/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:16:31,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:16:31,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:16:31,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:16:31,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:16:31,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:16:31,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:16:31,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:16:31,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:16:31,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:16:31,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:16:31,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:16:31,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:16:31,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:16:31,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:16:31,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:16:31,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:16:31,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:16:31,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:16:31,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:16:31,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:16:31,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:16:31,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:16:31,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:16:31,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:16:31,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:16:31,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:16:31,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:16:31,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:16:31,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:16:31,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:16:31,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:16:31,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:16:31,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:16:31,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:16:31,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:16:31,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:16:31,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:16:31,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:16:32,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:16:32,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:16:32,002 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 12:16:32,045 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:16:32,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:16:32,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:16:32,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:16:32,048 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:16:32,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:16:32,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:16:32,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:16:32,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:16:32,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:16:32,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:16:32,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:16:32,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:16:32,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:16:32,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:16:32,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:16:32,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:16:32,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:16:32,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:16:32,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:16:32,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:16:32,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:16:32,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:16:32,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:16:32,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:16:32,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:16:32,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:16:32,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:16:32,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:16:32,055 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:16:32,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:16:32,548 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:16:32,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:16:32,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:16:32,555 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:16:32,556 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 12:16:32,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09334d407/42fd9d3fb47243488199b7e92438faa4/FLAGb4b09bf2b [2020-09-25 12:16:33,155 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:16:33,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 12:16:33,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09334d407/42fd9d3fb47243488199b7e92438faa4/FLAGb4b09bf2b [2020-09-25 12:16:33,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09334d407/42fd9d3fb47243488199b7e92438faa4 [2020-09-25 12:16:33,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:16:33,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:16:33,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:16:33,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:16:33,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:16:33,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:16:33" (1/1) ... [2020-09-25 12:16:33,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bafea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33, skipping insertion in model container [2020-09-25 12:16:33,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:16:33" (1/1) ... [2020-09-25 12:16:33,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:16:33,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:16:33,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:16:33,815 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:16:33,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:16:33,854 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:16:33,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33 WrapperNode [2020-09-25 12:16:33,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:16:33,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:16:33,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:16:33,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:16:33,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33" (1/1) ... [2020-09-25 12:16:33,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33" (1/1) ... [2020-09-25 12:16:33,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33" (1/1) ... [2020-09-25 12:16:33,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33" (1/1) ... [2020-09-25 12:16:33,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33" (1/1) ... [2020-09-25 12:16:33,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33" (1/1) ... [2020-09-25 12:16:33,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33" (1/1) ... [2020-09-25 12:16:33,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:16:33,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:16:33,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:16:33,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:16:33,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:16:34,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:16:34,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:16:34,076 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-25 12:16:34,076 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-25 12:16:34,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:16:34,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 12:16:34,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:16:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-25 12:16:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-25 12:16:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:16:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:16:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:16:34,311 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:16:34,311 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 12:16:34,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:16:34 BoogieIcfgContainer [2020-09-25 12:16:34,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:16:34,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:16:34,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:16:34,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:16:34,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:16:33" (1/3) ... [2020-09-25 12:16:34,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbd5b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:16:34, skipping insertion in model container [2020-09-25 12:16:34,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:16:33" (2/3) ... [2020-09-25 12:16:34,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbd5b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:16:34, skipping insertion in model container [2020-09-25 12:16:34,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:16:34" (3/3) ... [2020-09-25 12:16:34,326 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-25 12:16:34,338 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:16:34,348 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:16:34,372 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:16:34,406 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:16:34,407 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:16:34,407 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:16:34,407 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:16:34,408 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:16:34,408 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:16:34,408 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:16:34,408 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:16:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-25 12:16:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 12:16:34,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:16:34,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:16:34,442 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:16:34,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:16:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-09-25 12:16:34,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:16:34,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516016509] [2020-09-25 12:16:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:16:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:34,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:34,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:34,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:16:34,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:34,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-25 12:16:34,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:34,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:16:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 12:16:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:16:34,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:16:34,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:16:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:34,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:34,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:34,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:16:34,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:34,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:16:34,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:34,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:34,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:16:34,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:34,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:16:34,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:34,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 12:16:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:34,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:34,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:34,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:16:34,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:34,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 12:16:34,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:34,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:16:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:16:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:34,913 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 12:16:34,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516016509] [2020-09-25 12:16:34,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:16:34,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:16:34,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434236874] [2020-09-25 12:16:34,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:16:34,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:16:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:16:34,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:16:34,960 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-09-25 12:16:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:16:35,076 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-25 12:16:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:16:35,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 12:16:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:16:35,091 INFO L225 Difference]: With dead ends: 51 [2020-09-25 12:16:35,091 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 12:16:35,095 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 [2020-09-25 12:16:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 12:16:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-25 12:16:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 12:16:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-25 12:16:35,149 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-09-25 12:16:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:16:35,150 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-25 12:16:35,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:16:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-25 12:16:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 12:16:35,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:16:35,153 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] [2020-09-25 12:16:35,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:16:35,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:16:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:16:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-09-25 12:16:35,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:16:35,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052476315] [2020-09-25 12:16:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:16:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:35,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:35,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:35,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 12:16:35,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:35,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-09-25 12:16:35,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:35,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 12:16:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 12:16:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 12:16:35,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:35,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:16:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:35,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:35,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:35,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:16:35,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:35,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:16:35,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:35,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:35,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:16:35,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:35,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:16:35,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:35,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 12:16:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:35,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:35,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 12:16:35,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:35,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-09-25 12:16:35,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:35,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:16:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 12:16:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:35,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 12:16:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:35,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:35,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:35,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:16:35,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:35,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 12:16:35,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:35,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:35,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:16:35,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:35,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:16:35,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:35,894 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 12:16:35,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052476315] [2020-09-25 12:16:35,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:16:35,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 12:16:35,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043448776] [2020-09-25 12:16:35,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 12:16:35,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:16:35,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 12:16:35,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 12:16:35,901 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-09-25 12:16:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:16:36,020 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-09-25 12:16:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 12:16:36,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-25 12:16:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:16:36,022 INFO L225 Difference]: With dead ends: 66 [2020-09-25 12:16:36,023 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 12:16:36,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:16:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 12:16:36,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 12:16:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 12:16:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-25 12:16:36,034 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-09-25 12:16:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:16:36,034 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-25 12:16:36,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 12:16:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-25 12:16:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 12:16:36,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:16:36,036 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 12:16:36,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:16:36,037 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:16:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:16:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-09-25 12:16:36,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:16:36,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139734463] [2020-09-25 12:16:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:16:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:36,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:36,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:36,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:36,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:36,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 12:16:36,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:16:36,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-09-25 12:16:36,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:36,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 12:16:36,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 12:16:36,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 12:16:36,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:16:36,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:16:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:36,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:36,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:36,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:16:36,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:36,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:16:36,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:36,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:16:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:16:36,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:36,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 12:16:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:36,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:36,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:36,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:37,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:37,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 12:16:37,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:16:37,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-09-25 12:16:37,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:37,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:16:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 12:16:37,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:37,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 12:16:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:37,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:37,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:37,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:37,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 12:16:37,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:16:37,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-09-25 12:16:37,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:37,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:37,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:16:37,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:37,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 12:16:37,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:37,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 12:16:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:37,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:37,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:37,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:16:37,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:37,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 12:16:37,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:37,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:37,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:16:37,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:37,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:16:37,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 12:16:37,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139734463] [2020-09-25 12:16:37,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:16:37,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 12:16:37,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666263691] [2020-09-25 12:16:37,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 12:16:37,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:16:37,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 12:16:37,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 12:16:37,700 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2020-09-25 12:16:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:16:37,757 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-09-25 12:16:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:16:37,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-25 12:16:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:16:37,759 INFO L225 Difference]: With dead ends: 69 [2020-09-25 12:16:37,760 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 12:16:37,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:16:37,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 12:16:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-25 12:16:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 12:16:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-25 12:16:37,770 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-25 12:16:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:16:37,770 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-25 12:16:37,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 12:16:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-25 12:16:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 12:16:37,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:16:37,772 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 12:16:37,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:16:37,773 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:16:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:16:37,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-09-25 12:16:37,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:16:37,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868286492] [2020-09-25 12:16:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:16:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:37,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:37,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:38,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:38,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 12:16:38,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:16:38,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-09-25 12:16:38,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:38,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:16:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 12:16:38,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:16:38,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:38,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:16:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:38,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:38,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:38,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:16:38,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:38,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:16:38,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:38,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:16:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:16:38,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:38,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 12:16:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:38,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:38,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:38,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 12:16:38,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:16:38,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-09-25 12:16:38,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:38,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:16:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:38,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 12:16:38,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:38,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 12:16:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:38,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:38,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:38,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 12:16:38,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:16:38,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-25 12:16:38,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:38,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:38,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:16:38,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 12:16:38,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:16:38,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:38,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 12:16:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:16:38,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:16:38,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:16:38,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:16:38,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:16:38,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 12:16:38,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:16:38,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:16:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:16:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:16:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:16:38,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:16:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 12:16:38,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868286492] [2020-09-25 12:16:38,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:16:38,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 12:16:38,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394169717] [2020-09-25 12:16:38,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 12:16:38,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:16:38,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 12:16:38,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 12:16:38,565 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 8 states. [2020-09-25 12:16:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:16:38,660 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-09-25 12:16:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 12:16:38,663 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-25 12:16:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:16:38,665 INFO L225 Difference]: With dead ends: 84 [2020-09-25 12:16:38,665 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 12:16:38,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:16:38,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 12:16:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-09-25 12:16:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 12:16:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-09-25 12:16:38,683 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2020-09-25 12:16:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:16:38,686 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-09-25 12:16:38,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 12:16:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-09-25 12:16:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 12:16:38,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:16:38,690 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 12:16:38,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:16:38,691 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:16:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:16:38,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-09-25 12:16:38,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:16:38,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337972119] [2020-09-25 12:16:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:16:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 12:16:38,708 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 12:16:38,708 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 12:16:38,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:16:38,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:16:38 BoogieIcfgContainer [2020-09-25 12:16:38,742 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 12:16:38,746 INFO L168 Benchmark]: Toolchain (without parser) took 5195.17 ms. Allocated memory was 145.8 MB in the beginning and 243.3 MB in the end (delta: 97.5 MB). Free memory was 102.9 MB in the beginning and 170.8 MB in the end (delta: -67.8 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. [2020-09-25 12:16:38,747 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 12:16:38,750 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.26 ms. Allocated memory is still 145.8 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 12:16:38,752 INFO L168 Benchmark]: Boogie Preprocessor took 126.99 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 92.8 MB in the beginning and 183.7 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-25 12:16:38,759 INFO L168 Benchmark]: RCFGBuilder took 333.02 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 170.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 12:16:38,760 INFO L168 Benchmark]: TraceAbstraction took 4424.33 ms. Allocated memory was 205.5 MB in the beginning and 243.3 MB in the end (delta: 37.7 MB). Free memory was 170.1 MB in the beginning and 170.8 MB in the end (delta: -713.6 kB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. [2020-09-25 12:16:38,771 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.26 ms. Allocated memory is still 145.8 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.99 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 92.8 MB in the beginning and 183.7 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.02 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 170.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4424.33 ms. Allocated memory was 205.5 MB in the beginning and 243.3 MB in the end (delta: 37.7 MB). Free memory was 170.1 MB in the beginning and 170.8 MB in the end (delta: -713.6 kB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 159 SDtfs, 16 SDslu, 780 SDs, 0 SdLazy, 113 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 8295 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...