/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-token-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:31:27,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:31:27,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:31:27,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:31:27,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:31:27,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:31:27,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:31:27,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:31:27,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:31:27,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:31:27,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:31:27,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:31:27,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:31:27,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:31:27,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:31:27,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:31:27,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:31:27,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:31:27,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:31:27,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:31:27,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:31:27,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:31:27,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:31:27,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:31:27,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:31:27,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:31:27,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:31:27,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:31:27,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:31:27,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:31:27,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:31:27,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:31:27,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:31:27,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:31:27,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:31:27,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:31:27,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:31:27,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:31:27,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:31:27,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:31:27,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:31:27,412 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 11:31:27,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:31:27,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:31:27,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:31:27,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:31:27,439 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:31:27,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:31:27,439 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:31:27,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:31:27,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:31:27,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:31:27,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:31:27,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:31:27,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:31:27,441 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:31:27,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:31:27,442 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:31:27,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:31:27,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:31:27,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:31:27,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:31:27,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:31:27,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:27,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:31:27,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:31:27,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:31:27,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:31:27,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:27,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:31:27,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:31:27,445 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 -> NOT_INCREMENTALLY [2020-07-20 11:31:27,757 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:31:27,771 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:31:27,775 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:31:27,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:31:27,776 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:31:27,777 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-07-20 11:31:27,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b99727f4/eafbe55e5d464e439d8cc5a092620bdf/FLAG26733960c [2020-07-20 11:31:28,374 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:31:28,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-07-20 11:31:28,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b99727f4/eafbe55e5d464e439d8cc5a092620bdf/FLAG26733960c [2020-07-20 11:31:28,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b99727f4/eafbe55e5d464e439d8cc5a092620bdf [2020-07-20 11:31:28,623 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:31:28,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:31:28,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:28,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:31:28,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:31:28,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:28" (1/1) ... [2020-07-20 11:31:28,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26972952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:28, skipping insertion in model container [2020-07-20 11:31:28,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:28" (1/1) ... [2020-07-20 11:31:28,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:31:28,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:31:29,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:29,135 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:31:29,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:29,269 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:31:29,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29 WrapperNode [2020-07-20 11:31:29,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:29,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:31:29,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:31:29,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:31:29,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29" (1/1) ... [2020-07-20 11:31:29,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29" (1/1) ... [2020-07-20 11:31:29,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29" (1/1) ... [2020-07-20 11:31:29,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29" (1/1) ... [2020-07-20 11:31:29,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29" (1/1) ... [2020-07-20 11:31:29,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29" (1/1) ... [2020-07-20 11:31:29,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29" (1/1) ... [2020-07-20 11:31:29,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:31:29,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:31:29,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:31:29,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:31:29,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:31:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:31:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:31:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:31:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:31:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:31:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:31:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:31:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:31:29,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:31:29,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:31:29,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:31:29,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:31:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:31:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:31:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:31:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:31:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:31:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:31:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:31:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:31:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:31:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:31:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:31:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:31:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:31:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:31:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:31:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:31:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:31:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:31:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:31:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:31:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:31:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:31:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:31:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:31:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:31:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:31:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:31:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:31:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:31:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:31:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:31:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:31:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:31:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:31:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:31:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:31:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:31:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:31:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:31:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:31:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:31:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:31:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:31:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:31:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:31:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:31:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:31:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:31:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:31:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:31:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:31:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:31:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:31:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:31:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:31:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:31:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:31:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:31:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:31:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:31:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:31:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:31:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:31:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:31:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:31:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:31:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:31:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:31:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:31:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:31:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:31:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:31:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:31:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:31:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:31:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:31:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:31:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:31:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:31:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:31:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:31:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:31:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:31:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:31:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:31:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:31:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:31:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:31:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:31:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:31:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:31:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:31:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:31:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:31:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:31:29,978 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:31:29,979 INFO L295 CfgBuilder]: Removed 15 assume(true) statements. [2020-07-20 11:31:29,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:29 BoogieIcfgContainer [2020-07-20 11:31:29,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:31:29,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:31:29,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:31:29,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:31:29,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:31:28" (1/3) ... [2020-07-20 11:31:29,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6231f427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:29, skipping insertion in model container [2020-07-20 11:31:29,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29" (2/3) ... [2020-07-20 11:31:29,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6231f427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:29, skipping insertion in model container [2020-07-20 11:31:29,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:29" (3/3) ... [2020-07-20 11:31:29,994 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2020-07-20 11:31:30,004 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:31:30,013 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-07-20 11:31:30,027 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-07-20 11:31:30,047 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:31:30,047 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:31:30,048 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:31:30,048 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:31:30,048 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:31:30,048 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:31:30,048 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:31:30,049 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:31:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-07-20 11:31:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:31:30,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:30,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:30,072 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:30,078 INFO L82 PathProgramCache]: Analyzing trace with hash 68430596, now seen corresponding path program 1 times [2020-07-20 11:31:30,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:30,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960652130] [2020-07-20 11:31:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:30,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:31:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:30,321 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 11:31:30,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:30,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960652130] [2020-07-20 11:31:30,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:30,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:31:30,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918630588] [2020-07-20 11:31:30,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:31:30,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:30,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:31:30,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:30,350 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2020-07-20 11:31:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:30,387 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2020-07-20 11:31:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:31:30,390 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 11:31:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:30,414 INFO L225 Difference]: With dead ends: 92 [2020-07-20 11:31:30,414 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 11:31:30,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 11:31:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 11:31:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 11:31:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-07-20 11:31:30,470 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 10 [2020-07-20 11:31:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:30,471 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-07-20 11:31:30,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:31:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-07-20 11:31:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:31:30,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:30,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:30,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:30,688 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash 67663975, now seen corresponding path program 1 times [2020-07-20 11:31:30,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:30,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470259668] [2020-07-20 11:31:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:31:30,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:30,855 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 11:31:30,856 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,867 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,867 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 11:31:30,914 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,915 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 11:31:30,916 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:30,919 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,929 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:30,934 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,941 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,943 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,943 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:48, output treesize:4 [2020-07-20 11:31:30,949 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 11:31:30,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:30,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470259668] [2020-07-20 11:31:30,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:30,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:30,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131872331] [2020-07-20 11:31:30,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:30,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:30,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:30,953 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 4 states. [2020-07-20 11:31:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:31,039 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-07-20 11:31:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:31:31,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-20 11:31:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:31,041 INFO L225 Difference]: With dead ends: 43 [2020-07-20 11:31:31,041 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 11:31:31,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 11:31:31,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 11:31:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-20 11:31:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:31:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-07-20 11:31:31,049 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 10 [2020-07-20 11:31:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:31,049 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-07-20 11:31:31,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-07-20 11:31:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:31:31,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:31,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:31,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:31,264 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2097539711, now seen corresponding path program 1 times [2020-07-20 11:31:31,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:31,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631216810] [2020-07-20 11:31:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:31,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:31:31,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:31,387 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 11:31:31,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:31,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631216810] [2020-07-20 11:31:31,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:31,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:31,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633144244] [2020-07-20 11:31:31,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:31,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:31,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:31,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:31,391 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-07-20 11:31:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:31,470 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-07-20 11:31:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:31:31,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-20 11:31:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:31,472 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:31:31,472 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 11:31:31,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 11:31:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 11:31:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2020-07-20 11:31:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 11:31:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-20 11:31:31,481 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2020-07-20 11:31:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:31,481 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-20 11:31:31,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-20 11:31:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:31:31,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:31,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:31,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:31,696 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash -409997773, now seen corresponding path program 1 times [2020-07-20 11:31:31,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:31,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018618599] [2020-07-20 11:31:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:31,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:31:31,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:31,836 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 11:31:31,837 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,838 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,839 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,839 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 11:31:31,845 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 11:31:31,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:31,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018618599] [2020-07-20 11:31:31,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:31,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:31,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023499154] [2020-07-20 11:31:31,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:31,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:31,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:31,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:31,848 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2020-07-20 11:31:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:31,921 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-20 11:31:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:31,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 11:31:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:31,922 INFO L225 Difference]: With dead ends: 39 [2020-07-20 11:31:31,922 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:31:31,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:31:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:31:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-20 11:31:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 11:31:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-07-20 11:31:31,928 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 16 [2020-07-20 11:31:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:31,929 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-07-20 11:31:31,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-07-20 11:31:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:31:31,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:31,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:32,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:32,142 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:32,143 INFO L82 PathProgramCache]: Analyzing trace with hash -409960037, now seen corresponding path program 1 times [2020-07-20 11:31:32,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:32,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338468725] [2020-07-20 11:31:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:32,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 11:31:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:32,247 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 11:31:32,247 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,253 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,253 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,254 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-20 11:31:32,320 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,320 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 11:31:32,322 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:32,324 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,364 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,373 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_30|], 2=[|v_#memory_int_28|, |v_#memory_int_29|, |v_#memory_$Pointer$.offset_21|, |v_#memory_$Pointer$.base_22|]} [2020-07-20 11:31:32,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,401 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 20 treesize of output 9 [2020-07-20 11:31:32,401 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,427 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,438 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:32,460 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,568 INFO L350 Elim1Store]: treesize reduction 154, result has 52.9 percent of original size [2020-07-20 11:31:32,568 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 245 [2020-07-20 11:31:32,570 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,609 INFO L624 ElimStorePlain]: treesize reduction 154, result has 37.4 percent of original size [2020-07-20 11:31:32,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,615 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,625 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,628 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,639 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,641 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 5 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:32,641 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:153, output treesize:23 [2020-07-20 11:31:32,711 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 11:31:32,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:32,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338468725] [2020-07-20 11:31:32,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:32,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:32,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787758793] [2020-07-20 11:31:32,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:32,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:32,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:32,713 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-07-20 11:31:32,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:32,921 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-20 11:31:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:32,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 11:31:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:32,923 INFO L225 Difference]: With dead ends: 72 [2020-07-20 11:31:32,924 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:31:32,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:31:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:31:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-20 11:31:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 11:31:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-07-20 11:31:32,931 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 16 [2020-07-20 11:31:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:32,931 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-07-20 11:31:32,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-07-20 11:31:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:31:32,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:32,933 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 11:31:33,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:33,146 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:33,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1407314597, now seen corresponding path program 1 times [2020-07-20 11:31:33,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:33,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904945321] [2020-07-20 11:31:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:33,296 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:33,353 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:33,382 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:31:33,382 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:31:33,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:33,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:31:33 BoogieIcfgContainer [2020-07-20 11:31:33,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:31:33,614 INFO L168 Benchmark]: Toolchain (without parser) took 4989.75 ms. Allocated memory was 147.8 MB in the beginning and 245.4 MB in the end (delta: 97.5 MB). Free memory was 104.8 MB in the beginning and 202.4 MB in the end (delta: -97.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:31:33,615 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 147.8 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 11:31:33,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 643.62 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 104.4 MB in the beginning and 171.6 MB in the end (delta: -67.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:33,616 INFO L168 Benchmark]: Boogie Preprocessor took 67.21 ms. Allocated memory is still 203.9 MB. Free memory was 171.6 MB in the beginning and 168.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:33,617 INFO L168 Benchmark]: RCFGBuilder took 647.23 ms. Allocated memory is still 203.9 MB. Free memory was 168.7 MB in the beginning and 121.2 MB in the end (delta: 47.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:33,617 INFO L168 Benchmark]: TraceAbstraction took 3625.28 ms. Allocated memory was 203.9 MB in the beginning and 245.4 MB in the end (delta: 41.4 MB). Free memory was 120.5 MB in the beginning and 202.4 MB in the end (delta: -81.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:31:33,623 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 147.8 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 643.62 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 104.4 MB in the beginning and 171.6 MB in the end (delta: -67.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.21 ms. Allocated memory is still 203.9 MB. Free memory was 171.6 MB in the beginning and 168.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 647.23 ms. Allocated memory is still 203.9 MB. Free memory was 168.7 MB in the beginning and 121.2 MB in the end (delta: 47.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3625.28 ms. Allocated memory was 203.9 MB in the beginning and 245.4 MB in the end (delta: 41.4 MB). Free memory was 120.5 MB in the beginning and 202.4 MB in the end (delta: -81.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1026]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L993] SLL* head = malloc(sizeof(SLL)); [L994] head->next = ((void*)0) [L995] head->prev = ((void*)0) [L996] head->data = 0 [L998] SLL* x = head; VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1010] x->data = 1 [L1011] x->next = malloc(sizeof(SLL)) [L1012] EXPR x->next [L1012] x->next->prev = x [L1013] EXPR x->next [L1013] x->next->data = 2 [L1015] x = head VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] [L1017] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] [L1019] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}, x->data=1] [L1019] COND FALSE !(1 != x->data) [L1024] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}, x->data=1] [L1024] COND FALSE !(!(1 == x->data)) [L1025] EXPR x->next [L1025] x = x->next [L1026] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-2:0}, x->data=2] [L1026] COND TRUE !(2 != x->data) [L1026] __VERIFIER_error() VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 185 SDtfs, 91 SDslu, 204 SDs, 0 SdLazy, 135 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 58 ConstructedInterpolants, 4 QuantifiedInterpolants, 3271 SizeOfPredicates, 14 NumberOfNonLiveVariables, 408 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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...