/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/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:22:12,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:22:12,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:22:12,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:22:12,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:22:12,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:22:12,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:22:12,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:22:12,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:22:12,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:22:12,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:22:12,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:22:12,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:22:12,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:22:12,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:22:12,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:22:12,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:22:12,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:22:12,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:22:12,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:22:12,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:22:12,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:22:12,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:22:12,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:22:12,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:22:12,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:22:12,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:22:12,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:22:12,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:22:12,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:22:12,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:22:12,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:22:12,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:22:12,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:22:12,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:22:12,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:22:12,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:22:12,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:22:12,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:22:12,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:22:12,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:22:12,855 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 10:22:12,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:22:12,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:22:12,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:22:12,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:22:12,903 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:22:12,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:22:12,903 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:22:12,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:22:12,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:22:12,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:22:12,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:22:12,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:22:12,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:22:12,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:22:12,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:22:12,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:22:12,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:22:12,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:22:12,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:22:12,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:22:12,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:22:12,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:22:12,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:22:12,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:22:12,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:22:12,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:22:12,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:22:12,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:22:12,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:22:12,909 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 10:22:13,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:22:13,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:22:13,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:22:13,394 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:22:13,394 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:22:13,396 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-21 10:22:13,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d55dc48c0/aa29836f7668404bab7d1fc02dcd3e93/FLAG0c4072612 [2020-09-21 10:22:14,133 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:22:14,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-21 10:22:14,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d55dc48c0/aa29836f7668404bab7d1fc02dcd3e93/FLAG0c4072612 [2020-09-21 10:22:14,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d55dc48c0/aa29836f7668404bab7d1fc02dcd3e93 [2020-09-21 10:22:14,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:22:14,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:22:14,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:22:14,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:22:14,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:22:14,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:22:14" (1/1) ... [2020-09-21 10:22:14,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3a7124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:14, skipping insertion in model container [2020-09-21 10:22:14,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:22:14" (1/1) ... [2020-09-21 10:22:14,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:22:14,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:22:15,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:22:15,041 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:22:15,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:22:15,148 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:22:15,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15 WrapperNode [2020-09-21 10:22:15,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:22:15,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:22:15,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:22:15,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:22:15,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15" (1/1) ... [2020-09-21 10:22:15,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15" (1/1) ... [2020-09-21 10:22:15,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15" (1/1) ... [2020-09-21 10:22:15,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15" (1/1) ... [2020-09-21 10:22:15,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15" (1/1) ... [2020-09-21 10:22:15,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15" (1/1) ... [2020-09-21 10:22:15,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15" (1/1) ... [2020-09-21 10:22:15,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:22:15,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:22:15,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:22:15,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:22:15,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15" (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 10:22:15,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:22:15,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:22:15,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 10:22:15,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 10:22:15,302 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 10:22:15,302 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-21 10:22:15,302 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-21 10:22:15,303 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-21 10:22:15,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:22:15,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:22:15,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:22:15,304 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 10:22:15,304 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 10:22:15,304 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 10:22:15,304 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 10:22:15,304 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 10:22:15,305 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 10:22:15,305 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 10:22:15,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 10:22:15,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 10:22:15,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 10:22:15,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 10:22:15,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 10:22:15,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 10:22:15,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 10:22:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 10:22:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 10:22:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 10:22:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 10:22:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 10:22:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 10:22:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 10:22:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 10:22:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 10:22:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 10:22:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 10:22:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 10:22:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 10:22:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 10:22:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 10:22:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 10:22:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 10:22:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 10:22:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 10:22:15,310 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 10:22:15,310 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 10:22:15,310 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 10:22:15,310 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 10:22:15,310 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 10:22:15,310 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 10:22:15,310 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 10:22:15,311 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 10:22:15,311 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 10:22:15,311 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 10:22:15,311 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 10:22:15,311 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 10:22:15,311 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 10:22:15,312 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 10:22:15,312 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 10:22:15,312 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 10:22:15,312 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 10:22:15,312 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 10:22:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 10:22:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:22:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 10:22:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 10:22:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:22:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 10:22:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 10:22:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 10:22:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 10:22:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 10:22:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:22:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 10:22:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 10:22:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 10:22:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:22:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 10:22:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 10:22:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 10:22:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 10:22:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 10:22:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 10:22:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 10:22:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 10:22:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 10:22:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 10:22:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 10:22:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 10:22:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 10:22:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 10:22:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 10:22:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 10:22:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 10:22:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 10:22:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 10:22:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 10:22:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 10:22:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 10:22:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 10:22:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 10:22:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 10:22:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 10:22:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 10:22:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 10:22:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 10:22:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 10:22:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 10:22:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 10:22:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 10:22:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 10:22:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 10:22:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 10:22:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 10:22:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 10:22:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 10:22:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 10:22:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-21 10:22:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:22:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:22:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-21 10:22:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:22:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-21 10:22:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:22:15,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:22:15,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:22:15,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:22:15,639 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 10:22:15,858 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:22:15,859 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 10:22:15,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:22:15 BoogieIcfgContainer [2020-09-21 10:22:15,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:22:15,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:22:15,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:22:15,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:22:15,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:22:14" (1/3) ... [2020-09-21 10:22:15,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f94f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:22:15, skipping insertion in model container [2020-09-21 10:22:15,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:15" (2/3) ... [2020-09-21 10:22:15,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f94f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:22:15, skipping insertion in model container [2020-09-21 10:22:15,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:22:15" (3/3) ... [2020-09-21 10:22:15,875 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-09-21 10:22:15,887 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:22:15,895 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:22:15,914 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:22:15,941 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:22:15,941 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:22:15,941 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:22:15,942 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:22:15,942 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:22:15,942 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:22:15,942 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:22:15,942 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:22:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-09-21 10:22:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:22:15,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:15,976 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] [2020-09-21 10:22:15,977 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-09-21 10:22:15,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:15,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673291350] [2020-09-21 10:22:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:22:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:22:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,246 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 10:22:16,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673291350] [2020-09-21 10:22:16,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:16,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:22:16,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026303349] [2020-09-21 10:22:16,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:22:16,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:16,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:22:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:22:16,276 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-09-21 10:22:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:16,515 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-09-21 10:22:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:22:16,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-09-21 10:22:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:16,530 INFO L225 Difference]: With dead ends: 90 [2020-09-21 10:22:16,530 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 10:22:16,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:22:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 10:22:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-09-21 10:22:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 10:22:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-09-21 10:22:16,595 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-09-21 10:22:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:16,595 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-09-21 10:22:16,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:22:16,596 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-09-21 10:22:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:22:16,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:16,597 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 10:22:16,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:22:16,597 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-09-21 10:22:16,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:16,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638725756] [2020-09-21 10:22:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:22:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:22:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,777 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 10:22:16,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638725756] [2020-09-21 10:22:16,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:16,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:22:16,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323645757] [2020-09-21 10:22:16,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:22:16,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:16,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:22:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:22:16,782 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-09-21 10:22:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:16,983 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-21 10:22:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:22:16,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-21 10:22:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:16,985 INFO L225 Difference]: With dead ends: 45 [2020-09-21 10:22:16,985 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 10:22:16,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:22:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 10:22:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-09-21 10:22:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 10:22:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-09-21 10:22:16,995 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-09-21 10:22:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:16,995 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-09-21 10:22:16,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:22:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-09-21 10:22:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:22:16,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:16,997 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 10:22:16,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:22:16,997 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:16,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:16,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-09-21 10:22:16,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:16,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149726364] [2020-09-21 10:22:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:22:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:22:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:17,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149726364] [2020-09-21 10:22:17,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:17,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:22:17,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095977796] [2020-09-21 10:22:17,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:22:17,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:22:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:22:17,181 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-09-21 10:22:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:17,369 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-09-21 10:22:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:22:17,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-21 10:22:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:17,371 INFO L225 Difference]: With dead ends: 48 [2020-09-21 10:22:17,371 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 10:22:17,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:22:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 10:22:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-21 10:22:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 10:22:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-21 10:22:17,380 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-09-21 10:22:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:17,380 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-21 10:22:17,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:22:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-21 10:22:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:22:17,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:17,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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 10:22:17,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:22:17,383 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1166508097, now seen corresponding path program 2 times [2020-09-21 10:22:17,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:17,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80211738] [2020-09-21 10:22:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:22:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:22:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:17,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80211738] [2020-09-21 10:22:17,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:17,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:22:17,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212476433] [2020-09-21 10:22:17,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:22:17,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:17,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:22:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:22:17,643 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-09-21 10:22:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:17,851 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-21 10:22:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:22:17,852 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-21 10:22:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:17,853 INFO L225 Difference]: With dead ends: 51 [2020-09-21 10:22:17,853 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 10:22:17,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:22:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 10:22:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-09-21 10:22:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 10:22:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-09-21 10:22:17,862 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2020-09-21 10:22:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:17,862 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-09-21 10:22:17,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:22:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-09-21 10:22:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 10:22:17,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:17,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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 10:22:17,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:22:17,864 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1706812894, now seen corresponding path program 3 times [2020-09-21 10:22:17,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:17,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036703077] [2020-09-21 10:22:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:17,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:22:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:18,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 10:22:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 10:22:18,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036703077] [2020-09-21 10:22:18,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:18,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 10:22:18,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982444789] [2020-09-21 10:22:18,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:22:18,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:22:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:22:18,081 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2020-09-21 10:22:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:18,388 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-09-21 10:22:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:22:18,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-09-21 10:22:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:18,390 INFO L225 Difference]: With dead ends: 43 [2020-09-21 10:22:18,390 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 10:22:18,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:22:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 10:22:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-21 10:22:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 10:22:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-21 10:22:18,405 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2020-09-21 10:22:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:18,406 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-21 10:22:18,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:22:18,406 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-21 10:22:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 10:22:18,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:18,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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 10:22:18,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:22:18,411 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash 991320762, now seen corresponding path program 1 times [2020-09-21 10:22:18,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:18,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684927216] [2020-09-21 10:22:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:18,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:22:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:18,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 10:22:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:18,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684927216] [2020-09-21 10:22:18,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:18,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:22:18,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289729602] [2020-09-21 10:22:18,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:22:18,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:22:18,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:22:18,672 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-09-21 10:22:19,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:19,119 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-09-21 10:22:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:22:19,120 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-09-21 10:22:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:19,121 INFO L225 Difference]: With dead ends: 44 [2020-09-21 10:22:19,121 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 10:22:19,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:22:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 10:22:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-21 10:22:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 10:22:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-09-21 10:22:19,129 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2020-09-21 10:22:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:19,129 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-09-21 10:22:19,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:22:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-09-21 10:22:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 10:22:19,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:19,131 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 10:22:19,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:22:19,131 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 2 times [2020-09-21 10:22:19,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:19,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457306743] [2020-09-21 10:22:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:19,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:19,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:22:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:19,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 10:22:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 10:22:19,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457306743] [2020-09-21 10:22:19,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:19,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:22:19,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790073857] [2020-09-21 10:22:19,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:22:19,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:19,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:22:19,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:22:19,329 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-09-21 10:22:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:19,655 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-09-21 10:22:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:22:19,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-21 10:22:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:19,659 INFO L225 Difference]: With dead ends: 55 [2020-09-21 10:22:19,659 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 10:22:19,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:22:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 10:22:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-09-21 10:22:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 10:22:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-09-21 10:22:19,670 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2020-09-21 10:22:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:19,670 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-09-21 10:22:19,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:22:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-09-21 10:22:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:22:19,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:19,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 10:22:19,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:22:19,673 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:19,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 3 times [2020-09-21 10:22:19,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:19,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245920112] [2020-09-21 10:22:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:22:19,704 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:22:19,704 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:22:19,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:22:19,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:22:19 BoogieIcfgContainer [2020-09-21 10:22:19,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:22:19,736 INFO L168 Benchmark]: Toolchain (without parser) took 5313.83 ms. Allocated memory was 148.9 MB in the beginning and 274.7 MB in the end (delta: 125.8 MB). Free memory was 102.0 MB in the beginning and 222.0 MB in the end (delta: -120.0 MB). Peak memory consumption was 5.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:19,737 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:22:19,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 723.00 ms. Allocated memory was 148.9 MB in the beginning and 207.1 MB in the end (delta: 58.2 MB). Free memory was 101.3 MB in the beginning and 173.8 MB in the end (delta: -72.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:19,739 INFO L168 Benchmark]: Boogie Preprocessor took 71.53 ms. Allocated memory is still 207.1 MB. Free memory was 173.8 MB in the beginning and 171.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:19,740 INFO L168 Benchmark]: RCFGBuilder took 643.04 ms. Allocated memory is still 207.1 MB. Free memory was 171.0 MB in the beginning and 127.5 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:19,740 INFO L168 Benchmark]: TraceAbstraction took 3866.60 ms. Allocated memory was 207.1 MB in the beginning and 274.7 MB in the end (delta: 67.6 MB). Free memory was 127.5 MB in the beginning and 222.0 MB in the end (delta: -94.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:22:19,744 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 723.00 ms. Allocated memory was 148.9 MB in the beginning and 207.1 MB in the end (delta: 58.2 MB). Free memory was 101.3 MB in the beginning and 173.8 MB in the end (delta: -72.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.53 ms. Allocated memory is still 207.1 MB. Free memory was 173.8 MB in the beginning and 171.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 643.04 ms. Allocated memory is still 207.1 MB. Free memory was 171.0 MB in the beginning and 127.5 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3866.60 ms. Allocated memory was 207.1 MB in the beginning and 274.7 MB in the end (delta: 67.6 MB). Free memory was 127.5 MB in the beginning and 222.0 MB in the end (delta: -94.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] RET, EXPR sll_create(len + 1) [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) [L577] int len = 0; [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) [L582] return len; [L597] RET, EXPR sll_length(s) [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 300 SDslu, 499 SDs, 0 SdLazy, 896 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 205 ConstructedInterpolants, 0 QuantifiedInterpolants, 20626 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 33/46 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...