/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration 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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:52:07,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:52:07,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:52:07,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:52:07,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:52:07,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:52:07,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:52:07,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:52:07,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:52:07,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:52:07,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:52:07,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:52:07,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:52:07,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:52:07,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:52:07,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:52:07,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:52:07,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:52:08,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:52:08,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:52:08,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:52:08,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:52:08,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:52:08,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:52:08,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:52:08,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:52:08,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:52:08,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:52:08,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:52:08,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:52:08,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:52:08,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:52:08,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:52:08,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:52:08,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:52:08,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:52:08,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:52:08,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:52:08,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:52:08,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:52:08,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:52:08,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 06:52:08,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:52:08,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:52:08,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:52:08,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:52:08,100 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:52:08,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:52:08,101 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:52:08,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:52:08,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:52:08,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:52:08,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:52:08,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:52:08,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:52:08,104 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:52:08,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:52:08,104 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:52:08,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:52:08,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:52:08,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:52:08,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:52:08,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:52:08,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:52:08,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:52:08,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:52:08,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:52:08,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:52:08,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:52:08,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:52:08,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:52:08,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> 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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:52:08,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:52:08,621 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:52:08,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:52:08,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:52:08,630 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:52:08,631 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 06:52:08,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61bc0b03d/fa64c85aca144c79aab6fd4e25bc17ad/FLAGe9a994e69 [2020-09-25 06:52:09,303 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:52:09,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 06:52:09,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61bc0b03d/fa64c85aca144c79aab6fd4e25bc17ad/FLAGe9a994e69 [2020-09-25 06:52:09,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61bc0b03d/fa64c85aca144c79aab6fd4e25bc17ad [2020-09-25 06:52:09,651 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:52:09,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:52:09,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:52:09,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:52:09,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:52:09,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:09" (1/1) ... [2020-09-25 06:52:09,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12925ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:09, skipping insertion in model container [2020-09-25 06:52:09,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:09" (1/1) ... [2020-09-25 06:52:09,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:52:09,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:52:09,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:52:09,952 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:52:09,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:52:10,008 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:52:10,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10 WrapperNode [2020-09-25 06:52:10,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:52:10,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:52:10,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:52:10,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:52:10,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10" (1/1) ... [2020-09-25 06:52:10,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10" (1/1) ... [2020-09-25 06:52:10,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10" (1/1) ... [2020-09-25 06:52:10,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10" (1/1) ... [2020-09-25 06:52:10,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10" (1/1) ... [2020-09-25 06:52:10,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10" (1/1) ... [2020-09-25 06:52:10,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10" (1/1) ... [2020-09-25 06:52:10,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:52:10,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:52:10,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:52:10,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:52:10,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:52:10,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:52:10,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:52:10,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 06:52:10,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:52:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:52:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:52:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 06:52:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 06:52:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 06:52:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:52:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 06:52:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 06:52:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 06:52:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 06:52:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:52:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:52:10,573 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:52:10,573 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 06:52:10,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:10 BoogieIcfgContainer [2020-09-25 06:52:10,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:52:10,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:52:10,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:52:10,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:52:10,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:52:09" (1/3) ... [2020-09-25 06:52:10,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e72e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:10, skipping insertion in model container [2020-09-25 06:52:10,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:10" (2/3) ... [2020-09-25 06:52:10,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e72e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:10, skipping insertion in model container [2020-09-25 06:52:10,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:10" (3/3) ... [2020-09-25 06:52:10,590 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-25 06:52:10,603 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:52:10,613 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:52:10,637 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:52:10,670 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:52:10,670 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:52:10,670 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:52:10,670 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:52:10,670 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:52:10,671 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:52:10,671 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:52:10,671 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:52:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 06:52:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 06:52:10,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:10,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:10,707 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:10,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:10,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-25 06:52:10,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:10,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4854562] [2020-09-25 06:52:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:10,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:11,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:11,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:11,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 06:52:11,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:52:11,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-09-25 06:52:11,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:11,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:11,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:11,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 06:52:11,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:11,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:52:11,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:11,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:11,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:11,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:11,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:11,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 06:52:11,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:11,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:11,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 06:52:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:11,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4854562] [2020-09-25 06:52:11,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:11,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 06:52:11,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473357316] [2020-09-25 06:52:11,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 06:52:11,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:11,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 06:52:11,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:52:11,808 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-25 06:52:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:11,998 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-09-25 06:52:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 06:52:12,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-25 06:52:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:12,012 INFO L225 Difference]: With dead ends: 121 [2020-09-25 06:52:12,013 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 06:52:12,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:52:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 06:52:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-25 06:52:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 06:52:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-25 06:52:12,064 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 31 [2020-09-25 06:52:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:12,065 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-25 06:52:12,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 06:52:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-25 06:52:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 06:52:12,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:12,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:12,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:52:12,068 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:12,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:12,069 INFO L82 PathProgramCache]: Analyzing trace with hash -318765620, now seen corresponding path program 1 times [2020-09-25 06:52:12,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:12,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526212713] [2020-09-25 06:52:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:12,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:12,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:12,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:12,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:12,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:12,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 06:52:12,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 06:52:12,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-09-25 06:52:12,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:12,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:52:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 06:52:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 06:52:12,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:12,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:12,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:12,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:12,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:12,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:12,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:52:12,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:12,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:12,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:12,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:12,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:12,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:12,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526212713] [2020-09-25 06:52:12,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:12,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:52:12,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055102705] [2020-09-25 06:52:12,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:52:12,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:12,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:52:12,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:52:12,627 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2020-09-25 06:52:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:12,819 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-09-25 06:52:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:52:12,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 06:52:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:12,824 INFO L225 Difference]: With dead ends: 95 [2020-09-25 06:52:12,824 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 06:52:12,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:52:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 06:52:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-25 06:52:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 06:52:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 06:52:12,842 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-25 06:52:12,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:12,842 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 06:52:12,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:52:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 06:52:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 06:52:12,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:12,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:12,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:52:12,845 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:12,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:12,846 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-25 06:52:12,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:12,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45666606] [2020-09-25 06:52:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:12,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:12,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:12,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:13,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:13,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:14,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:14,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 06:52:14,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 06:52:14,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1584 [2020-09-25 06:52:14,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:14,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:14,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:52:14,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:52:14,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 06:52:14,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:14,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:14,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:14,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:14,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:14,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:14,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:52:14,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:14,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:14,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:14,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:14,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:14,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 06:52:14,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45666606] [2020-09-25 06:52:14,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:14,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 06:52:14,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104530164] [2020-09-25 06:52:14,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:52:14,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:14,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:52:14,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:52:14,508 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 6 states. [2020-09-25 06:52:14,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:14,745 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-09-25 06:52:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 06:52:14,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-25 06:52:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:14,747 INFO L225 Difference]: With dead ends: 118 [2020-09-25 06:52:14,747 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 06:52:14,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 06:52:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 06:52:14,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-09-25 06:52:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 06:52:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-09-25 06:52:14,757 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 41 [2020-09-25 06:52:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:14,758 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-09-25 06:52:14,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:52:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-09-25 06:52:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 06:52:14,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:14,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:14,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:52:14,760 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:14,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2141827952, now seen corresponding path program 1 times [2020-09-25 06:52:14,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:14,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616519395] [2020-09-25 06:52:14,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:14,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:15,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:15,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:16,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:19,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:19,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 06:52:19,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:52:19,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 06:52:19,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:19,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:19,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 06:52:19,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 06:52:19,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 06:52:19,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:52:20,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:20,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:20,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:20,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:20,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:20,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:52:20,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:20,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:20,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 06:52:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:20,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616519395] [2020-09-25 06:52:20,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:20,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 06:52:20,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627924550] [2020-09-25 06:52:20,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 06:52:20,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:20,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 06:52:20,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 06:52:20,352 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-09-25 06:52:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:21,596 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-09-25 06:52:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 06:52:21,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-25 06:52:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:21,599 INFO L225 Difference]: With dead ends: 164 [2020-09-25 06:52:21,600 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 06:52:21,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 06:52:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 06:52:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 90. [2020-09-25 06:52:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 06:52:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-09-25 06:52:21,617 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 48 [2020-09-25 06:52:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:21,618 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-09-25 06:52:21,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 06:52:21,618 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-09-25 06:52:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 06:52:21,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:21,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:21,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:52:21,621 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash -523876270, now seen corresponding path program 2 times [2020-09-25 06:52:21,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:21,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348524561] [2020-09-25 06:52:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:21,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:21,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:21,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:22,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:26,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:26,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 06:52:26,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 06:52:26,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 06:52:26,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:26,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:26,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:52:26,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:52:26,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 06:52:26,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:26,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:26,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:26,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:26,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:26,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:26,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:52:26,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:26,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:26,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:26,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:26,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:26,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:26,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348524561] [2020-09-25 06:52:26,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:26,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:52:26,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296109304] [2020-09-25 06:52:26,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:52:26,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:52:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:26,758 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 8 states. [2020-09-25 06:52:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:27,118 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2020-09-25 06:52:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 06:52:27,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-09-25 06:52:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:27,124 INFO L225 Difference]: With dead ends: 166 [2020-09-25 06:52:27,125 INFO L226 Difference]: Without dead ends: 146 [2020-09-25 06:52:27,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-25 06:52:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-25 06:52:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-25 06:52:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 06:52:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-09-25 06:52:27,147 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 55 [2020-09-25 06:52:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:27,148 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-09-25 06:52:27,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:52:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-09-25 06:52:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 06:52:27,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:27,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:27,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:52:27,153 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2134174762, now seen corresponding path program 3 times [2020-09-25 06:52:27,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:27,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350964727] [2020-09-25 06:52:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:27,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:27,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:27,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:27,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:27,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:29,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:30,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:30,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:32,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:32,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 06:52:32,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 06:52:32,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 06:52:32,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:32,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:32,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:52:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:52:32,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 06:52:32,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 06:52:32,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:32,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:32,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:32,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:32,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:32,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 06:52:32,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:32,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:32,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:32,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:32,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:32,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:32,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350964727] [2020-09-25 06:52:32,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:32,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 06:52:32,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422669141] [2020-09-25 06:52:32,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 06:52:32,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 06:52:32,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 06:52:32,358 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-09-25 06:52:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:32,678 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2020-09-25 06:52:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 06:52:32,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-09-25 06:52:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:32,681 INFO L225 Difference]: With dead ends: 165 [2020-09-25 06:52:32,681 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 06:52:32,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 06:52:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 06:52:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2020-09-25 06:52:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 06:52:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-09-25 06:52:32,699 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 58 [2020-09-25 06:52:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:32,700 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-09-25 06:52:32,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 06:52:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-09-25 06:52:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 06:52:32,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:32,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:32,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 06:52:32,704 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-25 06:52:32,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:32,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849620184] [2020-09-25 06:52:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:32,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:34,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:34,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 06:52:34,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:34,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1510 [2020-09-25 06:52:34,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:34,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:52:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:52:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 06:52:34,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:34,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:34,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:34,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:34,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:34,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:34,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:52:34,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:34,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:34,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:34,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:34,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:34,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 06:52:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:34,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:34,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:34,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 06:52:34,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:34,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:52:34,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:34,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:34,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:52:34,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 06:52:34,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 06:52:34,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849620184] [2020-09-25 06:52:34,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:34,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 06:52:34,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86517237] [2020-09-25 06:52:34,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 06:52:34,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:34,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 06:52:34,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 06:52:34,362 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 10 states. [2020-09-25 06:52:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:34,880 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-09-25 06:52:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 06:52:34,882 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-25 06:52:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:34,883 INFO L225 Difference]: With dead ends: 143 [2020-09-25 06:52:34,883 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 06:52:34,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-25 06:52:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 06:52:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-09-25 06:52:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 06:52:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-25 06:52:34,899 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 64 [2020-09-25 06:52:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:34,899 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-25 06:52:34,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 06:52:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-25 06:52:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 06:52:34,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:34,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:34,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 06:52:34,901 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:34,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1930216728, now seen corresponding path program 4 times [2020-09-25 06:52:34,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:34,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774847356] [2020-09-25 06:52:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:34,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:35,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:35,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:35,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:35,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:36,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:37,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:37,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:38,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:39,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:39,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 06:52:39,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 06:52:39,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 06:52:39,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:39,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 06:52:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 06:52:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 06:52:39,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:40,648 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-09-25 06:52:40,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:40,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:40,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:40,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:40,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:40,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:52:40,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:40,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:40,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:40,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:52:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:40,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774847356] [2020-09-25 06:52:40,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:40,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 06:52:40,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484163959] [2020-09-25 06:52:40,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 06:52:40,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:40,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 06:52:40,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-09-25 06:52:40,947 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 23 states. [2020-09-25 06:52:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:43,070 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2020-09-25 06:52:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 06:52:43,071 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-09-25 06:52:43,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:43,073 INFO L225 Difference]: With dead ends: 191 [2020-09-25 06:52:43,073 INFO L226 Difference]: Without dead ends: 189 [2020-09-25 06:52:43,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2020-09-25 06:52:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-25 06:52:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2020-09-25 06:52:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-25 06:52:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-09-25 06:52:43,084 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 65 [2020-09-25 06:52:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:43,084 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-09-25 06:52:43,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 06:52:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-09-25 06:52:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-25 06:52:43,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:43,086 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:43,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 06:52:43,086 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:43,086 INFO L82 PathProgramCache]: Analyzing trace with hash 499090838, now seen corresponding path program 5 times [2020-09-25 06:52:43,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:43,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036590660] [2020-09-25 06:52:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:43,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:43,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:43,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:44,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:44,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:46,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:46,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:48,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:48,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 06:52:48,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:52:48,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 06:52:48,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:48,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:48,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 06:52:48,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:52:48,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 06:52:48,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:52:48,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:48,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:48,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:48,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:48,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:48,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:52:48,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:48,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:48,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:48,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:48,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:48,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:48,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036590660] [2020-09-25 06:52:48,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:48,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 06:52:48,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254597289] [2020-09-25 06:52:48,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 06:52:48,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:48,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 06:52:48,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:52:48,220 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 11 states. [2020-09-25 06:52:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:48,702 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2020-09-25 06:52:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 06:52:48,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-09-25 06:52:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:48,705 INFO L225 Difference]: With dead ends: 193 [2020-09-25 06:52:48,705 INFO L226 Difference]: Without dead ends: 173 [2020-09-25 06:52:48,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-25 06:52:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-25 06:52:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2020-09-25 06:52:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 06:52:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-09-25 06:52:48,715 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 72 [2020-09-25 06:52:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:48,716 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-09-25 06:52:48,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 06:52:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-09-25 06:52:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 06:52:48,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:48,717 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:48,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 06:52:48,718 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:48,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 6 times [2020-09-25 06:52:48,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:48,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264370915] [2020-09-25 06:52:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:48,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:48,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:49,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:49,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:49,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:49,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:50,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:53,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:53,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 06:52:53,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:52:53,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 06:52:53,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:53,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:53,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 06:52:53,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:52:53,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 06:52:53,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:52:53,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:53,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:53,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:53,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:53,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:53,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:52:53,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:53,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:53,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:53,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:53,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:53,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264370915] [2020-09-25 06:52:53,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:53,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 06:52:53,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489031322] [2020-09-25 06:52:53,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 06:52:53,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:53,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 06:52:53,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:52:53,862 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 12 states. [2020-09-25 06:52:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:54,316 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2020-09-25 06:52:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 06:52:54,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-09-25 06:52:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:54,319 INFO L225 Difference]: With dead ends: 192 [2020-09-25 06:52:54,319 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 06:52:54,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-09-25 06:52:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 06:52:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 127. [2020-09-25 06:52:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 06:52:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-09-25 06:52:54,335 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2020-09-25 06:52:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:54,336 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-09-25 06:52:54,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 06:52:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-09-25 06:52:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 06:52:54,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:54,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:54,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 06:52:54,341 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:54,341 INFO L82 PathProgramCache]: Analyzing trace with hash 810536514, now seen corresponding path program 2 times [2020-09-25 06:52:54,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:54,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780429931] [2020-09-25 06:52:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 06:52:54,365 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 06:52:54,365 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 06:52:54,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 06:52:54,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:52:54 BoogieIcfgContainer [2020-09-25 06:52:54,405 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 06:52:54,408 INFO L168 Benchmark]: Toolchain (without parser) took 44753.87 ms. Allocated memory was 147.3 MB in the beginning and 416.8 MB in the end (delta: 269.5 MB). Free memory was 103.9 MB in the beginning and 87.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 285.6 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:54,409 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 06:52:54,410 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.50 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 92.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:54,415 INFO L168 Benchmark]: Boogie Preprocessor took 135.40 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.7 MB in the beginning and 180.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:54,416 INFO L168 Benchmark]: RCFGBuilder took 434.54 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 161.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:54,418 INFO L168 Benchmark]: TraceAbstraction took 43823.07 ms. Allocated memory was 202.9 MB in the beginning and 416.8 MB in the end (delta: 213.9 MB). Free memory was 160.9 MB in the beginning and 87.8 MB in the end (delta: 73.1 MB). Peak memory consumption was 287.0 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:54,431 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 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 352.50 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 92.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.40 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.7 MB in the beginning and 180.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 434.54 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 161.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 43823.07 ms. Allocated memory was 202.9 MB in the beginning and 416.8 MB in the end (delta: 213.9 MB). Free memory was 160.9 MB in the beginning and 87.8 MB in the end (delta: 73.1 MB). Peak memory consumption was 287.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int MAX = __VERIFIER_nondet_uint(); [L15] COND FALSE !(!(MAX > 0)) [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND TRUE i= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND TRUE i >= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND FALSE !(i >= 0) [L32] j = MAX-1 [L33] i=0 [L33] COND TRUE i