/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 07:25:09,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 07:25:09,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 07:25:09,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 07:25:09,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 07:25:09,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 07:25:09,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 07:25:09,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 07:25:09,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 07:25:09,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 07:25:09,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 07:25:09,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 07:25:09,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 07:25:09,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 07:25:09,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 07:25:09,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 07:25:09,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 07:25:09,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 07:25:09,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 07:25:09,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 07:25:09,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 07:25:09,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 07:25:09,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 07:25:09,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 07:25:09,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 07:25:09,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 07:25:09,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 07:25:09,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 07:25:09,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 07:25:09,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 07:25:09,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 07:25:09,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 07:25:09,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 07:25:09,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 07:25:09,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 07:25:09,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 07:25:09,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 07:25:09,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 07:25:09,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 07:25:09,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 07:25:09,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 07:25:09,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 07:25:09,477 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 07:25:09,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 07:25:09,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 07:25:09,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 07:25:09,480 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 07:25:09,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 07:25:09,480 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 07:25:09,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 07:25:09,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 07:25:09,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 07:25:09,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 07:25:09,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 07:25:09,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 07:25:09,482 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 07:25:09,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 07:25:09,483 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 07:25:09,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 07:25:09,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 07:25:09,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 07:25:09,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 07:25:09,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 07:25:09,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 07:25:09,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 07:25:09,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 07:25:09,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 07:25:09,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 07:25:09,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 07:25:09,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 07:25:09,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 07:25:09,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 07:25:09,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 07:25:09,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 07:25:09,820 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 07:25:09,822 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 07:25:09,822 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 07:25:09,823 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-10-14 07:25:09,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3683f4d08/340564d60a604f16a880ff9fc03e1cd4/FLAGb61f656d4 [2020-10-14 07:25:10,296 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 07:25:10,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/gcd01-1.c [2020-10-14 07:25:10,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3683f4d08/340564d60a604f16a880ff9fc03e1cd4/FLAGb61f656d4 [2020-10-14 07:25:10,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3683f4d08/340564d60a604f16a880ff9fc03e1cd4 [2020-10-14 07:25:10,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 07:25:10,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 07:25:10,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 07:25:10,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 07:25:10,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 07:25:10,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:25:10" (1/1) ... [2020-10-14 07:25:10,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78985504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10, skipping insertion in model container [2020-10-14 07:25:10,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:25:10" (1/1) ... [2020-10-14 07:25:10,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 07:25:10,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 07:25:10,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 07:25:10,897 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 07:25:10,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 07:25:10,934 INFO L208 MainTranslator]: Completed translation [2020-10-14 07:25:10,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10 WrapperNode [2020-10-14 07:25:10,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 07:25:10,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 07:25:10,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 07:25:10,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 07:25:10,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10" (1/1) ... [2020-10-14 07:25:10,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10" (1/1) ... [2020-10-14 07:25:11,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10" (1/1) ... [2020-10-14 07:25:11,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10" (1/1) ... [2020-10-14 07:25:11,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10" (1/1) ... [2020-10-14 07:25:11,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10" (1/1) ... [2020-10-14 07:25:11,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10" (1/1) ... [2020-10-14 07:25:11,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 07:25:11,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 07:25:11,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 07:25:11,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 07:25:11,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 07:25:11,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 07:25:11,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 07:25:11,145 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-10-14 07:25:11,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 07:25:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 07:25:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 07:25:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-10-14 07:25:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 07:25:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 07:25:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 07:25:11,347 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 07:25:11,348 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 07:25:11,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:25:11 BoogieIcfgContainer [2020-10-14 07:25:11,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 07:25:11,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 07:25:11,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 07:25:11,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 07:25:11,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:25:10" (1/3) ... [2020-10-14 07:25:11,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39467aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:25:11, skipping insertion in model container [2020-10-14 07:25:11,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:25:10" (2/3) ... [2020-10-14 07:25:11,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39467aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:25:11, skipping insertion in model container [2020-10-14 07:25:11,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:25:11" (3/3) ... [2020-10-14 07:25:11,360 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-10-14 07:25:11,371 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 07:25:11,379 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 07:25:11,395 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 07:25:11,420 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 07:25:11,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 07:25:11,421 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 07:25:11,421 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 07:25:11,421 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 07:25:11,421 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 07:25:11,422 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 07:25:11,422 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 07:25:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-14 07:25:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 07:25:11,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:11,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:25:11,459 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-10-14 07:25:11,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:11,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294141139] [2020-10-14 07:25:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:11,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:11,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:11,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:11,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 07:25:11,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:11,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-14 07:25:11,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:11,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:25:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 07:25:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 07:25:11,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 07:25:11,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:11,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:11,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:11,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:25:11,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:11,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 07:25:11,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:11,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:11,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:11,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:11,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:11,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:11,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 07:25:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:11,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:11,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:11,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:25:11,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:11,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-14 07:25:11,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:11,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:11,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:25:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 07:25:11,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:25:12,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294141139] [2020-10-14 07:25:12,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:25:12,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 07:25:12,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568311855] [2020-10-14 07:25:12,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 07:25:12,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:12,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 07:25:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 07:25:12,037 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-10-14 07:25:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:12,155 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-10-14 07:25:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 07:25:12,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 07:25:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:12,167 INFO L225 Difference]: With dead ends: 38 [2020-10-14 07:25:12,167 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 07:25:12,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 07:25:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 07:25:12,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 07:25:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 07:25:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-14 07:25:12,211 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-10-14 07:25:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:12,211 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-14 07:25:12,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 07:25:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-14 07:25:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 07:25:12,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:12,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:25:12,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 07:25:12,214 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:12,215 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-10-14 07:25:12,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:12,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358862270] [2020-10-14 07:25:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:12,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:12,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:12,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:12,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 07:25:12,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:12,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-14 07:25:12,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:12,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 07:25:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 07:25:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 07:25:12,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:12,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:12,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:12,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:12,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:25:12,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:12,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:25:12,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:12,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:12,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:12,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:12,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 07:25:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:12,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:12,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:12,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 07:25:12,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:12,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-14 07:25:12,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:12,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:25:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 07:25:12,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:25:12,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358862270] [2020-10-14 07:25:12,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:25:12,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 07:25:12,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382709562] [2020-10-14 07:25:12,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 07:25:12,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:12,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 07:25:12,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 07:25:12,501 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-10-14 07:25:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:12,611 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-14 07:25:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 07:25:12,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 07:25:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:12,613 INFO L225 Difference]: With dead ends: 30 [2020-10-14 07:25:12,613 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 07:25:12,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 07:25:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 07:25:12,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-14 07:25:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 07:25:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-14 07:25:12,622 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-10-14 07:25:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:12,622 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-14 07:25:12,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 07:25:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-14 07:25:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 07:25:12,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:12,624 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] [2020-10-14 07:25:12,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 07:25:12,625 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:12,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-10-14 07:25:12,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:12,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992729406] [2020-10-14 07:25:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:12,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:12,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:12,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:12,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:12,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 07:25:12,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 07:25:12,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-14 07:25:12,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:12,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:12,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 07:25:12,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 07:25:12,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 07:25:12,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:12,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:12,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:12,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:25:12,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:12,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:25:12,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:12,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:12,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:12,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:12,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:12,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 07:25:12,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 07:25:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:12,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:13,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:13,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 07:25:13,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:13,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-14 07:25:13,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:13,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 07:25:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:13,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 07:25:13,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:13,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:13,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:13,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:13,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:25:13,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:13,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-14 07:25:13,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:13,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:13,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:25:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 07:25:13,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 07:25:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 07:25:13,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992729406] [2020-10-14 07:25:13,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:25:13,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 07:25:13,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234435183] [2020-10-14 07:25:13,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 07:25:13,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:13,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 07:25:13,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 07:25:13,156 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 8 states. [2020-10-14 07:25:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:13,388 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-10-14 07:25:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 07:25:13,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 07:25:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:13,391 INFO L225 Difference]: With dead ends: 35 [2020-10-14 07:25:13,391 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 07:25:13,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-14 07:25:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 07:25:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-10-14 07:25:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 07:25:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-14 07:25:13,418 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 23 [2020-10-14 07:25:13,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:13,419 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-14 07:25:13,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 07:25:13,419 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-14 07:25:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 07:25:13,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:13,422 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] [2020-10-14 07:25:13,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 07:25:13,423 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:13,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-10-14 07:25:13,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:13,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777394830] [2020-10-14 07:25:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:13,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:13,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:13,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:13,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:13,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 07:25:13,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 07:25:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-14 07:25:13,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:13,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:13,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:25:13,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 07:25:13,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 07:25:13,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:13,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:13,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:13,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:13,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:25:13,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:13,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:25:13,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:13,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:13,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:13,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:13,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:13,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 07:25:13,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 07:25:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:13,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:13,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:13,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:13,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 07:25:13,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:13,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-14 07:25:13,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:13,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:13,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:25:13,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:13,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 07:25:13,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:13,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:13,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:13,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:13,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:25:13,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:13,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 07:25:13,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:13,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:25:13,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:13,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 07:25:13,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 07:25:13,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777394830] [2020-10-14 07:25:13,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:25:13,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 07:25:13,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905433670] [2020-10-14 07:25:13,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 07:25:13,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 07:25:13,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 07:25:13,837 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 9 states. [2020-10-14 07:25:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:14,040 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-14 07:25:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 07:25:14,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-14 07:25:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:14,044 INFO L225 Difference]: With dead ends: 39 [2020-10-14 07:25:14,044 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 07:25:14,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-14 07:25:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 07:25:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-14 07:25:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 07:25:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-10-14 07:25:14,060 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 23 [2020-10-14 07:25:14,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:14,060 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-10-14 07:25:14,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 07:25:14,060 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-10-14 07:25:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 07:25:14,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:14,064 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] [2020-10-14 07:25:14,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 07:25:14,065 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-10-14 07:25:14,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:14,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073332801] [2020-10-14 07:25:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:14,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:14,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 07:25:14,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 07:25:14,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-14 07:25:14,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:14,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:14,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 07:25:14,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 07:25:14,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 07:25:14,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:14,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:14,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:14,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:25:14,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:14,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:25:14,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:14,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:14,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:14,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:14,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:14,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:14,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 07:25:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:14,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:14,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 07:25:14,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 07:25:14,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-14 07:25:14,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:14,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:14,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:25:14,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:14,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 07:25:14,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:14,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:14,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:14,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 07:25:14,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:14,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 07:25:14,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:14,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:14,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:25:14,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:14,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:25:14,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 07:25:14,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073332801] [2020-10-14 07:25:14,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 07:25:14,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 07:25:14,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602925937] [2020-10-14 07:25:14,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 07:25:14,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 07:25:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 07:25:14,602 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 8 states. [2020-10-14 07:25:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:14,678 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-10-14 07:25:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 07:25:14,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 07:25:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:14,681 INFO L225 Difference]: With dead ends: 39 [2020-10-14 07:25:14,681 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 07:25:14,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-14 07:25:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 07:25:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-14 07:25:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 07:25:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-14 07:25:14,689 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 24 [2020-10-14 07:25:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:14,690 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-14 07:25:14,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 07:25:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-14 07:25:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 07:25:14,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:14,691 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] [2020-10-14 07:25:14,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 07:25:14,692 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-10-14 07:25:14,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:14,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119885831] [2020-10-14 07:25:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:14,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:14,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:15,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 07:25:15,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 07:25:15,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-14 07:25:15,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:15,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:15,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 07:25:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 07:25:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 07:25:15,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 07:25:15,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:15,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:15,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:25:15,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:15,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:25:15,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:15,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:15,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:15,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:15,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:15,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:15,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 07:25:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:15,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:15,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 07:25:15,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 07:25:15,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-14 07:25:15,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:15,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:15,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:25:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 07:25:15,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:15,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:15,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 07:25:15,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:15,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 07:25:15,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:15,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:15,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:25:15,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:15,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:25:15,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 07:25:15,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119885831] [2020-10-14 07:25:15,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:25:15,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 07:25:15,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363382986] [2020-10-14 07:25:15,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 07:25:15,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:15,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 07:25:15,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 07:25:15,260 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-10-14 07:25:15,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:15,314 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-10-14 07:25:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 07:25:15,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 07:25:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:15,316 INFO L225 Difference]: With dead ends: 39 [2020-10-14 07:25:15,316 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 07:25:15,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 07:25:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 07:25:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-14 07:25:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 07:25:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-14 07:25:15,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 24 [2020-10-14 07:25:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:15,324 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-14 07:25:15,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 07:25:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-14 07:25:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 07:25:15,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:15,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:25:15,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 07:25:15,326 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:15,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:15,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1008405900, now seen corresponding path program 1 times [2020-10-14 07:25:15,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:15,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370148696] [2020-10-14 07:25:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:15,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:15,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 07:25:15,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:15,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-14 07:25:15,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:15,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:15,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:25:15,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 07:25:15,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 07:25:15,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:15,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:15,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:15,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:25:15,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:15,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:25:15,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:15,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:15,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 07:25:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:15,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:15,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 07:25:15,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:15,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-14 07:25:15,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:15,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:25:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 07:25:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 07:25:15,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:15,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:15,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:15,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 07:25:15,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:15,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-14 07:25:15,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:15,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:25:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 07:25:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 07:25:15,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:15,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:15,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:15,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:15,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:25:15,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:15,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 07:25:15,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:15,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:15,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:25:15,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:15,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 07:25:15,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 07:25:15,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370148696] [2020-10-14 07:25:15,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:25:15,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 07:25:15,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316192169] [2020-10-14 07:25:15,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 07:25:15,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:15,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 07:25:15,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 07:25:15,954 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2020-10-14 07:25:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:16,162 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-10-14 07:25:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 07:25:16,163 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-14 07:25:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:16,164 INFO L225 Difference]: With dead ends: 51 [2020-10-14 07:25:16,164 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 07:25:16,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-14 07:25:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 07:25:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-14 07:25:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 07:25:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-14 07:25:16,173 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 31 [2020-10-14 07:25:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:16,173 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-14 07:25:16,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 07:25:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-14 07:25:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 07:25:16,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:16,175 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] [2020-10-14 07:25:16,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 07:25:16,175 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:16,176 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-10-14 07:25:16,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:16,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156742607] [2020-10-14 07:25:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:16,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:16,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:16,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:16,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:16,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:16,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:17,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:17,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 07:25:17,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 07:25:17,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1475 [2020-10-14 07:25:17,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:17,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 07:25:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 07:25:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 07:25:17,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 07:25:17,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:17,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:17,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:17,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:25:17,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:17,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 07:25:17,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:17,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:17,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:17,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:17,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:17,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 07:25:17,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 07:25:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:17,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:17,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:17,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:17,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:17,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:18,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 07:25:18,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 07:25:18,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-14 07:25:18,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:18,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:25:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 07:25:18,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:18,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:18,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 07:25:18,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 07:25:18,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-14 07:25:18,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:18,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:25:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 07:25:18,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:18,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:18,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 07:25:18,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:18,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 07:25:18,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:18,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:25:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:25:18,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 07:25:18,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156742607] [2020-10-14 07:25:18,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 07:25:18,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 07:25:18,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160892155] [2020-10-14 07:25:18,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 07:25:18,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:18,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 07:25:18,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 07:25:18,485 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 9 states. [2020-10-14 07:25:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:18,586 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-14 07:25:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 07:25:18,587 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-14 07:25:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:18,588 INFO L225 Difference]: With dead ends: 42 [2020-10-14 07:25:18,588 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 07:25:18,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-14 07:25:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 07:25:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 07:25:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 07:25:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-14 07:25:18,594 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 32 [2020-10-14 07:25:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:18,594 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-14 07:25:18,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 07:25:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-14 07:25:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 07:25:18,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:25:18,596 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:25:18,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 07:25:18,596 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:25:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:25:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash 240924720, now seen corresponding path program 2 times [2020-10-14 07:25:18,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:25:18,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253702357] [2020-10-14 07:25:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:25:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:18,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:18,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 07:25:18,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:18,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-14 07:25:18,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:18,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:18,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:25:18,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 07:25:18,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 07:25:18,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:18,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:25:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:18,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:18,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:25:18,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:18,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 07:25:18,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:18,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:18,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:25:18,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:25:18,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:25:18,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 07:25:18,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 07:25:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:18,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:18,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 07:25:18,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:25:18,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-14 07:25:18,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:18,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:25:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 07:25:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 07:25:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:18,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:18,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:18,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 07:25:18,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:18,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 07:25:18,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:18,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:18,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:25:18,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 07:25:18,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 07:25:18,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:18,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-14 07:25:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:25:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:25:18,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:25:18,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:25:18,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:25:18,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 07:25:18,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:25:18,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:25:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:25:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 07:25:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:25:18,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:25:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 07:25:18,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253702357] [2020-10-14 07:25:18,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:25:18,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 07:25:18,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802384352] [2020-10-14 07:25:18,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 07:25:18,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:25:18,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 07:25:18,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 07:25:18,907 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-10-14 07:25:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:25:18,963 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-14 07:25:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 07:25:18,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-14 07:25:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:25:18,964 INFO L225 Difference]: With dead ends: 26 [2020-10-14 07:25:18,964 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 07:25:18,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 07:25:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 07:25:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 07:25:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 07:25:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 07:25:18,966 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-10-14 07:25:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:25:18,966 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 07:25:18,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 07:25:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 07:25:18,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 07:25:18,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 07:25:18,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 07:25:19,048 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 07:25:19,048 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 07:25:19,049 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-10-14 07:25:19,049 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-10-14 07:25:19,049 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-10-14 07:25:19,049 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-14 07:25:19,049 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-10-14 07:25:19,050 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-10-14 07:25:19,050 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-10-14 07:25:19,050 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-10-14 07:25:19,050 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-10-14 07:25:19,050 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-10-14 07:25:19,050 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 07:25:19,050 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 07:25:19,051 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 07:25:19,051 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 07:25:19,051 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-10-14 07:25:19,051 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-10-14 07:25:19,051 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-10-14 07:25:19,051 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-10-14 07:25:19,052 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-14 07:25:19,052 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-10-14 07:25:19,052 INFO L271 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: true [2020-10-14 07:25:19,052 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-10-14 07:25:19,052 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-10-14 07:25:19,052 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-10-14 07:25:19,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 07:25:19 BoogieIcfgContainer [2020-10-14 07:25:19,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 07:25:19,062 INFO L168 Benchmark]: Toolchain (without parser) took 8418.89 ms. Allocated memory was 146.8 MB in the beginning and 312.5 MB in the end (delta: 165.7 MB). Free memory was 103.2 MB in the beginning and 112.1 MB in the end (delta: -8.8 MB). Peak memory consumption was 156.9 MB. Max. memory is 7.1 GB. [2020-10-14 07:25:19,063 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 07:25:19,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.03 ms. Allocated memory is still 146.8 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-14 07:25:19,065 INFO L168 Benchmark]: Boogie Preprocessor took 142.20 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 93.3 MB in the beginning and 181.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 07:25:19,065 INFO L168 Benchmark]: RCFGBuilder took 271.67 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-10-14 07:25:19,066 INFO L168 Benchmark]: TraceAbstraction took 7706.19 ms. Allocated memory was 203.4 MB in the beginning and 312.5 MB in the end (delta: 109.1 MB). Free memory was 168.2 MB in the beginning and 112.1 MB in the end (delta: 56.2 MB). Peak memory consumption was 165.2 MB. Max. memory is 7.1 GB. [2020-10-14 07:25:19,070 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.03 ms. Allocated memory is still 146.8 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.20 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 93.3 MB in the beginning and 181.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 271.67 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7706.19 ms. Allocated memory was 203.4 MB in the beginning and 312.5 MB in the end (delta: 109.1 MB). Free memory was 168.2 MB in the beginning and 112.1 MB in the end (delta: 56.2 MB). Peak memory consumption was 165.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.5s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 180 SDtfs, 144 SDslu, 666 SDs, 0 SdLazy, 518 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=7, 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, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 34 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 27 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 11896 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 60/62 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...