/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:55:35,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:55:35,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:55:35,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:55:35,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:55:35,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:55:35,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:55:35,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:55:35,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:55:35,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:55:35,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:55:35,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:55:35,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:55:35,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:55:35,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:55:35,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:55:35,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:55:35,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:55:35,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:55:35,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:55:35,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:55:35,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:55:35,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:55:35,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:55:35,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:55:35,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:55:35,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:55:35,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:55:35,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:55:35,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:55:35,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:55:35,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:55:35,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:55:35,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:55:35,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:55:35,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:55:35,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:55:35,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:55:35,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:55:35,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:55:35,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:55:35,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:55:35,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:55:35,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:55:35,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:55:35,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:55:35,520 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:55:35,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:55:35,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:55:35,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:55:35,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:55:35,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:55:35,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:55:35,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:55:35,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:55:35,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:55:35,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:55:35,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:55:35,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:55:35,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:55:35,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:55:35,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:55:35,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:55:35,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:55:35,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:55:35,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:55:35,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:55:35,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:55:35,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:35,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:55:35,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:55:35,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:55:35,828 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:55:35,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:55:35,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:55:35,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:55:35,852 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:55:35,853 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-20 13:55:35,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c320ee7cd/6241a62431bf4a0d8d076b7b41c71fab/FLAG386171906 [2020-07-20 13:55:36,475 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:55:36,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-20 13:55:36,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c320ee7cd/6241a62431bf4a0d8d076b7b41c71fab/FLAG386171906 [2020-07-20 13:55:36,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c320ee7cd/6241a62431bf4a0d8d076b7b41c71fab [2020-07-20 13:55:36,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:55:36,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:55:36,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:55:36,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:55:36,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:55:36,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:36" (1/1) ... [2020-07-20 13:55:36,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ccb0c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:36, skipping insertion in model container [2020-07-20 13:55:36,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:36" (1/1) ... [2020-07-20 13:55:36,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:55:36,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:55:37,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:55:37,314 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:55:37,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:55:37,421 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:55:37,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37 WrapperNode [2020-07-20 13:55:37,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:55:37,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:55:37,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:55:37,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:55:37,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37" (1/1) ... [2020-07-20 13:55:37,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37" (1/1) ... [2020-07-20 13:55:37,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37" (1/1) ... [2020-07-20 13:55:37,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37" (1/1) ... [2020-07-20 13:55:37,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37" (1/1) ... [2020-07-20 13:55:37,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37" (1/1) ... [2020-07-20 13:55:37,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37" (1/1) ... [2020-07-20 13:55:37,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:55:37,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:55:37,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:55:37,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:55:37,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:55:37,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:55:37,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:55:37,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:55:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 13:55:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 13:55:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 13:55:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 13:55:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 13:55:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 13:55:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 13:55:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 13:55:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 13:55:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 13:55:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 13:55:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 13:55:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 13:55:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 13:55:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 13:55:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 13:55:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 13:55:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 13:55:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 13:55:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 13:55:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 13:55:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 13:55:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 13:55:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 13:55:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 13:55:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 13:55:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 13:55:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 13:55:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 13:55:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 13:55:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 13:55:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 13:55:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 13:55:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 13:55:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 13:55:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 13:55:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 13:55:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 13:55:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 13:55:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 13:55:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 13:55:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 13:55:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 13:55:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 13:55:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 13:55:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 13:55:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 13:55:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 13:55:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 13:55:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 13:55:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 13:55:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 13:55:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 13:55:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 13:55:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 13:55:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 13:55:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 13:55:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 13:55:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 13:55:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 13:55:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 13:55:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 13:55:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 13:55:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 13:55:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 13:55:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 13:55:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 13:55:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 13:55:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 13:55:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 13:55:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 13:55:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 13:55:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 13:55:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 13:55:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 13:55:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 13:55:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 13:55:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 13:55:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 13:55:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 13:55:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 13:55:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 13:55:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 13:55:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 13:55:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 13:55:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 13:55:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 13:55:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 13:55:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 13:55:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 13:55:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 13:55:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 13:55:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 13:55:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 13:55:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 13:55:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 13:55:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 13:55:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 13:55:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 13:55:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 13:55:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 13:55:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 13:55:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 13:55:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:55:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:55:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:55:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 13:55:37,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 13:55:37,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 13:55:37,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:55:37,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:55:37,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:55:38,255 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:55:38,255 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-20 13:55:38,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:38 BoogieIcfgContainer [2020-07-20 13:55:38,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:55:38,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:55:38,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:55:38,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:55:38,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:55:36" (1/3) ... [2020-07-20 13:55:38,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcdb260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:38, skipping insertion in model container [2020-07-20 13:55:38,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:37" (2/3) ... [2020-07-20 13:55:38,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcdb260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:38, skipping insertion in model container [2020-07-20 13:55:38,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:38" (3/3) ... [2020-07-20 13:55:38,270 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-07-20 13:55:38,280 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:55:38,288 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-20 13:55:38,302 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-20 13:55:38,323 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:55:38,323 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:55:38,323 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:55:38,324 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:55:38,324 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:55:38,324 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:55:38,325 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:55:38,325 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:55:38,348 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-07-20 13:55:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 13:55:38,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:38,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:38,356 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]=== [2020-07-20 13:55:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-07-20 13:55:38,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:38,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624744951] [2020-07-20 13:55:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:38,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:38,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:38,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:55:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:38,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:38,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624744951] [2020-07-20 13:55:38,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:38,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:55:38,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690627909] [2020-07-20 13:55:38,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:55:38,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:55:38,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:55:38,602 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 3 states. [2020-07-20 13:55:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:38,684 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-07-20 13:55:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:55:38,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 13:55:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:38,697 INFO L225 Difference]: With dead ends: 186 [2020-07-20 13:55:38,697 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 13:55:38,701 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 [2020-07-20 13:55:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 13:55:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-07-20 13:55:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 13:55:38,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-20 13:55:38,748 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-07-20 13:55:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:38,748 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-20 13:55:38,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:55:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-20 13:55:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:55:38,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:38,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:38,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:38,964 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]=== [2020-07-20 13:55:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:38,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-07-20 13:55:38,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:38,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755826656] [2020-07-20 13:55:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:39,072 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:39,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:55:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:39,142 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 [2020-07-20 13:55:39,143 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:39,155 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:39,161 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 [2020-07-20 13:55:39,161 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:39,167 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:39,168 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:39,168 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:39,189 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:39,191 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:39,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:39,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755826656] [2020-07-20 13:55:39,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:39,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:39,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037218838] [2020-07-20 13:55:39,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:39,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:39,208 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-07-20 13:55:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:39,331 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2020-07-20 13:55:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:55:39,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 13:55:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:39,333 INFO L225 Difference]: With dead ends: 205 [2020-07-20 13:55:39,334 INFO L226 Difference]: Without dead ends: 136 [2020-07-20 13:55:39,335 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 [2020-07-20 13:55:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-20 13:55:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 83. [2020-07-20 13:55:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-20 13:55:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2020-07-20 13:55:39,349 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 14 [2020-07-20 13:55:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:39,349 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2020-07-20 13:55:39,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2020-07-20 13:55:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:55:39,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:39,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:39,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:39,564 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]=== [2020-07-20 13:55:39,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:39,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-07-20 13:55:39,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:39,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209391103] [2020-07-20 13:55:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:39,707 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:55:39,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:55:39,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:39,730 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 [2020-07-20 13:55:39,731 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:39,740 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:39,745 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 [2020-07-20 13:55:39,745 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:39,755 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:39,756 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:39,757 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:39,774 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:39,775 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:39,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:39,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209391103] [2020-07-20 13:55:39,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:39,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:39,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84943903] [2020-07-20 13:55:39,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:39,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:39,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:39,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:39,791 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 4 states. [2020-07-20 13:55:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:39,914 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2020-07-20 13:55:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:55:39,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 13:55:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:39,917 INFO L225 Difference]: With dead ends: 137 [2020-07-20 13:55:39,917 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 13:55:39,918 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 [2020-07-20 13:55:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 13:55:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2020-07-20 13:55:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 13:55:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-07-20 13:55:39,928 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 14 [2020-07-20 13:55:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:39,929 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-07-20 13:55:39,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-07-20 13:55:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:55:39,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:39,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:40,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:40,144 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]=== [2020-07-20 13:55:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:40,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-07-20 13:55:40,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:40,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028416376] [2020-07-20 13:55:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:40,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:55:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:55:40,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:40,273 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 [2020-07-20 13:55:40,273 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,275 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:40,276 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 13:55:40,306 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:40,307 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 [2020-07-20 13:55:40,308 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,331 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:40,333 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_37|], 8=[|v_#memory_$Pointer$.base_37|]} [2020-07-20 13:55:40,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:40,339 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,350 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:40,358 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2020-07-20 13:55:40,358 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,369 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:40,370 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. [2020-07-20 13:55:40,370 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:186, output treesize:47 [2020-07-20 13:55:40,387 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 13:55:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:40,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:40,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028416376] [2020-07-20 13:55:40,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:40,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:55:40,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311528167] [2020-07-20 13:55:40,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:55:40,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:40,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:55:40,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:55:40,398 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 5 states. [2020-07-20 13:55:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:40,567 INFO L93 Difference]: Finished difference Result 220 states and 242 transitions. [2020-07-20 13:55:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:55:40,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:55:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:40,571 INFO L225 Difference]: With dead ends: 220 [2020-07-20 13:55:40,571 INFO L226 Difference]: Without dead ends: 151 [2020-07-20 13:55:40,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:55:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-20 13:55:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2020-07-20 13:55:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 13:55:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-07-20 13:55:40,582 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 14 [2020-07-20 13:55:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:40,583 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-07-20 13:55:40,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:55:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-07-20 13:55:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:55:40,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:40,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:40,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:40,799 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]=== [2020-07-20 13:55:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-07-20 13:55:40,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:40,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269504189] [2020-07-20 13:55:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:40,919 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:40,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:55:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:40,928 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 [2020-07-20 13:55:40,928 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,930 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:40,930 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,930 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 13:55:40,962 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:40,963 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 [2020-07-20 13:55:40,963 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,972 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:40,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:40,975 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,981 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:40,982 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:40,983 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:46, output treesize:4 [2020-07-20 13:55:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:40,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:40,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269504189] [2020-07-20 13:55:40,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:40,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:55:40,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718707124] [2020-07-20 13:55:40,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:55:40,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:55:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:55:40,991 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 5 states. [2020-07-20 13:55:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:41,109 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2020-07-20 13:55:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:55:41,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 13:55:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:41,110 INFO L225 Difference]: With dead ends: 126 [2020-07-20 13:55:41,110 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 13:55:41,111 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 [2020-07-20 13:55:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 13:55:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-07-20 13:55:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 13:55:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-07-20 13:55:41,118 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 19 [2020-07-20 13:55:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:41,119 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-07-20 13:55:41,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:55:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-07-20 13:55:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 13:55:41,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:41,120 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] [2020-07-20 13:55:41,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:41,335 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]=== [2020-07-20 13:55:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-07-20 13:55:41,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:41,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145951490] [2020-07-20 13:55:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:41,437 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:41,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:41,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:55:41,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:41,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:41,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145951490] [2020-07-20 13:55:41,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:41,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:41,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715506439] [2020-07-20 13:55:41,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:41,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:41,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:41,456 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 4 states. [2020-07-20 13:55:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:41,535 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2020-07-20 13:55:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:55:41,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 13:55:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:41,538 INFO L225 Difference]: With dead ends: 136 [2020-07-20 13:55:41,538 INFO L226 Difference]: Without dead ends: 116 [2020-07-20 13:55:41,539 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 [2020-07-20 13:55:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-20 13:55:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-07-20 13:55:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 13:55:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-07-20 13:55:41,547 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 20 [2020-07-20 13:55:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:41,548 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-07-20 13:55:41,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-07-20 13:55:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 13:55:41,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:41,549 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] [2020-07-20 13:55:41,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:41,751 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]=== [2020-07-20 13:55:41,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:41,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-07-20 13:55:41,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:41,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435557645] [2020-07-20 13:55:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:41,843 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:41,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:41,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 13:55:41,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:41,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:41,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435557645] [2020-07-20 13:55:41,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:41,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:55:41,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007620476] [2020-07-20 13:55:41,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:55:41,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:41,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:55:41,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:55:41,856 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 3 states. [2020-07-20 13:55:41,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:41,873 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-07-20 13:55:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:55:41,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 13:55:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:41,875 INFO L225 Difference]: With dead ends: 102 [2020-07-20 13:55:41,875 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 13:55:41,876 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 [2020-07-20 13:55:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 13:55:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2020-07-20 13:55:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 13:55:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-07-20 13:55:41,882 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 24 [2020-07-20 13:55:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:41,882 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-07-20 13:55:41,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:55:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-07-20 13:55:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:55:41,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:41,884 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] [2020-07-20 13:55:42,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:42,099 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]=== [2020-07-20 13:55:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:42,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-07-20 13:55:42,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:42,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792427402] [2020-07-20 13:55:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:42,179 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:42,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:55:42,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:42,203 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 [2020-07-20 13:55:42,203 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:42,208 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:42,211 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 [2020-07-20 13:55:42,211 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:42,216 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:42,217 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:42,217 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:42,250 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 19 treesize of output 7 [2020-07-20 13:55:42,251 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:42,259 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:42,261 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 19 treesize of output 7 [2020-07-20 13:55:42,262 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:42,267 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:42,267 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:42,267 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 13:55:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:42,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:42,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792427402] [2020-07-20 13:55:42,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:42,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:55:42,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128974446] [2020-07-20 13:55:42,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:55:42,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:42,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:55:42,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:55:42,283 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 5 states. [2020-07-20 13:55:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:42,507 INFO L93 Difference]: Finished difference Result 186 states and 209 transitions. [2020-07-20 13:55:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:55:42,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-20 13:55:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:42,509 INFO L225 Difference]: With dead ends: 186 [2020-07-20 13:55:42,509 INFO L226 Difference]: Without dead ends: 143 [2020-07-20 13:55:42,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:55:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-20 13:55:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 88. [2020-07-20 13:55:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 13:55:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2020-07-20 13:55:42,516 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 25 [2020-07-20 13:55:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:42,517 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2020-07-20 13:55:42,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:55:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2020-07-20 13:55:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:55:42,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:42,518 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] [2020-07-20 13:55:42,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:42,719 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]=== [2020-07-20 13:55:42,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:42,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1502808758, now seen corresponding path program 1 times [2020-07-20 13:55:42,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:42,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055196301] [2020-07-20 13:55:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:42,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:42,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:42,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:55:42,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:42,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:42,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055196301] [2020-07-20 13:55:42,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:42,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:55:42,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490800035] [2020-07-20 13:55:42,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:55:42,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:42,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:55:42,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:55:42,856 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 3 states. [2020-07-20 13:55:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:42,868 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-07-20 13:55:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:55:42,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 13:55:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:42,870 INFO L225 Difference]: With dead ends: 88 [2020-07-20 13:55:42,870 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 13:55:42,871 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 [2020-07-20 13:55:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 13:55:42,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-20 13:55:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-20 13:55:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-07-20 13:55:42,876 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 25 [2020-07-20 13:55:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:42,877 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-07-20 13:55:42,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:55:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-07-20 13:55:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:55:42,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:42,878 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] [2020-07-20 13:55:43,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:43,080 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]=== [2020-07-20 13:55:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:43,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-07-20 13:55:43,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:43,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314506962] [2020-07-20 13:55:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:43,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:55:43,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:43,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:55:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:43,231 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 [2020-07-20 13:55:43,232 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:43,242 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:43,245 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 [2020-07-20 13:55:43,245 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:43,250 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:43,250 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:43,251 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:43,261 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:43,265 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:43,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:43,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314506962] [2020-07-20 13:55:43,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:43,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:43,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254546807] [2020-07-20 13:55:43,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:43,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:43,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:43,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:43,275 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 4 states. [2020-07-20 13:55:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:43,366 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-07-20 13:55:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:55:43,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-20 13:55:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:43,368 INFO L225 Difference]: With dead ends: 96 [2020-07-20 13:55:43,368 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 13:55:43,368 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 [2020-07-20 13:55:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 13:55:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2020-07-20 13:55:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-20 13:55:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-07-20 13:55:43,374 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 27 [2020-07-20 13:55:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:43,374 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-07-20 13:55:43,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-07-20 13:55:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:55:43,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:43,376 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] [2020-07-20 13:55:43,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:43,577 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]=== [2020-07-20 13:55:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:43,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1630846939, now seen corresponding path program 1 times [2020-07-20 13:55:43,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:43,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546582102] [2020-07-20 13:55:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:43,669 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:55:43,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:43,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 13:55:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:43,689 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 [2020-07-20 13:55:43,689 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:43,698 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:43,701 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-07-20 13:55:43,728 INFO L624 ElimStorePlain]: treesize reduction 21, result has 30.0 percent of original size [2020-07-20 13:55:43,728 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:43,729 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:38, output treesize:5 [2020-07-20 13:55:43,756 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:43,756 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 [2020-07-20 13:55:43,757 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:43,774 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:43,776 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_40|], 8=[|v_#memory_$Pointer$.base_42|]} [2020-07-20 13:55:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:43,779 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:43,791 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:43,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:43,813 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-20 13:55:43,814 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 [2020-07-20 13:55:43,815 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:43,824 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:43,826 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. [2020-07-20 13:55:43,826 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:186, output treesize:49 [2020-07-20 13:55:43,846 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 13:55:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:43,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:43,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546582102] [2020-07-20 13:55:43,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:43,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:55:43,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275477252] [2020-07-20 13:55:43,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:55:43,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:43,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:55:43,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:55:43,858 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 5 states. [2020-07-20 13:55:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:44,068 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2020-07-20 13:55:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:55:44,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 13:55:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:44,070 INFO L225 Difference]: With dead ends: 157 [2020-07-20 13:55:44,070 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 13:55:44,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:55:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 13:55:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2020-07-20 13:55:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-20 13:55:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-07-20 13:55:44,076 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 27 [2020-07-20 13:55:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:44,077 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-07-20 13:55:44,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:55:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-07-20 13:55:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 13:55:44,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:44,078 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] [2020-07-20 13:55:44,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:44,290 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]=== [2020-07-20 13:55:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:44,291 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-07-20 13:55:44,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:44,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893845990] [2020-07-20 13:55:44,292 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 [2020-07-20 13:55:44,431 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:44,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:55:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:44,446 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 [2020-07-20 13:55:44,446 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:44,452 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:44,453 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:44,453 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 13:55:44,487 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:44,488 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 [2020-07-20 13:55:44,489 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:44,537 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:44,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:44,560 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 13:55:44,578 INFO L350 Elim1Store]: treesize reduction 87, result has 9.4 percent of original size [2020-07-20 13:55:44,578 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 [2020-07-20 13:55:44,579 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:44,601 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:44,608 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 [2020-07-20 13:55:44,609 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:44,626 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:44,627 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. [2020-07-20 13:55:44,627 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-20 13:55:44,736 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 13:55:44,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:44,753 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-20 13:55:44,754 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 [2020-07-20 13:55:44,756 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 13:55:44,758 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 13:55:44,759 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:55:44,789 INFO L624 ElimStorePlain]: treesize reduction 8, result has 84.0 percent of original size [2020-07-20 13:55:44,801 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:44,801 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 [2020-07-20 13:55:44,803 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:44,809 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:44,809 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:44,810 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:7 [2020-07-20 13:55:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:44,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:44,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893845990] [2020-07-20 13:55:44,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:44,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 13:55:44,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210307077] [2020-07-20 13:55:44,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:55:44,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:44,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:55:44,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:55:44,831 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 7 states. [2020-07-20 13:55:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:45,577 INFO L93 Difference]: Finished difference Result 228 states and 252 transitions. [2020-07-20 13:55:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:55:45,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 13:55:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:45,579 INFO L225 Difference]: With dead ends: 228 [2020-07-20 13:55:45,579 INFO L226 Difference]: Without dead ends: 226 [2020-07-20 13:55:45,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:55:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-20 13:55:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 98. [2020-07-20 13:55:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 13:55:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2020-07-20 13:55:45,588 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 28 [2020-07-20 13:55:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:45,588 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2020-07-20 13:55:45,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:55:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2020-07-20 13:55:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 13:55:45,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:45,590 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] [2020-07-20 13:55:45,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:45,804 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]=== [2020-07-20 13:55:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-07-20 13:55:45,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:45,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027513214] [2020-07-20 13:55:45,806 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 [2020-07-20 13:55:45,893 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:45,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:55:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:45,906 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 [2020-07-20 13:55:45,906 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:45,911 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:45,924 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 [2020-07-20 13:55:45,925 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:45,929 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:45,930 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:45,930 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:45,949 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 19 treesize of output 7 [2020-07-20 13:55:45,950 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:45,956 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:45,959 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 19 treesize of output 7 [2020-07-20 13:55:45,960 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:45,965 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:45,965 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:45,966 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 13:55:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:55:45,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:45,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027513214] [2020-07-20 13:55:45,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:45,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:45,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038369799] [2020-07-20 13:55:45,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:45,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:45,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:45,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:45,983 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand 4 states. [2020-07-20 13:55:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:46,100 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2020-07-20 13:55:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:55:46,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-07-20 13:55:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:46,116 INFO L225 Difference]: With dead ends: 143 [2020-07-20 13:55:46,116 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 13:55:46,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:55:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 13:55:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-07-20 13:55:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 13:55:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2020-07-20 13:55:46,125 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 30 [2020-07-20 13:55:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:46,125 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2020-07-20 13:55:46,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2020-07-20 13:55:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 13:55:46,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:46,127 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] [2020-07-20 13:55:46,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:46,335 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]=== [2020-07-20 13:55:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-07-20 13:55:46,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:46,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367418944] [2020-07-20 13:55:46,337 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 [2020-07-20 13:55:46,431 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:46,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:46,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 13:55:46,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:46,444 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 [2020-07-20 13:55:46,445 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:46,449 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:46,450 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:46,450 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 13:55:46,476 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:46,476 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 [2020-07-20 13:55:46,477 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:46,496 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:46,500 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_43|], 8=[|v_#memory_$Pointer$.base_45|]} [2020-07-20 13:55:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:46,503 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:46,515 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:46,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:46,522 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2020-07-20 13:55:46,522 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:46,548 INFO L624 ElimStorePlain]: treesize reduction 4, result has 88.6 percent of original size [2020-07-20 13:55:46,549 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. [2020-07-20 13:55:46,550 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:189, output treesize:40 [2020-07-20 13:55:46,594 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:46,594 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2020-07-20 13:55:46,595 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:46,608 INFO L624 ElimStorePlain]: treesize reduction 4, result has 69.2 percent of original size [2020-07-20 13:55:46,608 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:46,609 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:4 [2020-07-20 13:55:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:55:46,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:46,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367418944] [2020-07-20 13:55:46,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:46,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:55:46,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582189669] [2020-07-20 13:55:46,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:55:46,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:46,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:55:46,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:55:46,629 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand 6 states. [2020-07-20 13:55:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:46,947 INFO L93 Difference]: Finished difference Result 251 states and 285 transitions. [2020-07-20 13:55:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:55:46,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-20 13:55:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:46,950 INFO L225 Difference]: With dead ends: 251 [2020-07-20 13:55:46,950 INFO L226 Difference]: Without dead ends: 210 [2020-07-20 13:55:46,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:55:46,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-20 13:55:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 117. [2020-07-20 13:55:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 13:55:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2020-07-20 13:55:46,963 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 30 [2020-07-20 13:55:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:46,964 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2020-07-20 13:55:46,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:55:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2020-07-20 13:55:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 13:55:46,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:46,965 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] [2020-07-20 13:55:47,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:47,179 INFO L427 AbstractCegarLoop]: === Iteration 15 === [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]=== [2020-07-20 13:55:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:47,180 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-07-20 13:55:47,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:47,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826746895] [2020-07-20 13:55:47,181 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:47,295 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:55:47,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:55:47,295 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:55:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:55:47,314 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:55:47,340 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:55:47,340 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:55:47,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:47,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:55:47 BoogieIcfgContainer [2020-07-20 13:55:47,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:55:47,609 INFO L168 Benchmark]: Toolchain (without parser) took 10817.76 ms. Allocated memory was 143.7 MB in the beginning and 313.0 MB in the end (delta: 169.3 MB). Free memory was 98.7 MB in the beginning and 146.4 MB in the end (delta: -47.6 MB). Peak memory consumption was 121.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:55:47,610 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 143.7 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 13:55:47,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 627.84 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 98.3 MB in the beginning and 168.0 MB in the end (delta: -69.7 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:55:47,613 INFO L168 Benchmark]: Boogie Preprocessor took 88.00 ms. Allocated memory is still 201.3 MB. Free memory was 168.0 MB in the beginning and 163.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:55:47,613 INFO L168 Benchmark]: RCFGBuilder took 749.66 ms. Allocated memory is still 201.3 MB. Free memory was 163.9 MB in the beginning and 108.4 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:55:47,614 INFO L168 Benchmark]: TraceAbstraction took 9346.48 ms. Allocated memory was 201.3 MB in the beginning and 313.0 MB in the end (delta: 111.7 MB). Free memory was 107.8 MB in the beginning and 146.4 MB in the end (delta: -38.6 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:55:47,615 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 143.7 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 627.84 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 98.3 MB in the beginning and 168.0 MB in the end (delta: -69.7 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.00 ms. Allocated memory is still 201.3 MB. Free memory was 168.0 MB in the beginning and 163.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 749.66 ms. Allocated memory is still 201.3 MB. Free memory was 163.9 MB in the beginning and 108.4 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9346.48 ms. Allocated memory was 201.3 MB in the beginning and 313.0 MB in the end (delta: 111.7 MB). Free memory was 107.8 MB in the beginning and 146.4 MB in the end (delta: -38.6 MB). Peak memory consumption was 73.1 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))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1015] COND FALSE !(!(((void*)0) != end)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [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))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1028] EXPR inner->inner VAL [end={-2:0}, inner={-1:0}, inner->inner={0:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [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: 9.2s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1139 SDtfs, 1257 SDslu, 2058 SDs, 0 SdLazy, 946 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 316 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 597 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 336 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 291 ConstructedInterpolants, 6 QuantifiedInterpolants, 73544 SizeOfPredicates, 84 NumberOfNonLiveVariables, 988 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 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...