/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-manipulation/tree-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:12:42,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:12:42,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:12:42,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:12:42,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:12:42,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:12:42,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:12:42,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:12:42,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:12:42,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:12:42,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:12:42,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:12:42,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:12:42,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:12:42,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:12:42,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:12:42,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:12:42,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:12:42,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:12:42,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:12:42,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:12:42,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:12:42,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:12:42,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:12:42,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:12:42,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:12:42,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:12:42,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:12:42,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:12:42,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:12:42,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:12:42,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:12:42,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:12:42,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:12:42,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:12:42,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:12:42,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:12:42,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:12:42,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:12:42,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:12:42,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:12:42,132 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 [2020-10-27 01:12:42,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:12:42,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:12:42,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:12:42,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:12:42,175 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:12:42,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:12:42,175 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:12:42,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:12:42,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:12:42,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:12:42,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:12:42,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:12:42,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:12:42,181 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:12:42,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:12:42,182 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:12:42,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:12:42,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:12:42,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:12:42,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:12:42,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:12:42,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:12:42,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:12:42,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:12:42,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:12:42,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:12:42,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:12:42,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:12:42,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:12:42,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:12:42,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:12:42,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:12:42,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:12:42,665 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:12:42,666 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:12:42,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/tree-2.i [2020-10-27 01:12:42,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f8bb67f0/d6d81f7abb9e4fc487742fb01d512e32/FLAGbd84e4ab2 [2020-10-27 01:12:43,574 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:12:43,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/tree-2.i [2020-10-27 01:12:43,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f8bb67f0/d6d81f7abb9e4fc487742fb01d512e32/FLAGbd84e4ab2 [2020-10-27 01:12:43,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f8bb67f0/d6d81f7abb9e4fc487742fb01d512e32 [2020-10-27 01:12:43,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:12:43,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:12:43,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:12:43,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:12:43,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:12:43,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:12:43" (1/1) ... [2020-10-27 01:12:43,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267181d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:43, skipping insertion in model container [2020-10-27 01:12:43,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:12:43" (1/1) ... [2020-10-27 01:12:43,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:12:43,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:12:44,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:12:44,340 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:12:44,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:12:44,537 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:12:44,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44 WrapperNode [2020-10-27 01:12:44,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:12:44,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:12:44,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:12:44,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:12:44,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44" (1/1) ... [2020-10-27 01:12:44,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44" (1/1) ... [2020-10-27 01:12:44,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44" (1/1) ... [2020-10-27 01:12:44,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44" (1/1) ... [2020-10-27 01:12:44,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44" (1/1) ... [2020-10-27 01:12:44,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44" (1/1) ... [2020-10-27 01:12:44,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44" (1/1) ... [2020-10-27 01:12:44,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:12:44,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:12:44,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:12:44,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:12:44,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44" (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 [2020-10-27 01:12:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:12:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:12:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:12:44,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:12:44,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:12:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-27 01:12:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2020-10-27 01:12:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2020-10-27 01:12:44,797 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2020-10-27 01:12:44,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:12:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:12:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:12:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:12:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:12:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:12:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:12:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:12:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:12:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:12:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:12:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:12:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:12:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:12:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:12:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:12:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:12:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:12:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:12:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:12:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:12:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:12:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:12:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:12:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:12:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:12:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:12:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:12:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:12:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:12:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:12:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:12:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:12:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:12:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:12:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:12:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:12:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:12:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:12:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:12:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:12:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:12:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:12:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:12:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:12:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:12:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:12:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:12:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:12:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:12:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:12:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:12:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:12:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:12:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:12:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:12:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:12:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:12:44,814 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:12:44,814 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:12:44,814 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:12:44,815 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:12:44,815 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:12:44,817 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:12:44,817 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:12:44,818 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:12:44,818 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:12:44,818 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:12:44,819 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:12:44,819 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:12:44,819 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:12:44,819 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:12:44,820 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:12:44,821 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:12:44,821 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:12:44,821 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:12:44,821 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:12:44,822 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:12:44,822 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:12:44,822 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:12:44,822 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:12:44,822 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:12:44,822 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:12:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:12:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:12:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:12:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:12:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:12:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:12:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:12:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:12:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:12:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:12:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:12:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:12:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:12:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:12:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:12:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:12:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:12:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:12:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:12:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:12:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:12:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:12:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:12:44,827 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:12:44,828 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:12:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:12:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-27 01:12:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2020-10-27 01:12:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:12:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:12:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2020-10-27 01:12:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:12:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:12:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:12:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2020-10-27 01:12:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:12:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:12:44,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:12:44,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:12:44,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:12:45,670 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:12:45,671 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 01:12:45,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:12:45 BoogieIcfgContainer [2020-10-27 01:12:45,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:12:45,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:12:45,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:12:45,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:12:45,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:12:43" (1/3) ... [2020-10-27 01:12:45,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18959b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:12:45, skipping insertion in model container [2020-10-27 01:12:45,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:44" (2/3) ... [2020-10-27 01:12:45,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18959b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:12:45, skipping insertion in model container [2020-10-27 01:12:45,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:12:45" (3/3) ... [2020-10-27 01:12:45,684 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-2.i [2020-10-27 01:12:45,697 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:12:45,706 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:12:45,722 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:12:45,752 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:12:45,752 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:12:45,752 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:12:45,752 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:12:45,752 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:12:45,753 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:12:45,753 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:12:45,753 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:12:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-10-27 01:12:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:12:45,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:45,783 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] [2020-10-27 01:12:45,783 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:45,791 INFO L82 PathProgramCache]: Analyzing trace with hash -840089546, now seen corresponding path program 1 times [2020-10-27 01:12:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:45,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007694814] [2020-10-27 01:12:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:45,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:46,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:46,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:46,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:46,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:46,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:12:46,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:12:46,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-27 01:12:46,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:46,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:12:46,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:12:46,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:12:46,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:12:47,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:47,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:47,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:47,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:47,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:47,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:12:47,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:47,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:47,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:47,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:47,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:47,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:12:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:47,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:47,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:47,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:47,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:47,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 01:12:47,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:12:47,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 01:12:47,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:47,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:12:47,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:47,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:12:47,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:47,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007694814] [2020-10-27 01:12:47,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:12:47,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:12:47,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428120663] [2020-10-27 01:12:47,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:12:47,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:12:47,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:12:47,166 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 8 states. [2020-10-27 01:12:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:47,842 INFO L93 Difference]: Finished difference Result 148 states and 225 transitions. [2020-10-27 01:12:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:12:47,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:12:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:47,854 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:12:47,854 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:12:47,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:12:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:12:47,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 01:12:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:12:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-27 01:12:47,910 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 21 [2020-10-27 01:12:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:47,911 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-27 01:12:47,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:12:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-27 01:12:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:12:47,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:47,912 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] [2020-10-27 01:12:47,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:12:47,913 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:47,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:47,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1926558085, now seen corresponding path program 1 times [2020-10-27 01:12:47,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:47,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393541654] [2020-10-27 01:12:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:47,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:47,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:47,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:48,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:48,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:48,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:49,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:49,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:12:49,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:12:49,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1158 [2020-10-27 01:12:49,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:12:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:12:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:12:49,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:49,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:49,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:49,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:49,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:49,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:12:49,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:49,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:49,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:49,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:49,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:49,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:12:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:49,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:49,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:49,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:12:49,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:12:49,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 01:12:49,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:12:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-27 01:12:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:12:49,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:49,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393541654] [2020-10-27 01:12:49,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:12:49,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:12:49,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522963103] [2020-10-27 01:12:49,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:12:49,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:49,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:12:49,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:12:49,250 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 5 states. [2020-10-27 01:12:49,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:49,483 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-27 01:12:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:12:49,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-27 01:12:49,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:49,485 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:12:49,485 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:12:49,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:12:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:12:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-27 01:12:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:12:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 01:12:49,512 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 28 [2020-10-27 01:12:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:49,512 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 01:12:49,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:12:49,513 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 01:12:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:12:49,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:49,515 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] [2020-10-27 01:12:49,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:12:49,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1198531180, now seen corresponding path program 1 times [2020-10-27 01:12:49,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:49,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070117152] [2020-10-27 01:12:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:49,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:49,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:49,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:49,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:50,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:51,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:51,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:12:51,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:12:51,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1598 [2020-10-27 01:12:51,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:51,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:12:51,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:12:51,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:12:51,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:51,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:51,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:51,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:51,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:51,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:51,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:12:51,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:51,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:51,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:12:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:51,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:51,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:51,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:12:51,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:51,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 01:12:51,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:12:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:12:51,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:12:51,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070117152] [2020-10-27 01:12:51,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:12:51,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 01:12:51,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172419382] [2020-10-27 01:12:51,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:12:51,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:51,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:12:51,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:12:51,532 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 11 states. [2020-10-27 01:12:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:52,126 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-27 01:12:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:12:52,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:12:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:52,128 INFO L225 Difference]: With dead ends: 95 [2020-10-27 01:12:52,128 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:12:52,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:12:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:12:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-10-27 01:12:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:12:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-27 01:12:52,140 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 31 [2020-10-27 01:12:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:52,141 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-27 01:12:52,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:12:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-27 01:12:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:12:52,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:52,144 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] [2020-10-27 01:12:52,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:12:52,144 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:52,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1270924478, now seen corresponding path program 1 times [2020-10-27 01:12:52,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:52,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996709363] [2020-10-27 01:12:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:52,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:52,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:52,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:12:52,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:52,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-27 01:12:52,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:12:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:12:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:12:52,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:52,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:52,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:52,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:52,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:52,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:52,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:12:52,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:52,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:52,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:52,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:52,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:52,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:12:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:52,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:53,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:53,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:12:53,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:53,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-27 01:12:53,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:12:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:12:53,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:53,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996709363] [2020-10-27 01:12:53,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:53,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:12:53,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578982624] [2020-10-27 01:12:53,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:12:53,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:53,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:12:53,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:12:53,380 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 14 states. [2020-10-27 01:12:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:54,291 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-10-27 01:12:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:12:54,291 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 01:12:54,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:54,293 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:12:54,293 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:12:54,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:12:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:12:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2020-10-27 01:12:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:12:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-27 01:12:54,314 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 36 [2020-10-27 01:12:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:54,314 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-27 01:12:54,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:12:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-27 01:12:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:12:54,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:54,316 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] [2020-10-27 01:12:54,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:12:54,316 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:54,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1862725360, now seen corresponding path program 1 times [2020-10-27 01:12:54,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:54,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227729700] [2020-10-27 01:12:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:54,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:54,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:54,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:12:54,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:54,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-27 01:12:54,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:54,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:12:54,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:12:54,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:12:54,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:54,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:54,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:54,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:54,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:54,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:54,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:12:54,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:54,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:54,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:54,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:54,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:54,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:12:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:54,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:55,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:55,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:12:55,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:55,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 01:12:55,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:55,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:12:55,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:55,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:12:55,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:55,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227729700] [2020-10-27 01:12:55,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:55,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:12:55,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743094526] [2020-10-27 01:12:55,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:12:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:12:55,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:12:55,270 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 14 states. [2020-10-27 01:12:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:56,111 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-27 01:12:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:12:56,111 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 01:12:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:56,113 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:12:56,113 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:12:56,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:12:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:12:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-27 01:12:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:12:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-27 01:12:56,125 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 36 [2020-10-27 01:12:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:56,126 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-27 01:12:56,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:12:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-27 01:12:56,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:12:56,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:56,128 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] [2020-10-27 01:12:56,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:12:56,128 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:56,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1540410782, now seen corresponding path program 1 times [2020-10-27 01:12:56,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:56,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110788875] [2020-10-27 01:12:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:12:56,159 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:12:56,159 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:12:56,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:12:56,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:12:56 BoogieIcfgContainer [2020-10-27 01:12:56,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:12:56,187 INFO L168 Benchmark]: Toolchain (without parser) took 12400.02 ms. Allocated memory was 153.1 MB in the beginning and 269.5 MB in the end (delta: 116.4 MB). Free memory was 127.5 MB in the beginning and 96.0 MB in the end (delta: 31.5 MB). Peak memory consumption was 149.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:12:56,187 INFO L168 Benchmark]: CDTParser took 0.82 ms. Allocated memory is still 153.1 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:12:56,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 737.56 ms. Allocated memory is still 153.1 MB. Free memory was 126.9 MB in the beginning and 103.9 MB in the end (delta: 22.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:12:56,189 INFO L168 Benchmark]: Boogie Preprocessor took 124.48 ms. Allocated memory is still 153.1 MB. Free memory was 103.9 MB in the beginning and 100.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:12:56,190 INFO L168 Benchmark]: RCFGBuilder took 1008.43 ms. Allocated memory is still 153.1 MB. Free memory was 100.9 MB in the beginning and 88.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2020-10-27 01:12:56,191 INFO L168 Benchmark]: TraceAbstraction took 10508.36 ms. Allocated memory was 153.1 MB in the beginning and 269.5 MB in the end (delta: 116.4 MB). Free memory was 87.9 MB in the beginning and 96.0 MB in the end (delta: -8.1 MB). Peak memory consumption was 108.8 MB. Max. memory is 8.0 GB. [2020-10-27 01:12:56,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.82 ms. Allocated memory is still 153.1 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 737.56 ms. Allocated memory is still 153.1 MB. Free memory was 126.9 MB in the beginning and 103.9 MB in the end (delta: 22.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 124.48 ms. Allocated memory is still 153.1 MB. Free memory was 103.9 MB in the beginning and 100.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1008.43 ms. Allocated memory is still 153.1 MB. Free memory was 100.9 MB in the beginning and 88.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10508.36 ms. Allocated memory was 153.1 MB in the beginning and 269.5 MB in the end (delta: 116.4 MB). Free memory was 87.9 MB in the beginning and 96.0 MB in the end (delta: -8.1 MB). Peak memory consumption was 108.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L630] CALL, EXPR create_tree() [L585] struct node *nodelast = ((void *)0); [L586] struct node *node = ((void *)0); [L587] COND TRUE __VERIFIER_nondet_int() [L588] node = malloc(sizeof *node) [L589] COND FALSE !(!node) [L591] node->left = ((void *)0) [L592] node->right = nodelast [L593] COND FALSE !(\read(*nodelast)) [L595] int value = __VERIFIER_nondet_int(); [L596] node->value = value [L597] nodelast = node [L587] COND FALSE !(__VERIFIER_nondet_int()) [L599] COND TRUE node != ((void *)0) [L600] node->left = malloc(sizeof *node) [L601] COND FALSE !(!node) [L603] EXPR node->left [L603] node->left->left = ((void *)0) [L604] EXPR node->left [L604] node->left->right = ((void *)0) [L605] EXPR node->left [L605] node->left->value = 42 [L606] EXPR node->left [L606] node->left->parent = node [L607] EXPR node->right [L607] node = node->right [L599] COND FALSE !(node != ((void *)0)) [L609] return nodelast; [L630] RET, EXPR create_tree() [L630] struct node *data = create_tree(); [L631] COND FALSE !(!data) [L633] CALL inspect(data) [L575] COND FALSE !(!(node)) [L576] COND TRUE node != ((void *)0) [L577] node->left [L577] COND TRUE node->left [L578] EXPR node->left [L578] EXPR node->left->value [L578] COND FALSE !(!(node->left->value == 42)) [L579] EXPR node->value [L579] COND TRUE !(node->value) [L579] CALL fail() [L565] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "tree-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.4s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 175 SDtfs, 450 SDslu, 435 SDs, 0 SdLazy, 1455 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 53 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 147 ConstructedInterpolants, 0 QuantifiedInterpolants, 32749 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 9/11 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...