/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 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=BIGGEST --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 -i ../../../trunk/examples/svcomp/heap-manipulation/tree-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:42:14,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:42:14,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:42:14,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:42:14,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:42:14,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:42:14,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:42:14,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:42:14,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:42:14,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:42:14,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:42:14,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:42:14,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:42:14,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:42:14,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:42:14,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:42:14,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:42:14,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:42:14,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:42:14,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:42:14,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:42:14,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:42:14,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:42:14,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:42:14,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:42:14,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:42:14,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:42:14,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:42:14,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:42:14,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:42:14,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:42:14,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:42:14,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:42:14,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:42:14,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:42:14,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:42:14,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:42:14,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:42:14,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:42:14,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:42:14,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:42:14,622 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 [2020-10-12 15:42:14,666 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:42:14,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:42:14,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:42:14,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:42:14,669 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:42:14,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:42:14,670 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:42:14,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:42:14,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:42:14,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:42:14,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:42:14,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:42:14,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:42:14,672 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:42:14,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:42:14,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:42:14,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:42:14,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:42:14,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:42:14,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:42:14,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:42:14,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:42:14,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:42:14,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:42:14,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:42:14,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:42:14,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:42:14,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:42:14,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:42:14,674 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 -> 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:42:14,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:42:14,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:42:14,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:42:14,966 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:42:14,966 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:42:14,967 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/tree-2.i [2020-10-12 15:42:15,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4cf28a8c/66bb5df15a5b4029a1258e5f71d3a364/FLAGd8920a7d4 [2020-10-12 15:42:15,517 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:42:15,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/tree-2.i [2020-10-12 15:42:15,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4cf28a8c/66bb5df15a5b4029a1258e5f71d3a364/FLAGd8920a7d4 [2020-10-12 15:42:15,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4cf28a8c/66bb5df15a5b4029a1258e5f71d3a364 [2020-10-12 15:42:15,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:42:15,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:42:15,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:42:15,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:42:15,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:42:15,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:42:15" (1/1) ... [2020-10-12 15:42:15,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8c36e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:15, skipping insertion in model container [2020-10-12 15:42:15,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:42:15" (1/1) ... [2020-10-12 15:42:15,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:42:15,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:42:16,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:42:16,343 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:42:16,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:42:16,447 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:42:16,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16 WrapperNode [2020-10-12 15:42:16,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:42:16,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:42:16,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:42:16,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:42:16,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16" (1/1) ... [2020-10-12 15:42:16,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16" (1/1) ... [2020-10-12 15:42:16,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16" (1/1) ... [2020-10-12 15:42:16,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16" (1/1) ... [2020-10-12 15:42:16,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16" (1/1) ... [2020-10-12 15:42:16,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16" (1/1) ... [2020-10-12 15:42:16,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16" (1/1) ... [2020-10-12 15:42:16,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:42:16,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:42:16,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:42:16,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:42:16,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16" (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 [2020-10-12 15:42:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:42:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:42:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:42:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:42:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-12 15:42:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2020-10-12 15:42:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2020-10-12 15:42:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2020-10-12 15:42:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:42:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:42:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:42:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:42:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:42:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:42:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:42:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:42:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:42:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:42:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:42:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:42:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:42:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:42:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:42:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:42:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:42:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:42:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:42:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:42:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:42:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:42:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:42:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:42:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:42:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:42:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:42:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:42:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:42:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:42:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:42:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:42:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:42:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:42:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:42:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:42:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:42:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:42:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:42:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:42:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:42:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:42:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:42:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:42:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:42:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:42:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:42:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:42:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:42:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:42:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:42:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:42:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:42:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:42:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:42:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:42:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:42:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:42:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:42:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:42:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:42:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:42:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:42:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:42:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:42:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:42:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:42:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:42:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:42:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:42:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:42:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:42:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:42:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:42:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:42:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:42:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:42:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:42:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:42:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:42:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:42:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:42:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:42:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:42:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:42:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:42:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:42:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:42:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:42:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:42:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:42:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:42:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:42:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:42:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:42:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:42:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:42:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:42:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:42:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:42:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:42:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:42:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:42:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:42:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:42:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-12 15:42:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2020-10-12 15:42:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:42:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:42:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2020-10-12 15:42:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:42:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:42:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:42:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2020-10-12 15:42:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:42:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:42:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:42:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:42:17,260 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:42:17,260 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-12 15:42:17,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:42:17 BoogieIcfgContainer [2020-10-12 15:42:17,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:42:17,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:42:17,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:42:17,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:42:17,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:42:15" (1/3) ... [2020-10-12 15:42:17,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19acd1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:42:17, skipping insertion in model container [2020-10-12 15:42:17,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:16" (2/3) ... [2020-10-12 15:42:17,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19acd1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:42:17, skipping insertion in model container [2020-10-12 15:42:17,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:42:17" (3/3) ... [2020-10-12 15:42:17,273 INFO L109 eAbstractionObserver]: Analyzing ICFG tree-2.i [2020-10-12 15:42:17,282 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:42:17,290 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:42:17,303 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:42:17,327 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:42:17,327 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:42:17,328 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:42:17,328 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:42:17,328 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:42:17,329 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:42:17,329 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:42:17,329 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:42:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-10-12 15:42:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 15:42:17,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:17,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:17,354 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:17,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1155977206, now seen corresponding path program 1 times [2020-10-12 15:42:17,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:17,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205905757] [2020-10-12 15:42:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:17,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:17,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:17,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:18,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:18,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:42:18,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:18,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-12 15:42:18,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:18,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:42:18,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 15:42:18,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:42:18,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:42:18,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:18,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:18,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:18,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:18,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:18,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:42:18,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:18,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:18,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:18,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:18,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:18,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:42:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:18,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:18,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:18,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:18,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:42:18,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:18,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-12 15:42:18,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:42:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:42:18,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:18,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205905757] [2020-10-12 15:42:18,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:18,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:42:18,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249170778] [2020-10-12 15:42:18,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:42:18,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:18,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:42:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:42:18,352 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 8 states. [2020-10-12 15:42:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:18,881 INFO L93 Difference]: Finished difference Result 141 states and 215 transitions. [2020-10-12 15:42:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:42:18,883 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-12 15:42:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:18,893 INFO L225 Difference]: With dead ends: 141 [2020-10-12 15:42:18,894 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 15:42:18,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:42:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 15:42:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-12 15:42:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:42:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-12 15:42:18,943 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2020-10-12 15:42:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:18,943 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-12 15:42:18,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:42:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-12 15:42:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 15:42:18,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:18,945 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] [2020-10-12 15:42:18,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:42:18,946 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash 873365677, now seen corresponding path program 1 times [2020-10-12 15:42:18,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:18,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279016003] [2020-10-12 15:42:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:18,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:19,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:42:19,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:42:19,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-12 15:42:19,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:19,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:42:19,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:42:19,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:42:19,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:19,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:19,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:19,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:19,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:19,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:19,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:42:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:19,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:19,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:42:19,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:19,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-12 15:42:19,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:42:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:42:19,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:19,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279016003] [2020-10-12 15:42:19,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:19,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 15:42:19,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936154223] [2020-10-12 15:42:19,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:42:19,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:19,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:42:19,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:42:19,977 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 11 states. [2020-10-12 15:42:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:20,446 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-10-12 15:42:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:42:20,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-12 15:42:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:20,448 INFO L225 Difference]: With dead ends: 90 [2020-10-12 15:42:20,448 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:42:20,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:42:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-10-12 15:42:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:42:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-12 15:42:20,458 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2020-10-12 15:42:20,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:20,459 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-12 15:42:20,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:42:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-12 15:42:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:42:20,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:20,461 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] [2020-10-12 15:42:20,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:42:20,461 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:20,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:20,461 INFO L82 PathProgramCache]: Analyzing trace with hash 773909496, now seen corresponding path program 1 times [2020-10-12 15:42:20,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:20,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177446632] [2020-10-12 15:42:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:20,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:20,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:42:20,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:20,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-12 15:42:20,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:20,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:42:20,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:42:20,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:42:20,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:21,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:21,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:21,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:21,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:21,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:21,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:42:21,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:21,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:21,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:21,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:42:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:21,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:21,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:21,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:42:21,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:21,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-12 15:42:21,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:21,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:42:21,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:21,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:42:21,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:21,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177446632] [2020-10-12 15:42:21,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:21,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:42:21,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958414751] [2020-10-12 15:42:21,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:42:21,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:21,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:42:21,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:42:21,520 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 14 states. [2020-10-12 15:42:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:22,188 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2020-10-12 15:42:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:42:22,189 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 15:42:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:22,191 INFO L225 Difference]: With dead ends: 93 [2020-10-12 15:42:22,191 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:42:22,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:42:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:42:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2020-10-12 15:42:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:42:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-12 15:42:22,202 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 34 [2020-10-12 15:42:22,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:22,203 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-12 15:42:22,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:42:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-12 15:42:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:42:22,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:22,205 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] [2020-10-12 15:42:22,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:42:22,205 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:22,206 INFO L82 PathProgramCache]: Analyzing trace with hash 754823974, now seen corresponding path program 1 times [2020-10-12 15:42:22,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:22,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985411719] [2020-10-12 15:42:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:22,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:22,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:22,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:42:22,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:22,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-12 15:42:22,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:22,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:42:22,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:42:22,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:42:22,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:22,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:22,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:22,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:22,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:22,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:22,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:22,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:22,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:22,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:22,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:22,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:22,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:42:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:22,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:22,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:22,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:42:22,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:22,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-12 15:42:22,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:42:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:42:22,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:23,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985411719] [2020-10-12 15:42:23,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:23,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:42:23,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575663161] [2020-10-12 15:42:23,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:42:23,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:42:23,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:42:23,259 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 14 states. [2020-10-12 15:42:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:24,279 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-10-12 15:42:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:42:24,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 15:42:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:24,282 INFO L225 Difference]: With dead ends: 80 [2020-10-12 15:42:24,282 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 15:42:24,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:42:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 15:42:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2020-10-12 15:42:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 15:42:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-12 15:42:24,293 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 34 [2020-10-12 15:42:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:24,293 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-12 15:42:24,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:42:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-12 15:42:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:42:24,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:24,295 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] [2020-10-12 15:42:24,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:42:24,295 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:24,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1479587423, now seen corresponding path program 1 times [2020-10-12 15:42:24,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:24,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578269040] [2020-10-12 15:42:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 15:42:24,334 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 15:42:24,334 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 15:42:24,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:42:24,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:42:24 BoogieIcfgContainer [2020-10-12 15:42:24,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:42:24,366 INFO L168 Benchmark]: Toolchain (without parser) took 8516.77 ms. Allocated memory was 140.5 MB in the beginning and 312.0 MB in the end (delta: 171.4 MB). Free memory was 101.5 MB in the beginning and 189.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 83.4 MB. Max. memory is 7.1 GB. [2020-10-12 15:42:24,367 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 15:42:24,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 599.45 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 101.3 MB in the beginning and 171.2 MB in the end (delta: -70.0 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-10-12 15:42:24,369 INFO L168 Benchmark]: Boogie Preprocessor took 70.09 ms. Allocated memory is still 205.5 MB. Free memory was 171.2 MB in the beginning and 168.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-10-12 15:42:24,370 INFO L168 Benchmark]: RCFGBuilder took 745.78 ms. Allocated memory is still 205.5 MB. Free memory was 168.0 MB in the beginning and 115.9 MB in the end (delta: 52.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. [2020-10-12 15:42:24,371 INFO L168 Benchmark]: TraceAbstraction took 7096.75 ms. Allocated memory was 205.5 MB in the beginning and 312.0 MB in the end (delta: 106.4 MB). Free memory was 115.3 MB in the beginning and 189.5 MB in the end (delta: -74.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. [2020-10-12 15:42:24,374 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 599.45 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 101.3 MB in the beginning and 171.2 MB in the end (delta: -70.0 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.09 ms. Allocated memory is still 205.5 MB. Free memory was 171.2 MB in the beginning and 168.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 745.78 ms. Allocated memory is still 205.5 MB. Free memory was 168.0 MB in the beginning and 115.9 MB in the end (delta: 52.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7096.75 ms. Allocated memory was 205.5 MB in the beginning and 312.0 MB in the end (delta: 106.4 MB). Free memory was 115.3 MB in the beginning and 189.5 MB in the end (delta: -74.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L619] CALL, EXPR create_tree() [L574] struct node *nodelast = ((void *)0); [L575] struct node *node = ((void *)0); [L576] COND TRUE __VERIFIER_nondet_int() [L577] node = malloc(sizeof *node) [L578] COND FALSE !(!node) [L580] node->left = ((void *)0) [L581] node->right = nodelast [L582] COND FALSE !(\read(*nodelast)) [L584] int value = __VERIFIER_nondet_int(); [L585] node->value = value [L586] nodelast = node [L576] COND FALSE !(__VERIFIER_nondet_int()) [L588] COND TRUE node != ((void *)0) [L589] node->left = malloc(sizeof *node) [L590] COND FALSE !(!node) [L592] EXPR node->left [L592] node->left->left = ((void *)0) [L593] EXPR node->left [L593] node->left->right = ((void *)0) [L594] EXPR node->left [L594] node->left->value = 42 [L595] EXPR node->left [L595] node->left->parent = node [L596] EXPR node->right [L596] node = node->right [L588] COND FALSE !(node != ((void *)0)) [L598] return nodelast; [L619] RET, EXPR create_tree() [L619] struct node *data = create_tree(); [L620] COND FALSE !(!data) [L622] CALL inspect(data) [L564] COND FALSE !(!(node)) [L565] COND TRUE node != ((void *)0) [L566] node->left [L566] COND TRUE node->left [L567] EXPR node->left [L567] EXPR node->left->value [L567] COND FALSE !(!(node->left->value == 42)) [L568] EXPR node->value [L568] COND TRUE !(node->value) [L568] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 66 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 402 SDslu, 407 SDs, 0 SdLazy, 1335 SolverSat, 93 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred 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, 4 MinimizatonAttempts, 54 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 29239 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 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...