/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:33:31,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:33:31,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:33:31,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:33:31,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:33:31,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:33:31,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:33:31,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:33:31,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:33:31,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:33:31,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:33:31,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:33:31,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:33:31,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:33:31,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:33:31,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:33:31,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:33:31,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:33:31,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:33:31,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:33:31,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:33:31,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:33:31,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:33:31,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:33:31,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:33:31,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:33:31,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:33:31,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:33:31,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:33:31,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:33:31,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:33:31,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:33:31,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:33:31,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:33:31,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:33:31,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:33:31,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:33:31,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:33:31,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:33:31,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:33:31,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:33:31,792 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 [2020-10-14 18:33:31,845 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:33:31,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:33:31,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:33:31,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:33:31,850 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:33:31,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:33:31,851 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:33:31,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:33:31,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:33:31,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:33:31,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:33:31,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:33:31,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:33:31,852 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:33:31,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:33:31,852 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:33:31,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:33:31,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:33:31,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:33:31,854 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:33:31,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:33:31,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:33:31,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:33:31,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:33:31,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:33:31,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:33:31,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:33:31,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:33:31,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:33:31,856 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:33:32,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:33:32,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:33:32,182 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:33:32,185 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:33:32,186 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:33:32,188 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2020-10-14 18:33:32,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a6163f2c/9b1986c026fd43a4ad068b7fab90a3d9/FLAG1f0fa805d [2020-10-14 18:33:32,670 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:33:32,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2020-10-14 18:33:32,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a6163f2c/9b1986c026fd43a4ad068b7fab90a3d9/FLAG1f0fa805d [2020-10-14 18:33:33,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a6163f2c/9b1986c026fd43a4ad068b7fab90a3d9 [2020-10-14 18:33:33,044 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:33:33,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:33:33,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:33:33,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:33:33,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:33:33,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:33:33" (1/1) ... [2020-10-14 18:33:33,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5d5e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33, skipping insertion in model container [2020-10-14 18:33:33,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:33:33" (1/1) ... [2020-10-14 18:33:33,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:33:33,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:33:33,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:33:33,287 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:33:33,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:33:33,336 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:33:33,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33 WrapperNode [2020-10-14 18:33:33,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:33:33,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:33:33,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:33:33,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:33:33,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33" (1/1) ... [2020-10-14 18:33:33,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33" (1/1) ... [2020-10-14 18:33:33,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33" (1/1) ... [2020-10-14 18:33:33,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33" (1/1) ... [2020-10-14 18:33:33,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33" (1/1) ... [2020-10-14 18:33:33,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33" (1/1) ... [2020-10-14 18:33:33,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33" (1/1) ... [2020-10-14 18:33:33,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:33:33,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:33:33,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:33:33,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:33:33,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33" (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 [2020-10-14 18:33:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:33:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:33:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:33:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:33:33,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:33:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 18:33:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:33:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:33:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:33:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:33:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:33:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:33:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:33:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:33:33,889 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:33:33,890 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:33:33,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:33:33 BoogieIcfgContainer [2020-10-14 18:33:33,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:33:33,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:33:33,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:33:33,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:33:33,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:33:33" (1/3) ... [2020-10-14 18:33:33,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c8b730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:33:33, skipping insertion in model container [2020-10-14 18:33:33,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:33" (2/3) ... [2020-10-14 18:33:33,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c8b730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:33:33, skipping insertion in model container [2020-10-14 18:33:33,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:33:33" (3/3) ... [2020-10-14 18:33:33,911 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_sendmail_tTflag_arr_one_loop.c [2020-10-14 18:33:33,924 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:33:33,932 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:33:33,948 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:33:33,974 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:33:33,975 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:33:33,975 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:33:33,975 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:33:33,975 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:33:33,976 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:33:33,976 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:33:33,976 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:33:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-14 18:33:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 18:33:34,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:34,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:34,001 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:34,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:34,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1522547275, now seen corresponding path program 1 times [2020-10-14 18:33:34,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:34,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271617329] [2020-10-14 18:33:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:34,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:34,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:34,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 18:33:34,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:33:34,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-14 18:33:34,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:34,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:33:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:33:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:33:34,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 18:33:34,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:34,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:34,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:34,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:33:34,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:34,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 18:33:34,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:34,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:34,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:34,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:34,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:34,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271617329] [2020-10-14 18:33:34,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:33:34,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 18:33:34,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205228834] [2020-10-14 18:33:34,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:33:34,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:34,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:33:34,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:33:34,664 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-10-14 18:33:34,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:34,846 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-14 18:33:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:33:34,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-14 18:33:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:34,858 INFO L225 Difference]: With dead ends: 45 [2020-10-14 18:33:34,859 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 18:33:34,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:33:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 18:33:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 18:33:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 18:33:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-14 18:33:34,908 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-14 18:33:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:34,909 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-14 18:33:34,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:33:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-14 18:33:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 18:33:34,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:34,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:34,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:33:34,911 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:34,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:34,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1785714929, now seen corresponding path program 1 times [2020-10-14 18:33:34,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:34,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135297626] [2020-10-14 18:33:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:34,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:35,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:35,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:35,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 18:33:35,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:33:35,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 444 [2020-10-14 18:33:35,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:35,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:33:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:33:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:33:35,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:35,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:35,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:35,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:35,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:33:35,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:35,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:33:35,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:35,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:35,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:35,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135297626] [2020-10-14 18:33:35,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:35,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:33:35,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171297496] [2020-10-14 18:33:35,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:33:35,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:35,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:33:35,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:33:35,486 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2020-10-14 18:33:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:35,598 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-14 18:33:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:33:35,598 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-14 18:33:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:35,599 INFO L225 Difference]: With dead ends: 30 [2020-10-14 18:33:35,599 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 18:33:35,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:33:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 18:33:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-14 18:33:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 18:33:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-14 18:33:35,607 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-10-14 18:33:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:35,608 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-14 18:33:35,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:33:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-14 18:33:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 18:33:35,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:35,609 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:35,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:33:35,610 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash -490583987, now seen corresponding path program 1 times [2020-10-14 18:33:35,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:35,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519325494] [2020-10-14 18:33:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:36,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:36,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:33:36,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:33:36,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-14 18:33:36,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:36,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:33:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 18:33:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 18:33:36,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:36,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:36,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:36,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:36,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:33:36,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:36,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:33:36,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:36,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:36,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:36,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:33:36,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519325494] [2020-10-14 18:33:36,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:36,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:33:36,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222083596] [2020-10-14 18:33:36,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:33:36,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:36,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:33:36,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:33:36,529 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-10-14 18:33:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:36,687 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-14 18:33:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:33:36,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-14 18:33:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:36,689 INFO L225 Difference]: With dead ends: 28 [2020-10-14 18:33:36,689 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 18:33:36,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:33:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 18:33:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2020-10-14 18:33:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 18:33:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 18:33:36,697 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-10-14 18:33:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:36,698 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 18:33:36,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:33:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 18:33:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 18:33:36,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:36,700 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:36,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:33:36,701 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2007303345, now seen corresponding path program 2 times [2020-10-14 18:33:36,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:36,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190488479] [2020-10-14 18:33:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:36,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:36,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:37,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:37,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 18:33:37,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:33:37,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-14 18:33:37,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:37,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:37,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:33:37,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 18:33:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:33:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:50,276 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2020-10-14 18:33:56,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:56,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:56,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:56,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:33:56,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:56,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:33:56,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:56,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:56,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:56,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:56,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:56,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:33:56,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190488479] [2020-10-14 18:33:56,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:56,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:33:56,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797131420] [2020-10-14 18:33:56,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:33:56,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:56,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:33:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=50, Unknown=4, NotChecked=0, Total=72 [2020-10-14 18:33:56,671 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 9 states. [2020-10-14 18:33:59,898 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-14 18:34:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:07,363 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-14 18:34:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:34:07,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-14 18:34:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:07,365 INFO L225 Difference]: With dead ends: 31 [2020-10-14 18:34:07,365 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 18:34:07,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=40, Invalid=111, Unknown=5, NotChecked=0, Total=156 [2020-10-14 18:34:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 18:34:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-10-14 18:34:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 18:34:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-14 18:34:07,373 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-14 18:34:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:07,373 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-14 18:34:07,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:34:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-14 18:34:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 18:34:07,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:07,374 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:07,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:34:07,375 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2132399309, now seen corresponding path program 3 times [2020-10-14 18:34:07,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:07,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184181685] [2020-10-14 18:34:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:07,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:07,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking...