/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=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:29:52,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:29:52,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:29:52,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:29:52,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:29:52,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:29:52,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:29:52,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:29:52,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:29:52,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:29:52,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:29:52,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:29:52,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:29:52,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:29:52,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:29:52,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:29:52,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:29:52,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:29:52,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:29:52,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:29:52,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:29:52,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:29:52,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:29:52,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:29:52,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:29:52,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:29:52,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:29:52,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:29:52,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:29:52,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:29:52,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:29:52,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:29:52,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:29:52,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:29:52,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:29:52,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:29:52,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:29:52,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:29:52,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:29:52,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:29:52,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:29:52,411 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 [2020-09-24 18:29:52,438 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:29:52,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:29:52,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:29:52,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:29:52,441 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:29:52,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:29:52,441 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:29:52,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:29:52,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:29:52,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:29:52,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:29:52,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:29:52,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:29:52,443 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:29:52,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:29:52,443 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:29:52,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:29:52,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:29:52,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:29:52,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:29:52,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:29:52,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:52,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:29:52,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:29:52,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:29:52,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:29:52,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:29:52,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:29:52,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:29:52,448 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:29:53,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:29:53,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:29:53,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:29:53,034 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:29:53,035 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:29:53,036 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-09-24 18:29:53,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9d89b5f6/b3c43494198f4c1c97b78978cca669ed/FLAGbcbf51bfd [2020-09-24 18:29:53,725 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:29:53,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-09-24 18:29:53,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9d89b5f6/b3c43494198f4c1c97b78978cca669ed/FLAGbcbf51bfd [2020-09-24 18:29:54,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9d89b5f6/b3c43494198f4c1c97b78978cca669ed [2020-09-24 18:29:54,071 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:29:54,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:29:54,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:54,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:29:54,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:29:54,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:54" (1/1) ... [2020-09-24 18:29:54,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3155a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54, skipping insertion in model container [2020-09-24 18:29:54,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:54" (1/1) ... [2020-09-24 18:29:54,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:29:54,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:29:54,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:54,357 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:29:54,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:54,414 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:29:54,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54 WrapperNode [2020-09-24 18:29:54,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:54,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:29:54,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:29:54,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:29:54,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54" (1/1) ... [2020-09-24 18:29:54,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54" (1/1) ... [2020-09-24 18:29:54,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54" (1/1) ... [2020-09-24 18:29:54,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54" (1/1) ... [2020-09-24 18:29:54,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54" (1/1) ... [2020-09-24 18:29:54,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54" (1/1) ... [2020-09-24 18:29:54,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54" (1/1) ... [2020-09-24 18:29:54,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:29:54,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:29:54,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:29:54,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:29:54,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54" (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 [2020-09-24 18:29:54,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:29:54,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:29:54,642 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 18:29:54,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:29:54,642 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:29:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:29:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:29:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 18:29:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:29:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 18:29:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:29:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 18:29:54,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 18:29:54,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 18:29:54,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:29:54,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:29:54,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 18:29:55,022 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:29:55,022 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 18:29:55,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:55 BoogieIcfgContainer [2020-09-24 18:29:55,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:29:55,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:29:55,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:29:55,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:29:55,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:29:54" (1/3) ... [2020-09-24 18:29:55,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4403b451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:55, skipping insertion in model container [2020-09-24 18:29:55,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:54" (2/3) ... [2020-09-24 18:29:55,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4403b451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:55, skipping insertion in model container [2020-09-24 18:29:55,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:55" (3/3) ... [2020-09-24 18:29:55,038 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2020-09-24 18:29:55,050 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:29:55,060 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:29:55,082 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:29:55,112 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:29:55,112 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:29:55,112 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:29:55,112 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:29:55,112 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:29:55,113 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:29:55,113 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:29:55,113 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:29:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-09-24 18:29:55,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 18:29:55,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:55,144 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:55,145 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1727331883, now seen corresponding path program 1 times [2020-09-24 18:29:55,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:55,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961304061] [2020-09-24 18:29:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:55,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:56,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 18:29:56,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:56,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-09-24 18:29:56,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:56,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 18:29:56,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 18:29:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 18:29:56,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:29:56,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:56,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:56,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:56,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:56,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 18:29:56,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:56,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:56,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:56,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 18:29:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:56,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:56,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:29:56,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:56,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 18:29:56,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:56,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:56,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 18:29:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:56,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:56,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:29:56,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:56,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 18:29:56,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:56,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:29:56,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:56,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:29:56,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:29:56,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961304061] [2020-09-24 18:29:56,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:56,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 18:29:56,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683426721] [2020-09-24 18:29:56,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:29:56,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:56,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:29:56,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:29:56,735 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 9 states. [2020-09-24 18:29:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:57,249 INFO L93 Difference]: Finished difference Result 141 states and 174 transitions. [2020-09-24 18:29:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:29:57,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-24 18:29:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:57,266 INFO L225 Difference]: With dead ends: 141 [2020-09-24 18:29:57,266 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 18:29:57,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:29:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 18:29:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2020-09-24 18:29:57,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 18:29:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-24 18:29:57,325 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 30 [2020-09-24 18:29:57,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:57,325 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-24 18:29:57,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:29:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-24 18:29:57,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 18:29:57,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:57,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:57,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:29:57,329 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:57,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:57,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1086220015, now seen corresponding path program 1 times [2020-09-24 18:29:57,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:57,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17694494] [2020-09-24 18:29:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:57,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 18:29:57,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:57,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 18:29:57,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:29:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 18:29:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 18:29:57,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:57,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:57,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:57,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:57,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:57,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:29:57,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:57,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:57,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:57,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 18:29:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:57,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:57,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:29:57,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:57,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 18:29:57,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:29:57,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:57,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:29:57,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:57,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 18:29:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:57,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:57,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:29:57,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:57,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 18:29:57,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:57,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:29:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:29:57,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 18:29:57,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17694494] [2020-09-24 18:29:57,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:57,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:29:57,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518406073] [2020-09-24 18:29:57,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:29:57,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:29:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:29:57,557 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2020-09-24 18:29:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:57,755 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-09-24 18:29:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:29:57,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-09-24 18:29:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:57,758 INFO L225 Difference]: With dead ends: 91 [2020-09-24 18:29:57,758 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 18:29:57,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:29:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 18:29:57,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-09-24 18:29:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 18:29:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-09-24 18:29:57,773 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 34 [2020-09-24 18:29:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:57,773 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-09-24 18:29:57,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:29:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-09-24 18:29:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 18:29:57,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:57,778 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:57,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:29:57,779 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:57,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1811286385, now seen corresponding path program 1 times [2020-09-24 18:29:57,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:57,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636865809] [2020-09-24 18:29:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:57,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:58,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:58,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:58,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:02,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:02,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 18:30:02,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:30:02,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 18:30:02,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 18:30:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-24 18:30:02,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 18:30:02,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:30:03,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:30:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:03,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:03,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:03,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:30:03,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:03,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:30:03,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:03,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:30:03,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:03,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:30:03,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:30:03,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 18:30:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:03,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:03,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:30:03,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:03,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:30:03,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:03,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:30:03,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:03,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:30:03,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:30:03,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 18:30:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:03,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:03,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:03,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:30:03,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:03,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:30:03,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:30:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:30:03,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:30:03,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 18:30:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:03,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:03,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:30:03,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:03,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 18:30:03,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:03,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:30:03,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:03,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:30:03,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:30:03,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 18:30:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:03,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:03,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:03,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:30:03,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:03,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 18:30:03,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:03,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:30:03,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:30:03,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:30:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 18:30:03,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636865809] [2020-09-24 18:30:03,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:30:03,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:30:03,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264895438] [2020-09-24 18:30:03,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:30:03,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:30:03,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:30:03,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:30:03,209 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 11 states. [2020-09-24 18:30:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:30:03,779 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-09-24 18:30:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 18:30:03,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-09-24 18:30:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:30:03,782 INFO L225 Difference]: With dead ends: 82 [2020-09-24 18:30:03,782 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 18:30:03,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-09-24 18:30:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 18:30:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-09-24 18:30:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 18:30:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-24 18:30:03,794 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 52 [2020-09-24 18:30:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:30:03,795 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-24 18:30:03,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:30:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-24 18:30:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 18:30:03,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:30:03,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:30:03,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:30:03,797 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:30:03,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:30:03,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2082234165, now seen corresponding path program 1 times [2020-09-24 18:30:03,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:30:03,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513074856] [2020-09-24 18:30:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:30:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:03,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:05,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:06,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:06,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 18:30:06,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:30:06,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2823 [2020-09-24 18:30:06,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:06,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 18:30:06,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-24 18:30:06,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 18:30:06,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:30:07,542 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-09-24 18:30:12,788 WARN L193 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 139 DAG size of output: 87 [2020-09-24 18:30:27,873 WARN L193 SmtUtils]: Spent 15.01 s on a formula simplification. DAG size of input: 147 DAG size of output: 100 [2020-09-24 18:30:31,469 WARN L193 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 256 DAG size of output: 102 [2020-09-24 18:30:38,408 WARN L193 SmtUtils]: Spent 6.86 s on a formula simplification. DAG size of input: 129 DAG size of output: 93 [2020-09-24 18:30:47,684 WARN L193 SmtUtils]: Spent 9.19 s on a formula simplification. DAG size of input: 134 DAG size of output: 87