/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-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:31:24,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:31:24,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:31:24,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:31:24,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:31:24,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:31:24,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:31:24,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:31:24,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:31:24,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:31:24,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:31:24,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:31:24,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:31:24,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:31:24,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:31:24,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:31:24,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:31:24,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:31:24,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:31:24,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:31:24,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:31:24,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:31:24,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:31:24,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:31:24,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:31:24,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:31:24,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:31:24,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:31:24,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:31:24,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:31:24,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:31:24,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:31:24,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:31:24,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:31:24,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:31:24,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:31:24,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:31:24,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:31:24,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:31:24,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:31:24,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:31:24,582 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 11:31:24,597 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:31:24,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:31:24,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:31:24,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:31:24,599 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:31:24,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:31:24,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:31:24,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:31:24,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:31:24,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:31:24,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:31:24,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:31:24,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:31:24,601 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:31:24,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:31:24,601 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:31:24,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:31:24,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:31:24,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:31:24,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:31:24,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:31:24,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:24,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:31:24,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:31:24,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:31:24,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:31:24,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:24,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:31:24,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:31:24,604 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 11:31:24,899 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:31:24,914 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:31:24,917 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:31:24,919 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:31:24,920 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:31:24,920 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-07-20 11:31:24,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96a86658d/52e55a116a47447d86cd597b3810eaf7/FLAGb686ab461 [2020-07-20 11:31:25,528 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:31:25,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-07-20 11:31:25,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96a86658d/52e55a116a47447d86cd597b3810eaf7/FLAGb686ab461 [2020-07-20 11:31:25,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96a86658d/52e55a116a47447d86cd597b3810eaf7 [2020-07-20 11:31:25,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:31:25,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:31:25,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:25,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:31:25,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:31:25,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:25" (1/1) ... [2020-07-20 11:31:25,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de2be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:25, skipping insertion in model container [2020-07-20 11:31:25,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:25" (1/1) ... [2020-07-20 11:31:25,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:31:25,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:31:26,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:26,465 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:31:26,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:26,607 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:31:26,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26 WrapperNode [2020-07-20 11:31:26,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:26,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:31:26,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:31:26,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:31:26,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:31:26,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:31:26,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:31:26,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:31:26,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (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 11:31:26,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:31:26,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:31:26,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:31:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:31:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:31:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:31:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:31:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:31:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:31:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:31:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:31:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:31:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:31:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:31:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:31:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:31:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:31:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:31:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:31:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:31:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:31:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:31:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:31:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:31:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:31:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:31:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:31:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:31:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:31:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:31:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:31:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:31:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:31:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:31:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:31:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:31:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:31:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:31:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:31:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:31:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:31:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:31:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:31:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:31:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:31:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:31:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:31:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:31:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:31:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:31:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:31:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:31:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:31:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:31:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:31:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:31:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:31:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:31:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:31:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:31:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:31:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:31:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:31:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:31:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:31:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:31:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:31:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:31:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:31:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:31:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:31:26,810 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:31:26,810 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:31:26,810 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:31:26,810 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:31:26,810 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:31:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:31:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:31:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:31:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:31:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:31:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:31:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:31:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:31:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:31:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:31:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:31:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:31:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:31:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:31:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:31:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:31:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:31:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:31:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:31:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:31:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:31:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:31:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:31:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:31:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:31:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:31:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:31:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:31:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:31:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:31:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:31:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:31:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:31:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:31:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:31:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:31:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:31:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:31:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:31:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:31:26,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:31:27,566 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:31:27,567 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-07-20 11:31:27,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:27 BoogieIcfgContainer [2020-07-20 11:31:27,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:31:27,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:31:27,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:31:27,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:31:27,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:31:25" (1/3) ... [2020-07-20 11:31:27,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c72cedc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:27, skipping insertion in model container [2020-07-20 11:31:27,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (2/3) ... [2020-07-20 11:31:27,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c72cedc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:27, skipping insertion in model container [2020-07-20 11:31:27,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:27" (3/3) ... [2020-07-20 11:31:27,584 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-07-20 11:31:27,598 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:31:27,608 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-07-20 11:31:27,627 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-07-20 11:31:27,658 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:31:27,658 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:31:27,658 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:31:27,659 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:31:27,659 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:31:27,659 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:31:27,660 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:31:27,660 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:31:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-07-20 11:31:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:31:27,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:27,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:27,726 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:27,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1255802584, now seen corresponding path program 1 times [2020-07-20 11:31:27,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:27,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606478447] [2020-07-20 11:31:27,748 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 11:31:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:31:27,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:28,016 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 11:31:28,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:28,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606478447] [2020-07-20 11:31:28,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:28,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:31:28,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610597736] [2020-07-20 11:31:28,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:31:28,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:28,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:31:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:28,051 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 2 states. [2020-07-20 11:31:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:28,097 INFO L93 Difference]: Finished difference Result 98 states and 156 transitions. [2020-07-20 11:31:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:31:28,099 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 11:31:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:28,120 INFO L225 Difference]: With dead ends: 98 [2020-07-20 11:31:28,120 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 11:31:28,134 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 11:31:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 11:31:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 11:31:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:31:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-07-20 11:31:28,199 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 10 [2020-07-20 11:31:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:28,200 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-07-20 11:31:28,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:31:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-07-20 11:31:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:31:28,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:28,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:28,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:28,419 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:28,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:28,420 INFO L82 PathProgramCache]: Analyzing trace with hash -338068956, now seen corresponding path program 1 times [2020-07-20 11:31:28,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:28,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465001532] [2020-07-20 11:31:28,421 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 11:31:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:28,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:31:28,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:28,604 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-07-20 11:31:28,607 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:28,615 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:28,616 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:28,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-07-20 11:31:28,642 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 11:31:28,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:28,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465001532] [2020-07-20 11:31:28,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:28,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:28,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168183482] [2020-07-20 11:31:28,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:28,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:28,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:28,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:28,647 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-07-20 11:31:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:28,787 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-07-20 11:31:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:31:28,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-20 11:31:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:28,790 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:31:28,790 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 11:31:28,791 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 11:31:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 11:31:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-20 11:31:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 11:31:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-07-20 11:31:28,800 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 11 [2020-07-20 11:31:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:28,800 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-07-20 11:31:28,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-07-20 11:31:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 11:31:28,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:28,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:29,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:29,018 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:29,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1890143313, now seen corresponding path program 1 times [2020-07-20 11:31:29,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:29,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129386443] [2020-07-20 11:31:29,019 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 11:31:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:29,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:31:29,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:29,150 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 11:31:29,151 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:29,153 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:29,154 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:29,154 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 11:31:29,172 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 11:31:29,173 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:29,175 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:29,176 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 11:31:29,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 11:31:29,182 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 11:31:29,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:29,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129386443] [2020-07-20 11:31:29,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:29,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:29,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140153058] [2020-07-20 11:31:29,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:29,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:29,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:29,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:29,185 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2020-07-20 11:31:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:29,267 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-07-20 11:31:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:31:29,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-20 11:31:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:29,269 INFO L225 Difference]: With dead ends: 43 [2020-07-20 11:31:29,269 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 11:31:29,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 11:31:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 11:31:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-20 11:31:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:31:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-07-20 11:31:29,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 12 [2020-07-20 11:31:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:29,278 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-07-20 11:31:29,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-07-20 11:31:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:31:29,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:29,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:29,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:29,493 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:29,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:29,494 INFO L82 PathProgramCache]: Analyzing trace with hash 290038970, now seen corresponding path program 1 times [2020-07-20 11:31:29,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:29,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393645803] [2020-07-20 11:31:29,495 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 11:31:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:29,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:31:29,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:29,614 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 11:31:29,614 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:29,617 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:29,617 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:29,617 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 11:31:29,640 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 11:31:29,642 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:29,644 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:29,644 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 11:31:29,645 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 11:31:29,652 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 11:31:29,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:29,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393645803] [2020-07-20 11:31:29,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:29,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:29,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520336177] [2020-07-20 11:31:29,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:29,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:29,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:29,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:29,674 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-07-20 11:31:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:29,832 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-07-20 11:31:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:31:29,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:31:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:29,834 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:31:29,834 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 11:31:29,835 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 11:31:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 11:31:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-07-20 11:31:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 11:31:29,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-20 11:31:29,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 14 [2020-07-20 11:31:29,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:29,844 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-20 11:31:29,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-20 11:31:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 11:31:29,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:29,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:30,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:30,060 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:30,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:30,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2060721718, now seen corresponding path program 1 times [2020-07-20 11:31:30,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:30,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596326238] [2020-07-20 11:31:30,062 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 11:31:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:31:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:30,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:30,336 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-07-20 11:31:30,338 INFO L350 Elim1Store]: treesize reduction 106, result has 48.5 percent of original size [2020-07-20 11:31:30,339 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 107 [2020-07-20 11:31:30,340 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,503 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-07-20 11:31:30,504 INFO L624 ElimStorePlain]: treesize reduction 36, result has 80.1 percent of original size [2020-07-20 11:31:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:30,663 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-07-20 11:31:30,664 INFO L350 Elim1Store]: treesize reduction 115, result has 44.2 percent of original size [2020-07-20 11:31:30,665 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 98 [2020-07-20 11:31:30,667 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,827 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-07-20 11:31:30,828 INFO L624 ElimStorePlain]: treesize reduction 36, result has 78.6 percent of original size [2020-07-20 11:31:30,836 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,842 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,845 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-20 11:31:30,851 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 11:31:30,854 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,860 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,864 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-20 11:31:30,872 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 11:31:30,876 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 11:31:30,885 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,888 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,892 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-20 11:31:30,897 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,899 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,900 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-20 11:31:30,904 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-07-20 11:31:30,909 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-20 11:31:30,910 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,912 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,916 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-20 11:31:30,918 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 11:31:30,921 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 11:31:30,923 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 11:31:30,927 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,931 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,934 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 11:31:30,936 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-20 11:31:30,939 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 11:31:30,941 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 11:31:30,943 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,944 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:149, output treesize:15 [2020-07-20 11:31:30,983 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 11:31:30,984 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,990 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,994 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 11:31:30,995 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,998 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,999 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 11:31:30,999 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:7 [2020-07-20 11:31:31,011 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 11:31:31,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:31,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596326238] [2020-07-20 11:31:31,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:31,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:31,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556071518] [2020-07-20 11:31:31,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:31,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:31,014 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 4 states. [2020-07-20 11:31:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:31,108 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-07-20 11:31:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:31:31,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-07-20 11:31:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:31,110 INFO L225 Difference]: With dead ends: 48 [2020-07-20 11:31:31,110 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 11:31:31,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 11:31:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 11:31:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-20 11:31:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 11:31:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-20 11:31:31,117 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 15 [2020-07-20 11:31:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:31,117 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-20 11:31:31,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-20 11:31:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:31:31,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:31,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:31,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:31,322 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:31,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:31,323 INFO L82 PathProgramCache]: Analyzing trace with hash 373775322, now seen corresponding path program 1 times [2020-07-20 11:31:31,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:31,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628385811] [2020-07-20 11:31:31,324 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 11:31:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:31,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 11:31:31,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:31,469 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-20 11:31:31,470 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 11:31:31,471 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,488 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,489 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,490 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:15 [2020-07-20 11:31:31,550 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,551 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 69 [2020-07-20 11:31:31,553 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,597 INFO L624 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2020-07-20 11:31:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:31,607 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,619 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,621 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:31,623 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:59, output treesize:28 [2020-07-20 11:31:31,684 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,685 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2020-07-20 11:31:31,686 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,702 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:31,706 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,717 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,719 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,719 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:66, output treesize:4 [2020-07-20 11:31:31,726 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 11:31:31,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:31,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628385811] [2020-07-20 11:31:31,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:31,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:31,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882828501] [2020-07-20 11:31:31,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:31,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:31,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:31,729 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-07-20 11:31:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:31,853 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-07-20 11:31:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:31:31,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-20 11:31:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:31,855 INFO L225 Difference]: With dead ends: 46 [2020-07-20 11:31:31,855 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 11:31:31,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 11:31:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 11:31:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 11:31:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-20 11:31:31,863 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-07-20 11:31:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:31,864 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-20 11:31:31,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-20 11:31:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:31:31,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:31,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:32,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:32,067 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:32,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1568846049, now seen corresponding path program 1 times [2020-07-20 11:31:32,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:32,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788297781] [2020-07-20 11:31:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:31:32,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:32,185 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 11:31:32,186 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,190 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,190 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 11:31:32,191 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 11:31:32,201 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 11:31:32,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:32,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788297781] [2020-07-20 11:31:32,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:32,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:32,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063362912] [2020-07-20 11:31:32,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:32,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:32,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:32,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:32,205 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2020-07-20 11:31:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:32,345 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-07-20 11:31:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:32,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-20 11:31:32,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:32,364 INFO L225 Difference]: With dead ends: 59 [2020-07-20 11:31:32,364 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:31:32,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 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 11:31:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:31:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 11:31:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 11:31:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-20 11:31:32,371 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 18 [2020-07-20 11:31:32,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:32,371 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-20 11:31:32,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-20 11:31:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:31:32,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:32,373 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:32,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:32,575 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:32,575 INFO L82 PathProgramCache]: Analyzing trace with hash 777661568, now seen corresponding path program 1 times [2020-07-20 11:31:32,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:32,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545194313] [2020-07-20 11:31:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:32,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:31:32,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,684 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 27 treesize of output 17 [2020-07-20 11:31:32,685 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,695 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,703 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 27 treesize of output 17 [2020-07-20 11:31:32,703 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,714 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,715 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,715 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2020-07-20 11:31:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:32,754 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 24 treesize of output 10 [2020-07-20 11:31:32,755 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,763 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,767 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-20 11:31:32,768 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 10 [2020-07-20 11:31:32,769 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,771 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,772 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 11:31:32,772 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:7 [2020-07-20 11:31:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:32,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:31:32,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:31:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:32,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545194313] [2020-07-20 11:31:32,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:31:32,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 11:31:32,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683837705] [2020-07-20 11:31:32,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:31:32,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:32,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:31:32,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:31:32,832 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-07-20 11:31:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:33,072 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-07-20 11:31:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:31:33,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-07-20 11:31:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:33,074 INFO L225 Difference]: With dead ends: 63 [2020-07-20 11:31:33,074 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 11:31:33,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:31:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 11:31:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-20 11:31:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:31:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-07-20 11:31:33,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 21 [2020-07-20 11:31:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:33,086 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-07-20 11:31:33,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:31:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-07-20 11:31:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:31:33,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:33,089 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:33,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:33,303 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:33,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1056872398, now seen corresponding path program 1 times [2020-07-20 11:31:33,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:33,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707501073] [2020-07-20 11:31:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:33,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-20 11:31:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:33,449 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-20 11:31:33,450 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-07-20 11:31:33,450 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:33,461 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:33,466 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 11:31:33,467 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:33,477 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:33,478 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:33,478 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:29 [2020-07-20 11:31:33,537 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:33,538 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-20 11:31:33,539 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:33,612 INFO L624 ElimStorePlain]: treesize reduction 14, result has 88.9 percent of original size [2020-07-20 11:31:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:33,623 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:33,649 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:33,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:33,662 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 11:31:33,662 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:33,685 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:33,692 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:33,711 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:33,728 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:33,729 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 1 case distinctions, treesize of input 45 treesize of output 48 [2020-07-20 11:31:33,730 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:33,778 INFO L624 ElimStorePlain]: treesize reduction 20, result has 70.6 percent of original size [2020-07-20 11:31:33,780 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:33,781 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:114, output treesize:27 [2020-07-20 11:31:33,908 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:33,908 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-20 11:31:33,910 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,003 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,006 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_34|, |v_#memory_int_44|, |v_#memory_$Pointer$.offset_32|, |v_#memory_int_42|, |v_#memory_int_43|], 4=[|v_#memory_int_46|]} [2020-07-20 11:31:34,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:34,011 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,061 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,065 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 11:31:34,116 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:34,120 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,150 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,155 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:34,178 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,185 INFO L544 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:34,205 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:34,219 INFO L350 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2020-07-20 11:31:34,220 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2020-07-20 11:31:34,221 INFO L544 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,240 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,243 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 6 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:34,244 INFO L244 ElimStorePlain]: Needed 8 recursive calls to eliminate 10 variables, input treesize:319, output treesize:41 [2020-07-20 11:31:34,350 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2020-07-20 11:31:34,351 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,357 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,358 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,358 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:43, output treesize:3 [2020-07-20 11:31:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:34,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:31:34,414 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_34|, |v_#memory_int_44|, |v_#memory_$Pointer$.offset_32|, |v_#memory_int_43|], 3=[|v_#memory_int_42|]} [2020-07-20 11:31:34,420 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,578 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-07-20 11:31:34,579 INFO L624 ElimStorePlain]: treesize reduction 154, result has 51.4 percent of original size [2020-07-20 11:31:34,583 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:34,626 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,636 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,777 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:31:34,777 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,788 INFO L544 ElimStorePlain]: Start of recursive call 5: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-07-20 11:31:34,920 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:31:34,920 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707501073] [2020-07-20 11:31:34,923 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2020-07-20 11:31:34,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:34,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-20 11:31:34,923 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-20 11:31:34,924 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:31:35,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:35,156 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-20 11:31:35,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:31:35 BoogieIcfgContainer [2020-07-20 11:31:35,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:31:35,163 INFO L168 Benchmark]: Toolchain (without parser) took 9345.50 ms. Allocated memory was 137.9 MB in the beginning and 282.1 MB in the end (delta: 144.2 MB). Free memory was 100.4 MB in the beginning and 163.2 MB in the end (delta: -62.7 MB). Peak memory consumption was 81.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,164 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 793.50 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 100.0 MB in the beginning and 172.8 MB in the end (delta: -72.7 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,170 INFO L168 Benchmark]: Boogie Preprocessor took 86.74 ms. Allocated memory is still 205.0 MB. Free memory was 172.8 MB in the beginning and 169.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,171 INFO L168 Benchmark]: RCFGBuilder took 875.56 ms. Allocated memory is still 205.0 MB. Free memory was 169.3 MB in the beginning and 117.4 MB in the end (delta: 51.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,171 INFO L168 Benchmark]: TraceAbstraction took 7582.05 ms. Allocated memory was 205.0 MB in the beginning and 282.1 MB in the end (delta: 77.1 MB). Free memory was 116.7 MB in the beginning and 163.2 MB in the end (delta: -46.4 MB). Peak memory consumption was 30.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,173 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 793.50 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 100.0 MB in the beginning and 172.8 MB in the end (delta: -72.7 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.74 ms. Allocated memory is still 205.0 MB. Free memory was 172.8 MB in the beginning and 169.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 875.56 ms. Allocated memory is still 205.0 MB. Free memory was 169.3 MB in the beginning and 117.4 MB in the end (delta: 51.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7582.05 ms. Allocated memory was 205.0 MB in the beginning and 282.1 MB in the end (delta: 77.1 MB). Free memory was 116.7 MB in the beginning and 163.2 MB in the end (delta: -46.4 MB). Peak memory consumption was 30.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1031]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L987] struct TSLL* null = malloc(sizeof(struct TSLL)); [L988] null->next = ((void*)0) [L989] null->prev = ((void*)0) [L990] null->colour = BLACK [L992] struct TSLL* list = malloc(sizeof(struct TSLL)); [L993] list->next = null [L994] list->prev = null [L995] list->colour = BLACK [L997] struct TSLL* end = list; [L1000] COND TRUE __VERIFIER_nondet_int() [L1003] end->next = malloc(sizeof(struct TSLL)) [L1004] EXPR end->next [L1004] end->next->prev = end [L1005] EXPR end->next [L1005] end = end->next [L1006] end->next = null [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1014] end->colour = RED [L1015] end->next = malloc(sizeof(struct TSLL)) [L1016] EXPR end->next [L1016] end->next->prev = end [L1017] EXPR end->next [L1017] end = end->next [L1018] end->next = null [L1019] end->colour = BLACK [L1021] EXPR end->colour [L1021] COND FALSE !(!(BLACK == end->colour)) [L1022] EXPR end->next [L1022] COND FALSE !(!(null == end->next)) [L1023] COND FALSE !(!(null != end)) [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND TRUE !(BLACK == end->colour) [L1031] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 7.4s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 287 SDtfs, 175 SDslu, 378 SDs, 0 SdLazy, 261 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred 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, 8 MinimizatonAttempts, 23 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 130 ConstructedInterpolants, 1 QuantifiedInterpolants, 15810 SizeOfPredicates, 37 NumberOfNonLiveVariables, 805 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 2/4 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...