581 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 3 states. [2020-07-21 22:44:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:34,711 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-07-21 22:44:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:44:34,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-21 22:44:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:34,733 INFO L225 Difference]: With dead ends: 186 [2020-07-21 22:44:34,733 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 22:44:34,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:44:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 22:44:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-07-21 22:44:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 22:44:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-21 22:44:34,830 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-07-21 22:44:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:34,831 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-21 22:44:34,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:44:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-21 22:44:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:44:34,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:34,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:35,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:35,050 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:35,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:35,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-07-21 22:44:35,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:35,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36648090] [2020-07-21 22:44:35,053 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 [2020-07-21 22:44:35,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:44:35,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:35,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:44:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:35,429 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 22:44:35,430 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:35,461 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:35,468 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 22:44:35,470 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:35,481 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:35,483 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:35,484 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 22:44:35,545 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:35,550 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:35,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:35,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36648090] [2020-07-21 22:44:35,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:35,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:44:35,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034388825] [2020-07-21 22:44:35,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:44:35,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:35,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:44:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:44:35,606 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-07-21 22:44:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:35,969 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2020-07-21 22:44:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:44:35,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 22:44:35,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:35,981 INFO L225 Difference]: With dead ends: 205 [2020-07-21 22:44:35,981 INFO L226 Difference]: Without dead ends: 136 [2020-07-21 22:44:35,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-21 22:44:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 83. [2020-07-21 22:44:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-21 22:44:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2020-07-21 22:44:36,040 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 14 [2020-07-21 22:44:36,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:36,041 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2020-07-21 22:44:36,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:44:36,041 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2020-07-21 22:44:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:44:36,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:36,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:36,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:36,258 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:36,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-07-21 22:44:36,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:36,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456403095] [2020-07-21 22:44:36,261 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 [2020-07-21 22:44:36,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:36,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:36,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:44:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:36,413 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 22:44:36,414 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:36,430 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:36,438 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 22:44:36,439 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:36,447 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:36,448 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:36,449 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 22:44:36,469 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:36,472 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:36,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:36,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456403095] [2020-07-21 22:44:36,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:36,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:44:36,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351697925] [2020-07-21 22:44:36,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:44:36,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:36,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:44:36,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:44:36,494 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 4 states. [2020-07-21 22:44:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:36,692 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2020-07-21 22:44:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:44:36,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 22:44:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:36,695 INFO L225 Difference]: With dead ends: 137 [2020-07-21 22:44:36,696 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 22:44:36,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 22:44:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2020-07-21 22:44:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 22:44:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-07-21 22:44:36,712 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 14 [2020-07-21 22:44:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:36,713 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-07-21 22:44:36,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:44:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-07-21 22:44:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:44:36,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:36,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:36,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:36,932 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-07-21 22:44:36,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:36,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706099472] [2020-07-21 22:44:36,935 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 [2020-07-21 22:44:37,113 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:44:37,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:37,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:44:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:37,146 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 22:44:37,147 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:37,151 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:37,152 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:37,153 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 22:44:37,222 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:37,223 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 22:44:37,225 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:37,254 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:37,260 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_37|], 8=[|v_#memory_$Pointer$.base_37|]} [2020-07-21 22:44:37,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:37,271 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:37,291 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:37,318 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-21 22:44:37,319 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2020-07-21 22:44:37,320 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:37,340 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:37,344 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:44:37,346 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:186, output treesize:49 [2020-07-21 22:44:37,388 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 22:44:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:37,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:37,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706099472] [2020-07-21 22:44:37,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:37,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:44:37,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541526152] [2020-07-21 22:44:37,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:44:37,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:37,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:44:37,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:37,412 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 5 states. [2020-07-21 22:44:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:38,628 INFO L93 Difference]: Finished difference Result 220 states and 242 transitions. [2020-07-21 22:44:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:44:38,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:44:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:38,635 INFO L225 Difference]: With dead ends: 220 [2020-07-21 22:44:38,636 INFO L226 Difference]: Without dead ends: 151 [2020-07-21 22:44:38,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:44:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-21 22:44:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2020-07-21 22:44:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 22:44:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-07-21 22:44:38,654 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 14 [2020-07-21 22:44:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:38,654 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-07-21 22:44:38,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:44:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-07-21 22:44:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:44:38,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:38,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:38,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:38,871 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:38,872 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-07-21 22:44:38,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:38,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100187551] [2020-07-21 22:44:38,873 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 [2020-07-21 22:44:39,000 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:39,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:39,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:44:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:39,025 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 22:44:39,026 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:39,030 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:39,031 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:39,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 22:44:39,078 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:39,079 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 22:44:39,081 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:39,093 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:39,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:39,105 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:39,115 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:39,118 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:39,118 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:48, output treesize:4 [2020-07-21 22:44:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:39,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:39,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100187551] [2020-07-21 22:44:39,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:39,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:44:39,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328787287] [2020-07-21 22:44:39,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:44:39,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:39,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:44:39,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:39,131 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 5 states. [2020-07-21 22:44:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:39,365 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2020-07-21 22:44:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:44:39,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 22:44:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:39,370 INFO L225 Difference]: With dead ends: 126 [2020-07-21 22:44:39,370 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 22:44:39,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:44:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 22:44:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-07-21 22:44:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 22:44:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-07-21 22:44:39,391 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 19 [2020-07-21 22:44:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:39,397 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-07-21 22:44:39,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:44:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-07-21 22:44:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:44:39,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:39,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:39,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:39,600 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-07-21 22:44:39,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:39,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342104667] [2020-07-21 22:44:39,603 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 [2020-07-21 22:44:39,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:39,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:44:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:39,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:39,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342104667] [2020-07-21 22:44:39,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:39,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:44:39,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570715659] [2020-07-21 22:44:39,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:44:39,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:39,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:44:39,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:44:39,791 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 4 states. [2020-07-21 22:44:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:39,973 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2020-07-21 22:44:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:44:39,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-21 22:44:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:39,977 INFO L225 Difference]: With dead ends: 136 [2020-07-21 22:44:39,977 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 22:44:39,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 22:44:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-07-21 22:44:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 22:44:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-07-21 22:44:39,991 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 20 [2020-07-21 22:44:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:39,992 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-07-21 22:44:39,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:44:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-07-21 22:44:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:44:39,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:39,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:40,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:40,204 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:40,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:40,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-07-21 22:44:40,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:40,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141047268] [2020-07-21 22:44:40,206 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 [2020-07-21 22:44:40,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:40,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:44:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:40,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:40,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141047268] [2020-07-21 22:44:40,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:40,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:44:40,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814685902] [2020-07-21 22:44:40,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:44:40,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:40,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:44:40,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:44:40,353 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 3 states. [2020-07-21 22:44:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:40,373 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-07-21 22:44:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:44:40,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:44:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:40,377 INFO L225 Difference]: With dead ends: 102 [2020-07-21 22:44:40,377 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 22:44:40,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:44:40,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 22:44:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2020-07-21 22:44:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 22:44:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-07-21 22:44:40,390 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 24 [2020-07-21 22:44:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:40,391 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-07-21 22:44:40,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:44:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-07-21 22:44:40,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:44:40,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:40,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:40,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:40,604 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-07-21 22:44:40,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:40,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973316187] [2020-07-21 22:44:40,606 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 [2020-07-21 22:44:40,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:40,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:40,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:44:40,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:40,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:40,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973316187] [2020-07-21 22:44:40,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:40,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:44:40,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290740620] [2020-07-21 22:44:40,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:44:40,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:40,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:44:40,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:44:40,760 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 3 states. [2020-07-21 22:44:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:40,782 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2020-07-21 22:44:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:44:40,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 22:44:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:40,786 INFO L225 Difference]: With dead ends: 78 [2020-07-21 22:44:40,786 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 22:44:40,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:44:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 22:44:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-21 22:44:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 22:44:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-07-21 22:44:40,797 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 25 [2020-07-21 22:44:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:40,798 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-07-21 22:44:40,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:44:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-07-21 22:44:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:44:40,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:40,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:41,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:41,008 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:41,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-07-21 22:44:41,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:41,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985791680] [2020-07-21 22:44:41,010 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 [2020-07-21 22:44:41,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:41,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:44:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:41,193 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 22:44:41,194 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:41,208 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:41,216 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 22:44:41,217 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:41,227 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:41,228 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:41,232 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 22:44:41,256 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:41,259 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:41,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:41,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985791680] [2020-07-21 22:44:41,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:41,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:44:41,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947478956] [2020-07-21 22:44:41,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:44:41,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:44:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:44:41,291 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-07-21 22:44:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:41,485 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-07-21 22:44:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:44:41,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-21 22:44:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:41,488 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:44:41,490 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 22:44:41,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 22:44:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-07-21 22:44:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 22:44:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-07-21 22:44:41,501 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 27 [2020-07-21 22:44:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:41,502 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-07-21 22:44:41,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:44:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-07-21 22:44:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:44:41,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:41,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:41,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:41,720 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:41,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1630846939, now seen corresponding path program 1 times [2020-07-21 22:44:41,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:41,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553145857] [2020-07-21 22:44:41,723 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 [2020-07-21 22:44:41,910 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:41,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:41,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:44:41,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:41,959 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:41,968 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:41,970 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:41,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:41,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553145857] [2020-07-21 22:44:41,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:41,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:44:41,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761781551] [2020-07-21 22:44:41,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:44:41,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:41,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:44:41,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:44:41,994 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-07-21 22:44:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:42,156 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-07-21 22:44:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:44:42,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-21 22:44:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:42,158 INFO L225 Difference]: With dead ends: 80 [2020-07-21 22:44:42,158 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 22:44:42,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 22:44:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-07-21 22:44:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 22:44:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-07-21 22:44:42,169 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 27 [2020-07-21 22:44:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:42,169 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-07-21 22:44:42,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:44:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-07-21 22:44:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 22:44:42,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:42,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:42,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:42,388 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:42,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:42,388 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-07-21 22:44:42,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:42,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673724557] [2020-07-21 22:44:42,389 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 [2020-07-21 22:44:42,513 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:42,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:42,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:44:42,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:42,541 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 22:44:42,541 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:42,554 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:42,561 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 22:44:42,562 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:42,601 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:42,602 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:42,604 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-07-21 22:44:42,672 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 22:44:42,673 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:42,686 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:42,692 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 22:44:42,695 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:42,703 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:42,704 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:42,704 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-21 22:44:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:42,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:42,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673724557] [2020-07-21 22:44:42,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:42,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 22:44:42,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768864623] [2020-07-21 22:44:42,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:44:42,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:42,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:44:42,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:44:42,733 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 6 states. [2020-07-21 22:44:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:43,217 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2020-07-21 22:44:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:44:43,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-21 22:44:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:43,222 INFO L225 Difference]: With dead ends: 200 [2020-07-21 22:44:43,222 INFO L226 Difference]: Without dead ends: 159 [2020-07-21 22:44:43,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:44:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-21 22:44:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 96. [2020-07-21 22:44:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 22:44:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2020-07-21 22:44:43,242 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 28 [2020-07-21 22:44:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:43,247 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2020-07-21 22:44:43,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:44:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2020-07-21 22:44:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 22:44:43,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:43,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:43,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:43,461 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-07-21 22:44:43,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:43,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000405811] [2020-07-21 22:44:43,463 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:43,611 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:43,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:43,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 22:44:43,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:43,639 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 22:44:43,640 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:43,645 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:43,646 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:43,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 22:44:43,697 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:43,698 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 22:44:43,700 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:43,702 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:43,750 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:43,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:43,768 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 22:44:43,789 INFO L350 Elim1Store]: treesize reduction 87, result has 9.4 percent of original size [2020-07-21 22:44:43,790 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 193 [2020-07-21 22:44:43,791 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:43,822 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:43,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:43,835 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2020-07-21 22:44:43,837 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:43,863 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:43,865 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:43,866 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-21 22:44:44,040 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 22:44:44,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:44,073 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-21 22:44:44,074 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 55 [2020-07-21 22:44:44,078 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 22:44:44,082 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 22:44:44,085 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:44:44,127 INFO L624 ElimStorePlain]: treesize reduction 8, result has 84.0 percent of original size [2020-07-21 22:44:44,156 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:44,158 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 34 [2020-07-21 22:44:44,159 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:44,166 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:44,169 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:44,170 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:7 [2020-07-21 22:44:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:44,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:44,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000405811] [2020-07-21 22:44:44,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:44,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 22:44:44,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565918579] [2020-07-21 22:44:44,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 22:44:44,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:44,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 22:44:44,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:44:44,209 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand 7 states. [2020-07-21 22:44:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:45,500 INFO L93 Difference]: Finished difference Result 238 states and 265 transitions. [2020-07-21 22:44:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:44:45,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 22:44:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:45,504 INFO L225 Difference]: With dead ends: 238 [2020-07-21 22:44:45,504 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 22:44:45,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:44:45,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 22:44:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 108. [2020-07-21 22:44:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 22:44:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-07-21 22:44:45,520 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 28 [2020-07-21 22:44:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:45,520 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-07-21 22:44:45,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 22:44:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-07-21 22:44:45,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 22:44:45,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:45,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:45,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:45,739 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:45,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:45,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-07-21 22:44:45,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:45,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160615854] [2020-07-21 22:44:45,741 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:45,861 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:45,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:45,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:44:45,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:44:45,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:45,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160615854] [2020-07-21 22:44:45,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:45,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:44:45,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069730159] [2020-07-21 22:44:45,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:44:45,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:45,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:44:45,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:44:45,897 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 3 states. [2020-07-21 22:44:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:45,982 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-07-21 22:44:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:44:45,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 22:44:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:45,984 INFO L225 Difference]: With dead ends: 109 [2020-07-21 22:44:45,984 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 22:44:45,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:44:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 22:44:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-07-21 22:44:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 22:44:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2020-07-21 22:44:46,006 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 30 [2020-07-21 22:44:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:46,007 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2020-07-21 22:44:46,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:44:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2020-07-21 22:44:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 22:44:46,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:46,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:46,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:46,229 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:46,230 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-07-21 22:44:46,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:46,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261833563] [2020-07-21 22:44:46,231 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:46,354 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:46,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:44:46,355 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:44:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:44:46,380 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:44:46,424 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:44:46,424 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:44:46,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:46,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:44:46 BoogieIcfgContainer [2020-07-21 22:44:46,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:44:46,750 INFO L168 Benchmark]: Toolchain (without parser) took 15280.87 ms. Allocated memory was 142.1 MB in the beginning and 303.6 MB in the end (delta: 161.5 MB). Free memory was 98.6 MB in the beginning and 120.0 MB in the end (delta: -21.5 MB). Peak memory consumption was 140.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:44:46,751 INFO L168 Benchmark]: CDTParser took 1.50 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 22:44:46,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1049.75 ms. Allocated memory was 142.1 MB in the beginning and 200.8 MB in the end (delta: 58.7 MB). Free memory was 98.2 MB in the beginning and 168.0 MB in the end (delta: -69.8 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:44:46,752 INFO L168 Benchmark]: Boogie Preprocessor took 121.22 ms. Allocated memory is still 200.8 MB. Free memory was 168.0 MB in the beginning and 164.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:44:46,753 INFO L168 Benchmark]: RCFGBuilder took 1172.34 ms. Allocated memory is still 200.8 MB. Free memory was 164.3 MB in the beginning and 108.4 MB in the end (delta: 55.9 MB). Peak memory consumption was 55.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:44:46,753 INFO L168 Benchmark]: TraceAbstraction took 12923.77 ms. Allocated memory was 200.8 MB in the beginning and 303.6 MB in the end (delta: 102.8 MB). Free memory was 107.7 MB in the beginning and 120.0 MB in the end (delta: -12.4 MB). Peak memory consumption was 90.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:44:46,756 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.50 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1049.75 ms. Allocated memory was 142.1 MB in the beginning and 200.8 MB in the end (delta: 58.7 MB). Free memory was 98.2 MB in the beginning and 168.0 MB in the end (delta: -69.8 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.22 ms. Allocated memory is still 200.8 MB. Free memory was 168.0 MB in the beginning and 164.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1172.34 ms. Allocated memory is still 200.8 MB. Free memory was 164.3 MB in the beginning and 108.4 MB in the end (delta: 55.9 MB). Peak memory consumption was 55.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12923.77 ms. Allocated memory was 200.8 MB in the beginning and 303.6 MB in the end (delta: 102.8 MB). Free memory was 107.7 MB in the beginning and 120.0 MB in the end (delta: -12.4 MB). Peak memory consumption was 90.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}] [L995] COND FALSE !(!(list != ((void*)0))) VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}] [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={-2:0}, list->inner={-1:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1015] COND FALSE !(!(((void*)0) != end)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner VAL [end={-2:0}, inner={-1:0}, len=0, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1023] COND TRUE len == 0 [L1024] len = 1 VAL [end={-2:0}, inner={-1:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1027] COND FALSE !(!(((void*)0) != inner)) VAL [end={-2:0}, inner={-1:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1028] EXPR inner->inner VAL [end={-2:0}, inner={-1:0}, inner->inner={0:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next VAL [end={-2:0}, inner={-1:0}, inner->next={0:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() VAL [end={-2:0}, inner={-1:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.6s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1018 SDtfs, 1172 SDslu, 1633 SDs, 0 SdLazy, 733 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 284 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 500 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 309 NumberOfCodeBlocks, 305 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 265 ConstructedInterpolants, 6 QuantifiedInterpolants, 51575 SizeOfPredicates, 76 NumberOfNonLiveVariables, 1131 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 1/1 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...