/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:19:44,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:19:44,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:19:44,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:19:44,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:19:45,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:19:45,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:19:45,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:19:45,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:19:45,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:19:45,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:19:45,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:19:45,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:19:45,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:19:45,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:19:45,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:19:45,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:19:45,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:19:45,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:19:45,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:19:45,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:19:45,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:19:45,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:19:45,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:19:45,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:19:45,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:19:45,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:19:45,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:19:45,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:19:45,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:19:45,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:19:45,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:19:45,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:19:45,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:19:45,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:19:45,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:19:45,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:19:45,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:19:45,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:19:45,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:19:45,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:19:45,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:19:45,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:19:45,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:19:45,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:19:45,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:19:45,115 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:19:45,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:19:45,115 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:19:45,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:19:45,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:19:45,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:19:45,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:19:45,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:19:45,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:19:45,118 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:19:45,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:19:45,118 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:19:45,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:19:45,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:19:45,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:19:45,119 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:19:45,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:19:45,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:19:45,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:19:45,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:19:45,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:19:45,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:19:45,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:19:45,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:19:45,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:19:45,121 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:19:45,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:19:45,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:19:45,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:19:45,437 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:19:45,439 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:19:45,439 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-14 05:19:45,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42fb5a0e7/eba118b72a884f89874d4cda76c6fd45/FLAG35a48fdd1 [2020-10-14 05:19:45,920 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:19:45,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-14 05:19:45,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42fb5a0e7/eba118b72a884f89874d4cda76c6fd45/FLAG35a48fdd1 [2020-10-14 05:19:46,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42fb5a0e7/eba118b72a884f89874d4cda76c6fd45 [2020-10-14 05:19:46,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:19:46,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:19:46,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:19:46,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:19:46,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:19:46,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:19:46" (1/1) ... [2020-10-14 05:19:46,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1516d3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46, skipping insertion in model container [2020-10-14 05:19:46,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:19:46" (1/1) ... [2020-10-14 05:19:46,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:19:46,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:19:46,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:19:46,586 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:19:46,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:19:46,632 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:19:46,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46 WrapperNode [2020-10-14 05:19:46,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:19:46,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:19:46,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:19:46,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:19:46,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46" (1/1) ... [2020-10-14 05:19:46,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46" (1/1) ... [2020-10-14 05:19:46,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46" (1/1) ... [2020-10-14 05:19:46,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46" (1/1) ... [2020-10-14 05:19:46,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46" (1/1) ... [2020-10-14 05:19:46,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46" (1/1) ... [2020-10-14 05:19:46,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46" (1/1) ... [2020-10-14 05:19:46,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:19:46,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:19:46,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:19:46,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:19:46,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:19:46,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:19:46,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:19:46,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:19:46,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:19:46,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:19:46,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:19:46,843 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:19:46,844 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:19:46,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:19:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:19:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:19:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:19:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:19:47,070 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:19:47,070 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 05:19:47,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:19:47 BoogieIcfgContainer [2020-10-14 05:19:47,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:19:47,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:19:47,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:19:47,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:19:47,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:19:46" (1/3) ... [2020-10-14 05:19:47,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f0e043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:19:47, skipping insertion in model container [2020-10-14 05:19:47,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:19:46" (2/3) ... [2020-10-14 05:19:47,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f0e043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:19:47, skipping insertion in model container [2020-10-14 05:19:47,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:19:47" (3/3) ... [2020-10-14 05:19:47,100 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-10-14 05:19:47,135 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:19:47,155 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:19:47,190 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:19:47,224 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:19:47,225 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:19:47,225 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:19:47,225 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:19:47,225 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:19:47,225 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:19:47,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:19:47,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:19:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-14 05:19:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:19:47,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:47,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:19:47,254 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-10-14 05:19:47,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:47,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417533185] [2020-10-14 05:19:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:47,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:47,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:47,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:19:47,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:47,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 05:19:47,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:47,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:19:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:19:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:19:47,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:19:47,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:47,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:47,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:19:47,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:47,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:19:47,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:47,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:47,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:47,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:47,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:19:47,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417533185] [2020-10-14 05:19:47,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:19:47,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:19:47,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966018867] [2020-10-14 05:19:47,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:19:47,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:47,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:19:47,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:19:47,684 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-10-14 05:19:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:47,800 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-10-14 05:19:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:19:47,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 05:19:47,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:47,814 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:19:47,814 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:19:47,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:19:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:19:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 05:19:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:19:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-14 05:19:47,870 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-10-14 05:19:47,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:47,871 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-14 05:19:47,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:19:47,871 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-14 05:19:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:19:47,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:47,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:19:47,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:19:47,875 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:47,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:47,875 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-10-14 05:19:47,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:47,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258012810] [2020-10-14 05:19:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:47,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:48,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:48,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:19:48,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:48,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-14 05:19:48,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:48,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:19:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:19:48,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:19:48,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:48,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:48,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:48,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:48,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:19:48,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:48,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:19:48,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:48,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:48,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:48,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:48,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:48,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:19:48,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258012810] [2020-10-14 05:19:48,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:19:48,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:19:48,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097531812] [2020-10-14 05:19:48,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:19:48,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:48,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:19:48,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:19:48,097 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-14 05:19:48,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:48,259 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-10-14 05:19:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:19:48,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 05:19:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:48,263 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:19:48,263 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:19:48,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:19:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:19:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2020-10-14 05:19:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:19:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-14 05:19:48,279 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 16 [2020-10-14 05:19:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:48,280 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-14 05:19:48,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:19:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-14 05:19:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:19:48,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:48,282 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:19:48,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:19:48,282 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-10-14 05:19:48,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:48,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254491779] [2020-10-14 05:19:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:48,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:48,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:48,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:19:48,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:48,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-14 05:19:48,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:48,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:19:48,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:19:48,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:19:48,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:48,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:48,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:48,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:48,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:19:48,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:48,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:19:48,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:48,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:48,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:48,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:48,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:48,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:48,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 05:19:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:48,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:48,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:48,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:19:48,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:48,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 05:19:48,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:48,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:19:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:48,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:19:48,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:19:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:19:48,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254491779] [2020-10-14 05:19:48,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:19:48,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:19:48,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884218821] [2020-10-14 05:19:48,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:19:48,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:48,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:19:48,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:19:48,528 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 5 states. [2020-10-14 05:19:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:48,610 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-14 05:19:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:19:48,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 05:19:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:48,614 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:19:48,615 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 05:19:48,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:19:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 05:19:48,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 05:19:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:19:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-14 05:19:48,633 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 20 [2020-10-14 05:19:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:48,633 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-14 05:19:48,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:19:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-14 05:19:48,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:19:48,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:48,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:19:48,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:19:48,635 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:48,636 INFO L82 PathProgramCache]: Analyzing trace with hash -796180215, now seen corresponding path program 1 times [2020-10-14 05:19:48,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:48,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729386259] [2020-10-14 05:19:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:48,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:48,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:48,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:48,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:49,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:19:49,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:19:49,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-14 05:19:49,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:49,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:49,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:19:49,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:19:49,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:19:49,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:49,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:49,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:49,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:19:49,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:49,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:19:49,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:49,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:49,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:49,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:49,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:49,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:19:49,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729386259] [2020-10-14 05:19:49,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:19:49,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:19:49,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595634018] [2020-10-14 05:19:49,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:19:49,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:49,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:19:49,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:19:49,090 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 5 states. [2020-10-14 05:19:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:49,221 INFO L93 Difference]: Finished difference Result 112 states and 152 transitions. [2020-10-14 05:19:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:19:49,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 05:19:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:49,224 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:19:49,224 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:19:49,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:19:49,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:19:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2020-10-14 05:19:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 05:19:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-10-14 05:19:49,240 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 20 [2020-10-14 05:19:49,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:49,240 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-10-14 05:19:49,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:19:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-10-14 05:19:49,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:19:49,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:49,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:19:49,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:19:49,242 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:49,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1513938898, now seen corresponding path program 1 times [2020-10-14 05:19:49,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:49,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660711875] [2020-10-14 05:19:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:49,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:49,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:19:49,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:19:49,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 05:19:49,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:49,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:49,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:19:49,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:19:49,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:19:49,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:49,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:49,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:19:49,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:49,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:19:49,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:49,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:49,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:49,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:19:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:49,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:49,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:19:49,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:19:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 05:19:49,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:49,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:19:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:19:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:19:49,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660711875] [2020-10-14 05:19:49,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:19:49,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:19:49,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387051938] [2020-10-14 05:19:49,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:19:49,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:19:49,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:19:49,528 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 7 states. [2020-10-14 05:19:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:49,675 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2020-10-14 05:19:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:19:49,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-14 05:19:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:49,678 INFO L225 Difference]: With dead ends: 66 [2020-10-14 05:19:49,678 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:19:49,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:19:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:19:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-10-14 05:19:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:19:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-14 05:19:49,689 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 23 [2020-10-14 05:19:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:49,689 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-14 05:19:49,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:19:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-14 05:19:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:19:49,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:49,691 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-14 05:19:49,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:19:49,692 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-10-14 05:19:49,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:49,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147151051] [2020-10-14 05:19:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:49,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:49,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:50,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:50,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:19:50,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:19:50,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-14 05:19:50,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:50,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:50,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:19:50,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:19:50,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:19:50,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:50,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:50,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:50,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:50,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:19:50,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:50,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:19:50,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:50,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:50,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:50,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:50,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:50,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:50,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:19:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:50,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:50,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:50,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:19:50,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:50,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:19:50,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:50,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:19:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:19:50,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:50,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:19:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:50,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:50,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:50,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:19:50,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:50,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:19:50,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:50,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:19:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:19:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:19:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:19:50,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147151051] [2020-10-14 05:19:50,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:19:50,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:19:50,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667811371] [2020-10-14 05:19:50,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:19:50,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:50,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:19:50,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:19:50,626 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 8 states. [2020-10-14 05:19:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:50,823 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-10-14 05:19:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:19:50,824 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-14 05:19:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:50,825 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:19:50,825 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 05:19:50,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:19:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 05:19:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 05:19:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 05:19:50,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 05:19:50,828 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-10-14 05:19:50,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:50,828 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 05:19:50,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:19:50,829 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 05:19:50,829 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 05:19:50,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:19:50,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 05:19:51,081 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 05:19:51,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:19:51,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:19:51,081 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 05:19:51,081 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 05:19:51,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:19:51,081 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-14 05:19:51,082 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-14 05:19:51,082 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-14 05:19:51,082 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-14 05:19:51,082 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-10-14 05:19:51,082 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-10-14 05:19:51,082 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-14 05:19:51,082 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-10-14 05:19:51,082 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse1 (* 2 main_~i~0))) (let ((.cse0 (<= .cse1 main_~j~0)) (.cse2 (<= (+ main_~j~0 1) main_~n~0))) (or (and .cse0 (<= .cse1 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) .cse2) (and .cse0 .cse2 (<= (+ .cse1 1) main_~k~0) (<= main_~k~0 main_~n~0))))) [2020-10-14 05:19:51,083 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-14 05:19:51,083 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-10-14 05:19:51,083 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-10-14 05:19:51,083 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-10-14 05:19:51,083 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-10-14 05:19:51,084 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2020-10-14 05:19:51,084 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-10-14 05:19:51,084 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-10-14 05:19:51,084 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-14 05:19:51,084 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-10-14 05:19:51,084 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-10-14 05:19:51,084 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-10-14 05:19:51,084 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-14 05:19:51,084 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-14 05:19:51,085 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-14 05:19:51,085 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-14 05:19:51,085 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-14 05:19:51,085 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-14 05:19:51,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:19:51 BoogieIcfgContainer [2020-10-14 05:19:51,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:19:51,110 INFO L168 Benchmark]: Toolchain (without parser) took 4776.46 ms. Allocated memory was 148.4 MB in the beginning and 272.1 MB in the end (delta: 123.7 MB). Free memory was 104.6 MB in the beginning and 218.6 MB in the end (delta: -114.0 MB). Peak memory consumption was 96.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:19:51,111 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 148.4 MB. Free memory was 123.0 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-14 05:19:51,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.25 ms. Allocated memory is still 148.4 MB. Free memory was 104.4 MB in the beginning and 94.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-10-14 05:19:51,113 INFO L168 Benchmark]: Boogie Preprocessor took 140.10 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 94.5 MB in the beginning and 183.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-10-14 05:19:51,114 INFO L168 Benchmark]: RCFGBuilder took 301.93 ms. Allocated memory is still 205.5 MB. Free memory was 183.5 MB in the beginning and 169.3 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-10-14 05:19:51,115 INFO L168 Benchmark]: TraceAbstraction took 4027.96 ms. Allocated memory was 205.5 MB in the beginning and 272.1 MB in the end (delta: 66.6 MB). Free memory was 168.6 MB in the beginning and 218.6 MB in the end (delta: -50.0 MB). Peak memory consumption was 103.5 MB. Max. memory is 7.1 GB. [2020-10-14 05:19:51,122 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 148.4 MB. Free memory was 123.0 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.25 ms. Allocated memory is still 148.4 MB. Free memory was 104.4 MB in the beginning and 94.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.10 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 94.5 MB in the beginning and 183.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 301.93 ms. Allocated memory is still 205.5 MB. Free memory was 183.5 MB in the beginning and 169.3 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4027.96 ms. Allocated memory was 205.5 MB in the beginning and 272.1 MB in the end (delta: 66.6 MB). Free memory was 168.6 MB in the beginning and 218.6 MB in the end (delta: -50.0 MB). Peak memory consumption was 103.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((2 * i <= j && 2 * i <= k) && k + 1 <= n) && j + 1 <= n) || (((2 * i <= j && j + 1 <= n) && 2 * i + 1 <= k) && k <= n) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n <= k && k <= n - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (2 * i <= j && n <= k) && k <= n - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 101 SDslu, 466 SDs, 0 SdLazy, 341 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 52 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 30 PreInvPairs, 53 NumberOfFragments, 123 HoareAnnotationTreeSize, 30 FomulaSimplifications, 1739 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 107 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 119 ConstructedInterpolants, 0 QuantifiedInterpolants, 5635 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 17/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...