/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:21:43,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:21:43,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:21:43,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:21:43,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:21:43,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:21:43,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:21:43,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:21:43,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:21:43,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:21:43,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:21:43,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:21:43,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:21:43,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:21:43,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:21:43,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:21:43,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:21:43,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:21:43,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:21:43,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:21:43,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:21:43,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:21:43,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:21:43,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:21:43,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:21:43,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:21:43,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:21:43,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:21:43,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:21:43,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:21:43,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:21:43,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:21:43,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:21:43,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:21:43,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:21:43,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:21:43,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:21:43,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:21:43,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:21:43,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:21:43,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:21:43,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:21:43,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:21:43,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:21:43,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:21:43,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:21:43,840 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:21:43,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:21:43,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:21:43,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:21:43,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:21:43,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:21:43,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:21:43,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:21:43,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:21:43,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:21:43,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:21:43,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:21:43,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:21:43,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:21:43,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:21:43,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:21:43,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:21:43,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:21:43,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:21:43,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:21:43,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:21:43,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:21:43,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:21:43,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:21:43,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:21:43,847 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:21:44,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:21:44,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:21:44,323 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:21:44,324 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:21:44,325 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:21:44,326 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-09-21 10:21:44,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4447b29b/f5aa3fab318c4764a5ff6c542ec138d5/FLAGdf6dd07de [2020-09-21 10:21:45,077 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:21:45,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-09-21 10:21:45,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4447b29b/f5aa3fab318c4764a5ff6c542ec138d5/FLAGdf6dd07de [2020-09-21 10:21:45,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4447b29b/f5aa3fab318c4764a5ff6c542ec138d5 [2020-09-21 10:21:45,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:21:45,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:21:45,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:45,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:21:45,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:21:45,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:45" (1/1) ... [2020-09-21 10:21:45,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db9ac37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:45, skipping insertion in model container [2020-09-21 10:21:45,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:45" (1/1) ... [2020-09-21 10:21:45,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:21:45,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:21:45,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:45,969 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:21:46,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:46,081 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:21:46,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46 WrapperNode [2020-09-21 10:21:46,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:46,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:21:46,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:21:46,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:21:46,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46" (1/1) ... [2020-09-21 10:21:46,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46" (1/1) ... [2020-09-21 10:21:46,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46" (1/1) ... [2020-09-21 10:21:46,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46" (1/1) ... [2020-09-21 10:21:46,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46" (1/1) ... [2020-09-21 10:21:46,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46" (1/1) ... [2020-09-21 10:21:46,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46" (1/1) ... [2020-09-21 10:21:46,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:21:46,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:21:46,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:21:46,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:21:46,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 10:21:46,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:21:46,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:21:46,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:21:46,267 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 10:21:46,267 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 10:21:46,267 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 10:21:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 10:21:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 10:21:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 10:21:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 10:21:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 10:21:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 10:21:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 10:21:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 10:21:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 10:21:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 10:21:46,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 10:21:46,270 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 10:21:46,270 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 10:21:46,272 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 10:21:46,272 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 10:21:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 10:21:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 10:21:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 10:21:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 10:21:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 10:21:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 10:21:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 10:21:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 10:21:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 10:21:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 10:21:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 10:21:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 10:21:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 10:21:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 10:21:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 10:21:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 10:21:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 10:21:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 10:21:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 10:21:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 10:21:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 10:21:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 10:21:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 10:21:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 10:21:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 10:21:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 10:21:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 10:21:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 10:21:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 10:21:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 10:21:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 10:21:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 10:21:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:21:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 10:21:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 10:21:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:21:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 10:21:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 10:21:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 10:21:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 10:21:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 10:21:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:21:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 10:21:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 10:21:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 10:21:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:21:46,282 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 10:21:46,282 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 10:21:46,282 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 10:21:46,283 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 10:21:46,283 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 10:21:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 10:21:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 10:21:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 10:21:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 10:21:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 10:21:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 10:21:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 10:21:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 10:21:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 10:21:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 10:21:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 10:21:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 10:21:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 10:21:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 10:21:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 10:21:46,288 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 10:21:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 10:21:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 10:21:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 10:21:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 10:21:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 10:21:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 10:21:46,290 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 10:21:46,290 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 10:21:46,290 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 10:21:46,290 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 10:21:46,290 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 10:21:46,290 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 10:21:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 10:21:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 10:21:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 10:21:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 10:21:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 10:21:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 10:21:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:21:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:21:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:21:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:21:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:21:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:21:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:21:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:21:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:21:46,997 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:21:46,998 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-09-21 10:21:47,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:47 BoogieIcfgContainer [2020-09-21 10:21:47,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:21:47,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:21:47,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:21:47,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:21:47,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:21:45" (1/3) ... [2020-09-21 10:21:47,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c8746e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:47, skipping insertion in model container [2020-09-21 10:21:47,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:46" (2/3) ... [2020-09-21 10:21:47,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c8746e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:47, skipping insertion in model container [2020-09-21 10:21:47,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:47" (3/3) ... [2020-09-21 10:21:47,019 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-09-21 10:21:47,031 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:21:47,043 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-09-21 10:21:47,067 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-09-21 10:21:47,107 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:21:47,108 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:21:47,108 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:21:47,112 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:21:47,112 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:21:47,113 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:21:47,113 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:21:47,113 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:21:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-09-21 10:21:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-21 10:21:47,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:47,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:47,169 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:47,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-09-21 10:21:47,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:47,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300605266] [2020-09-21 10:21:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:47,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:47,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300605266] [2020-09-21 10:21:47,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:47,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:21:47,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831612475] [2020-09-21 10:21:47,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:21:47,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:47,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:21:47,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:47,528 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-09-21 10:21:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:47,879 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-09-21 10:21:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:21:47,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-09-21 10:21:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:47,903 INFO L225 Difference]: With dead ends: 186 [2020-09-21 10:21:47,903 INFO L226 Difference]: Without dead ends: 99 [2020-09-21 10:21:47,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-21 10:21:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-09-21 10:21:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 10:21:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-09-21 10:21:47,979 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-09-21 10:21:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:47,979 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-09-21 10:21:47,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:21:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-09-21 10:21:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:21:47,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:47,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:47,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:21:47,981 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:47,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-09-21 10:21:47,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:47,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495991996] [2020-09-21 10:21:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:48,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:48,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495991996] [2020-09-21 10:21:48,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:48,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:21:48,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069529821] [2020-09-21 10:21:48,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:21:48,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:21:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:48,060 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-09-21 10:21:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:48,240 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-09-21 10:21:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:21:48,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-21 10:21:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:48,242 INFO L225 Difference]: With dead ends: 84 [2020-09-21 10:21:48,242 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 10:21:48,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 10:21:48,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-09-21 10:21:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-21 10:21:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-09-21 10:21:48,254 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-09-21 10:21:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:48,254 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-09-21 10:21:48,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:21:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-09-21 10:21:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:21:48,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:48,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:48,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:21:48,256 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:48,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-09-21 10:21:48,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:48,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784621718] [2020-09-21 10:21:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:48,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:48,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784621718] [2020-09-21 10:21:48,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:48,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:48,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535193582] [2020-09-21 10:21:48,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:48,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:48,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:48,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:48,336 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-09-21 10:21:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:48,569 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-09-21 10:21:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:21:48,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-21 10:21:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:48,571 INFO L225 Difference]: With dead ends: 138 [2020-09-21 10:21:48,571 INFO L226 Difference]: Without dead ends: 136 [2020-09-21 10:21:48,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-21 10:21:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-09-21 10:21:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-21 10:21:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-09-21 10:21:48,582 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-09-21 10:21:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:48,582 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-09-21 10:21:48,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-09-21 10:21:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:21:48,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:48,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:48,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:21:48,584 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-09-21 10:21:48,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:48,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111901169] [2020-09-21 10:21:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:48,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:48,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111901169] [2020-09-21 10:21:48,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:48,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:48,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014540004] [2020-09-21 10:21:48,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:48,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:48,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:48,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:48,692 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-09-21 10:21:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:48,887 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-09-21 10:21:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:48,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-21 10:21:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:48,889 INFO L225 Difference]: With dead ends: 84 [2020-09-21 10:21:48,889 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 10:21:48,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 10:21:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-09-21 10:21:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 10:21:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-09-21 10:21:48,897 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-09-21 10:21:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:48,897 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-09-21 10:21:48,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-09-21 10:21:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:21:48,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:48,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:48,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:21:48,899 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:48,900 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-09-21 10:21:48,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:48,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892895780] [2020-09-21 10:21:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:48,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:48,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892895780] [2020-09-21 10:21:48,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:48,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:48,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952618076] [2020-09-21 10:21:48,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:48,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:48,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:48,989 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-09-21 10:21:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:49,201 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-09-21 10:21:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:49,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-21 10:21:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:49,204 INFO L225 Difference]: With dead ends: 199 [2020-09-21 10:21:49,204 INFO L226 Difference]: Without dead ends: 132 [2020-09-21 10:21:49,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:49,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-21 10:21:49,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-09-21 10:21:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 10:21:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-09-21 10:21:49,225 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-09-21 10:21:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:49,227 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-09-21 10:21:49,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:49,228 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-09-21 10:21:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:21:49,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:49,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:49,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:21:49,229 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:49,229 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-09-21 10:21:49,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:49,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391504531] [2020-09-21 10:21:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:49,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:49,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391504531] [2020-09-21 10:21:49,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:49,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:21:49,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306015614] [2020-09-21 10:21:49,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:21:49,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:21:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:49,342 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-09-21 10:21:49,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:49,598 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-09-21 10:21:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:21:49,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-21 10:21:49,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:49,600 INFO L225 Difference]: With dead ends: 126 [2020-09-21 10:21:49,600 INFO L226 Difference]: Without dead ends: 122 [2020-09-21 10:21:49,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:21:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-21 10:21:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-09-21 10:21:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-21 10:21:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-09-21 10:21:49,609 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-09-21 10:21:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:49,609 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-09-21 10:21:49,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:21:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-09-21 10:21:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:21:49,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:49,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:49,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:21:49,611 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:49,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-09-21 10:21:49,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:49,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987153758] [2020-09-21 10:21:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:49,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:49,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987153758] [2020-09-21 10:21:49,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:49,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:21:49,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56127202] [2020-09-21 10:21:49,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:21:49,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:49,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:21:49,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:49,676 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-09-21 10:21:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:49,871 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-09-21 10:21:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:49,871 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-21 10:21:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:49,872 INFO L225 Difference]: With dead ends: 136 [2020-09-21 10:21:49,873 INFO L226 Difference]: Without dead ends: 116 [2020-09-21 10:21:49,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:21:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-21 10:21:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-21 10:21:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 10:21:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-09-21 10:21:49,880 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-09-21 10:21:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:49,881 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-09-21 10:21:49,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:21:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-09-21 10:21:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:21:49,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:49,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:49,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:21:49,883 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-09-21 10:21:49,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:49,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213916038] [2020-09-21 10:21:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:49,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:49,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213916038] [2020-09-21 10:21:49,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:49,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:21:49,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55889298] [2020-09-21 10:21:49,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:21:49,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:49,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:21:49,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:49,947 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-09-21 10:21:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:50,113 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-09-21 10:21:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:21:50,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-09-21 10:21:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:50,115 INFO L225 Difference]: With dead ends: 141 [2020-09-21 10:21:50,115 INFO L226 Difference]: Without dead ends: 100 [2020-09-21 10:21:50,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-21 10:21:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-09-21 10:21:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 10:21:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-09-21 10:21:50,122 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-09-21 10:21:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:50,122 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-09-21 10:21:50,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:21:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-09-21 10:21:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:21:50,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:50,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:50,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:21:50,124 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:50,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-09-21 10:21:50,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:50,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993548421] [2020-09-21 10:21:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:50,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:50,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993548421] [2020-09-21 10:21:50,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:50,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:21:50,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276874086] [2020-09-21 10:21:50,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:21:50,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:50,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:21:50,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:50,209 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-09-21 10:21:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:50,345 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-09-21 10:21:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:21:50,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-09-21 10:21:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:50,347 INFO L225 Difference]: With dead ends: 79 [2020-09-21 10:21:50,347 INFO L226 Difference]: Without dead ends: 77 [2020-09-21 10:21:50,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-21 10:21:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-21 10:21:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-21 10:21:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-09-21 10:21:50,354 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-09-21 10:21:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:50,354 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-09-21 10:21:50,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:21:50,354 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-09-21 10:21:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:21:50,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:50,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:50,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:21:50,356 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:50,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:50,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-09-21 10:21:50,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:50,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148865533] [2020-09-21 10:21:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:50,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:50,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148865533] [2020-09-21 10:21:50,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:50,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:50,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024467134] [2020-09-21 10:21:50,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:50,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:50,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:50,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:50,426 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-09-21 10:21:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:50,570 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-09-21 10:21:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:50,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-21 10:21:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:50,572 INFO L225 Difference]: With dead ends: 78 [2020-09-21 10:21:50,572 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 10:21:50,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:50,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 10:21:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-09-21 10:21:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-21 10:21:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-09-21 10:21:50,578 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-09-21 10:21:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:50,578 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-09-21 10:21:50,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-09-21 10:21:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:21:50,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:50,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:50,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:21:50,580 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-09-21 10:21:50,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:50,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060690646] [2020-09-21 10:21:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:50,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:50,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060690646] [2020-09-21 10:21:50,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:50,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:21:50,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581640487] [2020-09-21 10:21:50,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:21:50,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:50,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:21:50,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:50,664 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-09-21 10:21:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:51,009 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-09-21 10:21:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:21:51,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-09-21 10:21:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:51,012 INFO L225 Difference]: With dead ends: 179 [2020-09-21 10:21:51,012 INFO L226 Difference]: Without dead ends: 137 [2020-09-21 10:21:51,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:21:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-21 10:21:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-09-21 10:21:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-21 10:21:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-09-21 10:21:51,019 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-09-21 10:21:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:51,019 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-09-21 10:21:51,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:21:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-09-21 10:21:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:21:51,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:51,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:51,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:21:51,021 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:51,022 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-09-21 10:21:51,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:51,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331548560] [2020-09-21 10:21:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:51,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:51,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331548560] [2020-09-21 10:21:51,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:51,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:21:51,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117857901] [2020-09-21 10:21:51,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:21:51,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:51,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:21:51,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:21:51,344 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-09-21 10:21:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:52,211 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-09-21 10:21:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:21:52,212 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-09-21 10:21:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:52,218 INFO L225 Difference]: With dead ends: 182 [2020-09-21 10:21:52,218 INFO L226 Difference]: Without dead ends: 180 [2020-09-21 10:21:52,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:21:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-21 10:21:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-09-21 10:21:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-21 10:21:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-09-21 10:21:52,234 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-09-21 10:21:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:52,234 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-09-21 10:21:52,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:21:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-09-21 10:21:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 10:21:52,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:52,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:52,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:21:52,245 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:52,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-09-21 10:21:52,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:52,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453872641] [2020-09-21 10:21:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:52,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:21:52,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453872641] [2020-09-21 10:21:52,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:52,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:52,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894494612] [2020-09-21 10:21:52,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:52,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:52,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:52,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:52,337 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-09-21 10:21:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:52,539 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-09-21 10:21:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:21:52,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-21 10:21:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:52,540 INFO L225 Difference]: With dead ends: 150 [2020-09-21 10:21:52,541 INFO L226 Difference]: Without dead ends: 132 [2020-09-21 10:21:52,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-21 10:21:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-21 10:21:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-21 10:21:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-09-21 10:21:52,550 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-09-21 10:21:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:52,551 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-09-21 10:21:52,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-09-21 10:21:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 10:21:52,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:52,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:52,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:21:52,553 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-09-21 10:21:52,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:52,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081859480] [2020-09-21 10:21:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:52,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:21:52,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081859480] [2020-09-21 10:21:52,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:52,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:21:52,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483537146] [2020-09-21 10:21:52,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:21:52,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:21:52,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:52,614 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-09-21 10:21:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:52,761 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-09-21 10:21:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:21:52,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-09-21 10:21:52,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:52,763 INFO L225 Difference]: With dead ends: 124 [2020-09-21 10:21:52,763 INFO L226 Difference]: Without dead ends: 122 [2020-09-21 10:21:52,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:21:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-21 10:21:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-09-21 10:21:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-21 10:21:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-09-21 10:21:52,772 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-09-21 10:21:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:52,773 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-09-21 10:21:52,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:21:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-09-21 10:21:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:21:52,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:52,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:52,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:21:52,774 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:52,775 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-09-21 10:21:52,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:52,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031895473] [2020-09-21 10:21:52,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:21:52,794 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:21:52,794 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:21:52,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:21:52,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:21:52 BoogieIcfgContainer [2020-09-21 10:21:52,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:21:52,831 INFO L168 Benchmark]: Toolchain (without parser) took 7508.23 ms. Allocated memory was 147.8 MB in the beginning and 278.4 MB in the end (delta: 130.5 MB). Free memory was 103.1 MB in the beginning and 160.3 MB in the end (delta: -57.2 MB). Peak memory consumption was 73.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:52,832 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:21:52,833 INFO L168 Benchmark]: CACSL2BoogieTranslator took 755.50 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 102.5 MB in the beginning and 171.7 MB in the end (delta: -69.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:52,838 INFO L168 Benchmark]: Boogie Preprocessor took 106.58 ms. Allocated memory is still 205.0 MB. Free memory was 171.7 MB in the beginning and 168.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:52,843 INFO L168 Benchmark]: RCFGBuilder took 817.85 ms. Allocated memory is still 205.0 MB. Free memory was 168.4 MB in the beginning and 112.4 MB in the end (delta: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:52,846 INFO L168 Benchmark]: TraceAbstraction took 5818.48 ms. Allocated memory was 205.0 MB in the beginning and 278.4 MB in the end (delta: 73.4 MB). Free memory was 111.7 MB in the beginning and 160.3 MB in the end (delta: -48.6 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:52,850 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 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 755.50 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 102.5 MB in the beginning and 171.7 MB in the end (delta: -69.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.58 ms. Allocated memory is still 205.0 MB. Free memory was 171.7 MB in the beginning and 168.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 817.85 ms. Allocated memory is still 205.0 MB. Free memory was 168.4 MB in the beginning and 112.4 MB in the end (delta: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5818.48 ms. Allocated memory was 205.0 MB in the beginning and 278.4 MB in the end (delta: 73.4 MB). Free memory was 111.7 MB in the beginning and 160.3 MB in the end (delta: -48.6 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) [L995] COND FALSE !(!(list != ((void*)0))) [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list [L1015] COND FALSE !(!(((void*)0) != end)) [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner [L1023] COND TRUE len == 0 [L1024] len = 1 [L1027] COND FALSE !(!(((void*)0) != inner)) [L1028] EXPR inner->inner [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.6s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1016 SDtfs, 1075 SDslu, 1380 SDs, 0 SdLazy, 1834 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 367 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 49886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...