/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:59:25,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:59:25,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:59:25,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:59:25,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:59:25,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:59:25,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:59:25,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:59:25,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:59:25,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:59:25,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:59:25,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:59:25,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:59:25,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:59:25,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:59:25,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:59:25,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:59:25,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:59:25,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:59:25,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:59:25,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:59:25,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:59:25,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:59:25,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:59:25,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:59:25,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:59:25,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:59:25,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:59:25,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:59:25,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:59:25,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:59:25,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:59:25,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:59:25,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:59:25,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:59:25,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:59:25,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:59:25,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:59:25,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:59:25,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:59:25,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:59:25,191 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 [2020-09-24 14:59:25,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:59:25,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:59:25,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:59:25,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:59:25,223 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:59:25,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:59:25,223 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:59:25,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:59:25,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:59:25,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:59:25,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:59:25,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:59:25,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:59:25,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:59:25,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:59:25,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:59:25,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:59:25,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:59:25,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:59:25,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:59:25,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:59:25,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:59:25,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:59:25,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:59:25,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:59:25,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:59:25,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:59:25,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:59:25,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:59:25,228 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:59:25,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:59:25,737 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:59:25,742 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:59:25,744 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:59:25,744 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:59:25,747 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-24 14:59:25,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff60fbf65/b3e14dda03154a7984e9502b52f9c52e/FLAG99426951c [2020-09-24 14:59:26,490 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:59:26,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-24 14:59:26,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff60fbf65/b3e14dda03154a7984e9502b52f9c52e/FLAG99426951c [2020-09-24 14:59:26,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff60fbf65/b3e14dda03154a7984e9502b52f9c52e [2020-09-24 14:59:26,731 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:59:26,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:59:26,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:26,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:59:26,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:59:26,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:26" (1/1) ... [2020-09-24 14:59:26,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbca229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:26, skipping insertion in model container [2020-09-24 14:59:26,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:26" (1/1) ... [2020-09-24 14:59:26,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:59:26,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:59:27,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:27,378 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:59:27,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:27,490 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:59:27,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27 WrapperNode [2020-09-24 14:59:27,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:27,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:59:27,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:59:27,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:59:27,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27" (1/1) ... [2020-09-24 14:59:27,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27" (1/1) ... [2020-09-24 14:59:27,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27" (1/1) ... [2020-09-24 14:59:27,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27" (1/1) ... [2020-09-24 14:59:27,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27" (1/1) ... [2020-09-24 14:59:27,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27" (1/1) ... [2020-09-24 14:59:27,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27" (1/1) ... [2020-09-24 14:59:27,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:59:27,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:59:27,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:59:27,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:59:27,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27" (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 [2020-09-24 14:59:27,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:59:27,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:59:27,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 14:59:27,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 14:59:27,658 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 14:59:27,658 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:59:27,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:59:27,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:59:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 14:59:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 14:59:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 14:59:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 14:59:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 14:59:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 14:59:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 14:59:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 14:59:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 14:59:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 14:59:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 14:59:27,666 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 14:59:27,666 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 14:59:27,666 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 14:59:27,666 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 14:59:27,667 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 14:59:27,667 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 14:59:27,668 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 14:59:27,668 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 14:59:27,668 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 14:59:27,668 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 14:59:27,669 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 14:59:27,669 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 14:59:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 14:59:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 14:59:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 14:59:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 14:59:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 14:59:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 14:59:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 14:59:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 14:59:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 14:59:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 14:59:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 14:59:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 14:59:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 14:59:27,673 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 14:59:27,673 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 14:59:27,673 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 14:59:27,674 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 14:59:27,674 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 14:59:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 14:59:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 14:59:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 14:59:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 14:59:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 14:59:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 14:59:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 14:59:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 14:59:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 14:59:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 14:59:27,677 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 14:59:27,677 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 14:59:27,677 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 14:59:27,677 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 14:59:27,678 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 14:59:27,678 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 14:59:27,678 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 14:59:27,678 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 14:59:27,679 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 14:59:27,679 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 14:59:27,679 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 14:59:27,680 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 14:59:27,680 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 14:59:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 14:59:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 14:59:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 14:59:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 14:59:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 14:59:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 14:59:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 14:59:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 14:59:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 14:59:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 14:59:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 14:59:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 14:59:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 14:59:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 14:59:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 14:59:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 14:59:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 14:59:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 14:59:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 14:59:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 14:59:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 14:59:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 14:59:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 14:59:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 14:59:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 14:59:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 14:59:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 14:59:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 14:59:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 14:59:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 14:59:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 14:59:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 14:59:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 14:59:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 14:59:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 14:59:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 14:59:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 14:59:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 14:59:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 14:59:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 14:59:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 14:59:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 14:59:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:59:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 14:59:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 14:59:27,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 14:59:27,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:59:27,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:59:27,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:59:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:59:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:59:28,044 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 14:59:28,436 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:59:28,436 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-24 14:59:28,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:28 BoogieIcfgContainer [2020-09-24 14:59:28,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:59:28,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:59:28,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:59:28,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:59:28,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:59:26" (1/3) ... [2020-09-24 14:59:28,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea7a2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:28, skipping insertion in model container [2020-09-24 14:59:28,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:27" (2/3) ... [2020-09-24 14:59:28,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea7a2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:28, skipping insertion in model container [2020-09-24 14:59:28,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:28" (3/3) ... [2020-09-24 14:59:28,454 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-09-24 14:59:28,466 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:59:28,477 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:59:28,500 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:59:28,535 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:59:28,535 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:59:28,535 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:59:28,536 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:59:28,536 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:59:28,536 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:59:28,536 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:59:28,536 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:59:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2020-09-24 14:59:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 14:59:28,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:28,596 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] [2020-09-24 14:59:28,596 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:28,605 INFO L82 PathProgramCache]: Analyzing trace with hash -652445128, now seen corresponding path program 1 times [2020-09-24 14:59:28,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:28,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920249463] [2020-09-24 14:59:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:28,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:28,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920249463] [2020-09-24 14:59:28,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:28,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:59:28,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871085521] [2020-09-24 14:59:28,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:59:28,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:28,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:59:28,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:59:28,921 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 3 states. [2020-09-24 14:59:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:29,312 INFO L93 Difference]: Finished difference Result 342 states and 400 transitions. [2020-09-24 14:59:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:59:29,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 14:59:29,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:29,328 INFO L225 Difference]: With dead ends: 342 [2020-09-24 14:59:29,329 INFO L226 Difference]: Without dead ends: 166 [2020-09-24 14:59:29,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:59:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-24 14:59:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-09-24 14:59:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-24 14:59:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 183 transitions. [2020-09-24 14:59:29,401 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 183 transitions. Word has length 31 [2020-09-24 14:59:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:29,401 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 183 transitions. [2020-09-24 14:59:29,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:59:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 183 transitions. [2020-09-24 14:59:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 14:59:29,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:29,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:29,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:59:29,406 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:29,407 INFO L82 PathProgramCache]: Analyzing trace with hash 473660712, now seen corresponding path program 1 times [2020-09-24 14:59:29,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:29,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90164527] [2020-09-24 14:59:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:29,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:29,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90164527] [2020-09-24 14:59:29,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:29,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 14:59:29,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688418285] [2020-09-24 14:59:29,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:59:29,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:29,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:59:29,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:59:29,529 INFO L87 Difference]: Start difference. First operand 166 states and 183 transitions. Second operand 5 states. [2020-09-24 14:59:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:29,917 INFO L93 Difference]: Finished difference Result 251 states and 277 transitions. [2020-09-24 14:59:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:59:29,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-24 14:59:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:29,923 INFO L225 Difference]: With dead ends: 251 [2020-09-24 14:59:29,924 INFO L226 Difference]: Without dead ends: 201 [2020-09-24 14:59:29,925 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 [2020-09-24 14:59:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-24 14:59:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-09-24 14:59:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-24 14:59:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2020-09-24 14:59:29,945 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 41 [2020-09-24 14:59:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:29,946 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2020-09-24 14:59:29,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:59:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2020-09-24 14:59:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 14:59:29,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:29,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:29,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:59:29,950 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:29,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1870874818, now seen corresponding path program 1 times [2020-09-24 14:59:29,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:29,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892185798] [2020-09-24 14:59:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:30,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:30,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892185798] [2020-09-24 14:59:30,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:30,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:59:30,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133354212] [2020-09-24 14:59:30,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:59:30,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:30,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:59:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:59:30,088 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 4 states. [2020-09-24 14:59:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:30,378 INFO L93 Difference]: Finished difference Result 321 states and 359 transitions. [2020-09-24 14:59:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:59:30,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-09-24 14:59:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:30,381 INFO L225 Difference]: With dead ends: 321 [2020-09-24 14:59:30,381 INFO L226 Difference]: Without dead ends: 202 [2020-09-24 14:59:30,382 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 [2020-09-24 14:59:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-24 14:59:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-09-24 14:59:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-09-24 14:59:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions. [2020-09-24 14:59:30,397 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 54 [2020-09-24 14:59:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:30,398 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions. [2020-09-24 14:59:30,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:59:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions. [2020-09-24 14:59:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 14:59:30,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:30,401 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, 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] [2020-09-24 14:59:30,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:59:30,401 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:30,402 INFO L82 PathProgramCache]: Analyzing trace with hash 129316031, now seen corresponding path program 1 times [2020-09-24 14:59:30,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:30,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685333583] [2020-09-24 14:59:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:30,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:30,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685333583] [2020-09-24 14:59:30,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:30,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 14:59:30,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834069971] [2020-09-24 14:59:30,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:59:30,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:30,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:59:30,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:59:30,581 INFO L87 Difference]: Start difference. First operand 202 states and 224 transitions. Second operand 7 states. [2020-09-24 14:59:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:30,955 INFO L93 Difference]: Finished difference Result 279 states and 306 transitions. [2020-09-24 14:59:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:59:30,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-09-24 14:59:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:30,958 INFO L225 Difference]: With dead ends: 279 [2020-09-24 14:59:30,958 INFO L226 Difference]: Without dead ends: 273 [2020-09-24 14:59:30,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:59:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-24 14:59:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 215. [2020-09-24 14:59:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-24 14:59:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions. [2020-09-24 14:59:30,974 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 56 [2020-09-24 14:59:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:30,975 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions. [2020-09-24 14:59:30,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:59:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions. [2020-09-24 14:59:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 14:59:30,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:30,978 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:30,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:59:30,978 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:30,979 INFO L82 PathProgramCache]: Analyzing trace with hash 593034583, now seen corresponding path program 1 times [2020-09-24 14:59:30,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:30,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686318580] [2020-09-24 14:59:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:31,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:31,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686318580] [2020-09-24 14:59:31,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:31,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 14:59:31,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73195084] [2020-09-24 14:59:31,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:59:31,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:31,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:59:31,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:59:31,080 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand 7 states. [2020-09-24 14:59:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:31,559 INFO L93 Difference]: Finished difference Result 282 states and 309 transitions. [2020-09-24 14:59:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:59:31,560 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-09-24 14:59:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:31,563 INFO L225 Difference]: With dead ends: 282 [2020-09-24 14:59:31,563 INFO L226 Difference]: Without dead ends: 267 [2020-09-24 14:59:31,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:59:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-09-24 14:59:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 212. [2020-09-24 14:59:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-09-24 14:59:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2020-09-24 14:59:31,575 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 62 [2020-09-24 14:59:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:31,576 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2020-09-24 14:59:31,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:59:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2020-09-24 14:59:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 14:59:31,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:31,578 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:31,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:59:31,578 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:31,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1629716359, now seen corresponding path program 1 times [2020-09-24 14:59:31,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:31,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435451771] [2020-09-24 14:59:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:31,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:31,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435451771] [2020-09-24 14:59:31,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:31,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 14:59:31,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40257479] [2020-09-24 14:59:31,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:59:31,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:31,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:59:31,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:59:31,674 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand 7 states. [2020-09-24 14:59:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:32,033 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2020-09-24 14:59:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:59:32,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-09-24 14:59:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:32,036 INFO L225 Difference]: With dead ends: 264 [2020-09-24 14:59:32,036 INFO L226 Difference]: Without dead ends: 240 [2020-09-24 14:59:32,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:59:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-24 14:59:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 207. [2020-09-24 14:59:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-24 14:59:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2020-09-24 14:59:32,047 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 62 [2020-09-24 14:59:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:32,047 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2020-09-24 14:59:32,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:59:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2020-09-24 14:59:32,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 14:59:32,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:32,050 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:32,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:59:32,050 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:32,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:32,051 INFO L82 PathProgramCache]: Analyzing trace with hash 852438762, now seen corresponding path program 1 times [2020-09-24 14:59:32,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:32,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114832284] [2020-09-24 14:59:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:32,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:32,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114832284] [2020-09-24 14:59:32,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:32,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:59:32,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856565120] [2020-09-24 14:59:32,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:59:32,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:59:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:59:32,381 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand 15 states. [2020-09-24 14:59:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:33,416 INFO L93 Difference]: Finished difference Result 302 states and 330 transitions. [2020-09-24 14:59:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:59:33,417 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-24 14:59:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:33,420 INFO L225 Difference]: With dead ends: 302 [2020-09-24 14:59:33,420 INFO L226 Difference]: Without dead ends: 289 [2020-09-24 14:59:33,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:59:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-09-24 14:59:33,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 223. [2020-09-24 14:59:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-09-24 14:59:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 247 transitions. [2020-09-24 14:59:33,432 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 247 transitions. Word has length 67 [2020-09-24 14:59:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:33,432 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 247 transitions. [2020-09-24 14:59:33,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:59:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 247 transitions. [2020-09-24 14:59:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 14:59:33,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:33,434 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:33,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:59:33,435 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:33,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:33,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1742912072, now seen corresponding path program 1 times [2020-09-24 14:59:33,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:33,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178719426] [2020-09-24 14:59:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:33,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:33,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178719426] [2020-09-24 14:59:33,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:33,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:59:33,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397350705] [2020-09-24 14:59:33,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:59:33,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:33,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:59:33,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:59:33,741 INFO L87 Difference]: Start difference. First operand 223 states and 247 transitions. Second operand 15 states. [2020-09-24 14:59:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:34,884 INFO L93 Difference]: Finished difference Result 326 states and 357 transitions. [2020-09-24 14:59:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:59:34,885 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-24 14:59:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:34,888 INFO L225 Difference]: With dead ends: 326 [2020-09-24 14:59:34,888 INFO L226 Difference]: Without dead ends: 320 [2020-09-24 14:59:34,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:59:34,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-09-24 14:59:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 245. [2020-09-24 14:59:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-09-24 14:59:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 272 transitions. [2020-09-24 14:59:34,898 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 272 transitions. Word has length 67 [2020-09-24 14:59:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:34,899 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 272 transitions. [2020-09-24 14:59:34,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:59:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 272 transitions. [2020-09-24 14:59:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 14:59:34,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:34,901 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:34,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:59:34,901 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash -838472334, now seen corresponding path program 1 times [2020-09-24 14:59:34,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:34,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868907724] [2020-09-24 14:59:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:35,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:35,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868907724] [2020-09-24 14:59:35,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:35,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:59:35,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063886996] [2020-09-24 14:59:35,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:59:35,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:35,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:59:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:59:35,363 INFO L87 Difference]: Start difference. First operand 245 states and 272 transitions. Second operand 17 states. [2020-09-24 14:59:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:36,939 INFO L93 Difference]: Finished difference Result 310 states and 340 transitions. [2020-09-24 14:59:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:59:36,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-24 14:59:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:36,942 INFO L225 Difference]: With dead ends: 310 [2020-09-24 14:59:36,942 INFO L226 Difference]: Without dead ends: 304 [2020-09-24 14:59:36,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 14:59:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-24 14:59:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 249. [2020-09-24 14:59:36,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-24 14:59:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 276 transitions. [2020-09-24 14:59:36,953 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 276 transitions. Word has length 73 [2020-09-24 14:59:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:36,953 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 276 transitions. [2020-09-24 14:59:36,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:59:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 276 transitions. [2020-09-24 14:59:36,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 14:59:36,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:36,955 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:36,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:59:36,955 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:36,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1654345840, now seen corresponding path program 1 times [2020-09-24 14:59:36,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:36,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810031234] [2020-09-24 14:59:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:37,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:37,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810031234] [2020-09-24 14:59:37,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:37,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:59:37,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136368290] [2020-09-24 14:59:37,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:59:37,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:37,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:59:37,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:59:37,390 INFO L87 Difference]: Start difference. First operand 249 states and 276 transitions. Second operand 17 states. [2020-09-24 14:59:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:39,051 INFO L93 Difference]: Finished difference Result 324 states and 354 transitions. [2020-09-24 14:59:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:59:39,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-24 14:59:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:39,055 INFO L225 Difference]: With dead ends: 324 [2020-09-24 14:59:39,055 INFO L226 Difference]: Without dead ends: 318 [2020-09-24 14:59:39,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 14:59:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-09-24 14:59:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 258. [2020-09-24 14:59:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-24 14:59:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 286 transitions. [2020-09-24 14:59:39,065 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 286 transitions. Word has length 73 [2020-09-24 14:59:39,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:39,065 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 286 transitions. [2020-09-24 14:59:39,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:59:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 286 transitions. [2020-09-24 14:59:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 14:59:39,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:39,067 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:39,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:59:39,067 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:39,068 INFO L82 PathProgramCache]: Analyzing trace with hash -617664064, now seen corresponding path program 1 times [2020-09-24 14:59:39,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:39,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640736144] [2020-09-24 14:59:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:39,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:39,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640736144] [2020-09-24 14:59:39,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:39,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:59:39,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096348374] [2020-09-24 14:59:39,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:59:39,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:39,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:59:39,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:59:39,342 INFO L87 Difference]: Start difference. First operand 258 states and 286 transitions. Second operand 15 states. [2020-09-24 14:59:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:40,401 INFO L93 Difference]: Finished difference Result 341 states and 373 transitions. [2020-09-24 14:59:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:59:40,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-09-24 14:59:40,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:40,403 INFO L225 Difference]: With dead ends: 341 [2020-09-24 14:59:40,403 INFO L226 Difference]: Without dead ends: 322 [2020-09-24 14:59:40,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-09-24 14:59:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-24 14:59:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 258. [2020-09-24 14:59:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-24 14:59:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 285 transitions. [2020-09-24 14:59:40,415 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 285 transitions. Word has length 73 [2020-09-24 14:59:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:40,415 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 285 transitions. [2020-09-24 14:59:40,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:59:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 285 transitions. [2020-09-24 14:59:40,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 14:59:40,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:40,417 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-09-24 14:59:40,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:59:40,417 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:40,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:40,418 INFO L82 PathProgramCache]: Analyzing trace with hash 342604767, now seen corresponding path program 2 times [2020-09-24 14:59:40,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:40,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679732245] [2020-09-24 14:59:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:40,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679732245] [2020-09-24 14:59:40,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:40,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:59:40,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802553826] [2020-09-24 14:59:40,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:59:40,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:40,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:59:40,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:59:40,933 INFO L87 Difference]: Start difference. First operand 258 states and 285 transitions. Second operand 22 states. [2020-09-24 14:59:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:43,165 INFO L93 Difference]: Finished difference Result 346 states and 378 transitions. [2020-09-24 14:59:43,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-24 14:59:43,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-09-24 14:59:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:43,168 INFO L225 Difference]: With dead ends: 346 [2020-09-24 14:59:43,168 INFO L226 Difference]: Without dead ends: 340 [2020-09-24 14:59:43,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-09-24 14:59:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-24 14:59:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 283. [2020-09-24 14:59:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-09-24 14:59:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2020-09-24 14:59:43,179 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 78 [2020-09-24 14:59:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:43,179 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2020-09-24 14:59:43,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:59:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2020-09-24 14:59:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 14:59:43,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:43,181 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:43,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 14:59:43,181 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:43,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1736898641, now seen corresponding path program 1 times [2020-09-24 14:59:43,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:43,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080164920] [2020-09-24 14:59:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:43,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:43,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080164920] [2020-09-24 14:59:43,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:43,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:59:43,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22712469] [2020-09-24 14:59:43,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:59:43,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:59:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:59:43,776 INFO L87 Difference]: Start difference. First operand 283 states and 312 transitions. Second operand 22 states. [2020-09-24 14:59:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:45,899 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2020-09-24 14:59:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 14:59:45,900 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-09-24 14:59:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:45,902 INFO L225 Difference]: With dead ends: 383 [2020-09-24 14:59:45,903 INFO L226 Difference]: Without dead ends: 377 [2020-09-24 14:59:45,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 14:59:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-09-24 14:59:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 295. [2020-09-24 14:59:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-09-24 14:59:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 325 transitions. [2020-09-24 14:59:45,913 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 325 transitions. Word has length 78 [2020-09-24 14:59:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:45,914 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 325 transitions. [2020-09-24 14:59:45,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:59:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 325 transitions. [2020-09-24 14:59:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 14:59:45,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:45,915 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:45,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 14:59:45,916 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1698374602, now seen corresponding path program 1 times [2020-09-24 14:59:45,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:45,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560770639] [2020-09-24 14:59:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:46,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:46,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560770639] [2020-09-24 14:59:46,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:46,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:59:46,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563389072] [2020-09-24 14:59:46,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:59:46,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:46,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:59:46,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:59:46,348 INFO L87 Difference]: Start difference. First operand 295 states and 325 transitions. Second operand 17 states. [2020-09-24 14:59:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:47,913 INFO L93 Difference]: Finished difference Result 353 states and 386 transitions. [2020-09-24 14:59:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:59:47,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-09-24 14:59:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:47,916 INFO L225 Difference]: With dead ends: 353 [2020-09-24 14:59:47,917 INFO L226 Difference]: Without dead ends: 338 [2020-09-24 14:59:47,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 14:59:47,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-09-24 14:59:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 297. [2020-09-24 14:59:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-09-24 14:59:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 327 transitions. [2020-09-24 14:59:47,933 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 327 transitions. Word has length 79 [2020-09-24 14:59:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:47,933 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 327 transitions. [2020-09-24 14:59:47,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:59:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 327 transitions. [2020-09-24 14:59:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 14:59:47,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:47,935 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:47,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 14:59:47,936 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:47,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1559910918, now seen corresponding path program 2 times [2020-09-24 14:59:47,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:47,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460729339] [2020-09-24 14:59:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:48,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460729339] [2020-09-24 14:59:48,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:48,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:59:48,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830824175] [2020-09-24 14:59:48,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:59:48,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:48,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:59:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:59:48,463 INFO L87 Difference]: Start difference. First operand 297 states and 327 transitions. Second operand 17 states. [2020-09-24 14:59:50,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:50,031 INFO L93 Difference]: Finished difference Result 335 states and 367 transitions. [2020-09-24 14:59:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 14:59:50,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-09-24 14:59:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:50,034 INFO L225 Difference]: With dead ends: 335 [2020-09-24 14:59:50,034 INFO L226 Difference]: Without dead ends: 305 [2020-09-24 14:59:50,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 14:59:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-09-24 14:59:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 286. [2020-09-24 14:59:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-09-24 14:59:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 315 transitions. [2020-09-24 14:59:50,044 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 315 transitions. Word has length 79 [2020-09-24 14:59:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:50,044 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 315 transitions. [2020-09-24 14:59:50,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:59:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 315 transitions. [2020-09-24 14:59:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 14:59:50,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:50,046 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:50,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 14:59:50,046 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:50,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1643861864, now seen corresponding path program 2 times [2020-09-24 14:59:50,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:50,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994405286] [2020-09-24 14:59:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:50,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:50,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994405286] [2020-09-24 14:59:50,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:50,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:59:50,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395682032] [2020-09-24 14:59:50,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:59:50,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:59:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:59:50,529 INFO L87 Difference]: Start difference. First operand 286 states and 315 transitions. Second operand 17 states. [2020-09-24 14:59:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:52,314 INFO L93 Difference]: Finished difference Result 325 states and 355 transitions. [2020-09-24 14:59:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 14:59:52,314 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-09-24 14:59:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:52,317 INFO L225 Difference]: With dead ends: 325 [2020-09-24 14:59:52,317 INFO L226 Difference]: Without dead ends: 299 [2020-09-24 14:59:52,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 14:59:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-24 14:59:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 274. [2020-09-24 14:59:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-24 14:59:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 302 transitions. [2020-09-24 14:59:52,331 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 302 transitions. Word has length 79 [2020-09-24 14:59:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:52,332 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 302 transitions. [2020-09-24 14:59:52,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:59:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 302 transitions. [2020-09-24 14:59:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 14:59:52,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:52,333 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1] [2020-09-24 14:59:52,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 14:59:52,334 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1435872375, now seen corresponding path program 1 times [2020-09-24 14:59:52,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:52,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893608461] [2020-09-24 14:59:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:52,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:52,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893608461] [2020-09-24 14:59:52,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:52,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:59:52,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297027600] [2020-09-24 14:59:52,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:59:52,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:52,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:59:52,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:59:52,873 INFO L87 Difference]: Start difference. First operand 274 states and 302 transitions. Second operand 22 states. [2020-09-24 14:59:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:55,017 INFO L93 Difference]: Finished difference Result 352 states and 384 transitions. [2020-09-24 14:59:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 14:59:55,018 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-09-24 14:59:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:55,020 INFO L225 Difference]: With dead ends: 352 [2020-09-24 14:59:55,020 INFO L226 Difference]: Without dead ends: 337 [2020-09-24 14:59:55,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 14:59:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-09-24 14:59:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2020-09-24 14:59:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-09-24 14:59:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 319 transitions. [2020-09-24 14:59:55,030 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 319 transitions. Word has length 84 [2020-09-24 14:59:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:55,030 INFO L479 AbstractCegarLoop]: Abstraction has 290 states and 319 transitions. [2020-09-24 14:59:55,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:59:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 319 transitions. [2020-09-24 14:59:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 14:59:55,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:55,032 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1] [2020-09-24 14:59:55,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 14:59:55,032 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1822413145, now seen corresponding path program 3 times [2020-09-24 14:59:55,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:55,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197164414] [2020-09-24 14:59:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:55,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:55,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197164414] [2020-09-24 14:59:55,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:55,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 14:59:55,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519800372] [2020-09-24 14:59:55,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 14:59:55,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:55,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 14:59:55,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:59:55,996 INFO L87 Difference]: Start difference. First operand 290 states and 319 transitions. Second operand 25 states. [2020-09-24 14:59:58,031 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-09-24 14:59:59,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:59,817 INFO L93 Difference]: Finished difference Result 353 states and 385 transitions. [2020-09-24 14:59:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 14:59:59,818 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 84 [2020-09-24 14:59:59,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:59,820 INFO L225 Difference]: With dead ends: 353 [2020-09-24 14:59:59,821 INFO L226 Difference]: Without dead ends: 340 [2020-09-24 14:59:59,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=521, Invalid=2785, Unknown=0, NotChecked=0, Total=3306 [2020-09-24 14:59:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-24 14:59:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 299. [2020-09-24 14:59:59,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-09-24 14:59:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 328 transitions. [2020-09-24 14:59:59,831 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 328 transitions. Word has length 84 [2020-09-24 14:59:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:59,832 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 328 transitions. [2020-09-24 14:59:59,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 14:59:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 328 transitions. [2020-09-24 14:59:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 14:59:59,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:59,833 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:59,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 14:59:59,834 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:59,834 INFO L82 PathProgramCache]: Analyzing trace with hash 752503657, now seen corresponding path program 1 times [2020-09-24 14:59:59,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:59,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275074938] [2020-09-24 14:59:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:59:59,864 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:59:59,864 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:59:59,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 14:59:59,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:59:59 BoogieIcfgContainer [2020-09-24 14:59:59,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:59:59,896 INFO L168 Benchmark]: Toolchain (without parser) took 33162.85 ms. Allocated memory was 139.5 MB in the beginning and 503.8 MB in the end (delta: 364.4 MB). Free memory was 101.4 MB in the beginning and 380.4 MB in the end (delta: -279.0 MB). Peak memory consumption was 85.4 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:59,896 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 14:59:59,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 753.71 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.7 MB in the beginning and 165.8 MB in the end (delta: -65.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:59,898 INFO L168 Benchmark]: Boogie Preprocessor took 87.36 ms. Allocated memory is still 202.4 MB. Free memory was 165.8 MB in the beginning and 162.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:59,898 INFO L168 Benchmark]: RCFGBuilder took 862.73 ms. Allocated memory is still 202.4 MB. Free memory was 162.5 MB in the beginning and 95.9 MB in the end (delta: 66.6 MB). Peak memory consumption was 66.6 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:59,899 INFO L168 Benchmark]: TraceAbstraction took 31449.43 ms. Allocated memory was 202.4 MB in the beginning and 503.8 MB in the end (delta: 301.5 MB). Free memory was 95.2 MB in the beginning and 380.4 MB in the end (delta: -285.2 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:59,902 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 753.71 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.7 MB in the beginning and 165.8 MB in the end (delta: -65.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.36 ms. Allocated memory is still 202.4 MB. Free memory was 165.8 MB in the beginning and 162.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 862.73 ms. Allocated memory is still 202.4 MB. Free memory was 162.5 MB in the beginning and 95.9 MB in the end (delta: 66.6 MB). Peak memory consumption was 66.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31449.43 ms. Allocated memory was 202.4 MB in the beginning and 503.8 MB in the end (delta: 301.5 MB). Free memory was 95.2 MB in the beginning and 380.4 MB in the end (delta: -285.2 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 188 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 31.3s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 24.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3258 SDtfs, 5763 SDslu, 26153 SDs, 0 SdLazy, 11299 SolverSat, 762 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 542 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 15.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=299occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 779 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 1304 NumberOfCodeBlocks, 1304 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1202 ConstructedInterpolants, 0 QuantifiedInterpolants, 559211 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 42/119 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...