/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/ldv-regression/test25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:29:47,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:29:47,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:29:47,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:29:47,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:29:47,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:29:47,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:29:47,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:29:47,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:29:47,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:29:47,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:29:47,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:29:47,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:29:47,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:29:47,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:29:47,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:29:47,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:29:47,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:29:47,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:29:47,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:29:47,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:29:47,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:29:47,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:29:47,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:29:47,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:29:47,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:29:47,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:29:47,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:29:47,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:29:47,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:29:47,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:29:47,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:29:47,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:29:47,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:29:47,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:29:47,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:29:47,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:29:47,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:29:47,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:29:47,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:29:47,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:29:47,565 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 23:29:47,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:29:47,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:29:47,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:29:47,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:29:47,589 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:29:47,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:29:47,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:29:47,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:29:47,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:29:47,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:29:47,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:29:47,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:29:47,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:29:47,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:29:47,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:29:47,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:29:47,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:29:47,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:29:47,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:29:47,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:29:47,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:29:47,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:29:47,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:29:47,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:29:47,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:29:47,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:29:47,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:29:47,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:29:47,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:29:47,594 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:29:47,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:29:47,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:29:47,936 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:29:47,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:29:47,938 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:29:47,939 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-14 23:29:48,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cac666f34/57fc05ea25804ac6a996a42c108eaad9/FLAG39fcd8e29 [2020-10-14 23:29:48,471 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:29:48,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-14 23:29:48,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cac666f34/57fc05ea25804ac6a996a42c108eaad9/FLAG39fcd8e29 [2020-10-14 23:29:48,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cac666f34/57fc05ea25804ac6a996a42c108eaad9 [2020-10-14 23:29:48,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:29:48,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:29:48,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:29:48,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:29:48,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:29:48,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:29:48" (1/1) ... [2020-10-14 23:29:48,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326565d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:48, skipping insertion in model container [2020-10-14 23:29:48,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:29:48" (1/1) ... [2020-10-14 23:29:48,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:29:48,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:29:49,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:29:49,111 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:29:49,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:29:49,146 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:29:49,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49 WrapperNode [2020-10-14 23:29:49,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:29:49,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:29:49,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:29:49,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:29:49,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49" (1/1) ... [2020-10-14 23:29:49,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49" (1/1) ... [2020-10-14 23:29:49,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49" (1/1) ... [2020-10-14 23:29:49,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49" (1/1) ... [2020-10-14 23:29:49,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49" (1/1) ... [2020-10-14 23:29:49,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49" (1/1) ... [2020-10-14 23:29:49,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49" (1/1) ... [2020-10-14 23:29:49,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:29:49,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:29:49,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:29:49,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:29:49,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49" (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 23:29:49,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:29:49,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:29:49,338 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-14 23:29:49,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:29:49,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:29:49,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:29:49,339 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 23:29:49,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:29:49,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:29:49,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:29:49,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 23:29:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:29:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:29:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:29:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:29:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:29:49,657 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:29:49,657 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 23:29:49,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:29:49 BoogieIcfgContainer [2020-10-14 23:29:49,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:29:49,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:29:49,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:29:49,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:29:49,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:29:48" (1/3) ... [2020-10-14 23:29:49,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd4ac2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:29:49, skipping insertion in model container [2020-10-14 23:29:49,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:29:49" (2/3) ... [2020-10-14 23:29:49,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd4ac2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:29:49, skipping insertion in model container [2020-10-14 23:29:49,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:29:49" (3/3) ... [2020-10-14 23:29:49,671 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-10-14 23:29:49,682 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:29:49,690 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:29:49,705 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:29:49,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:29:49,732 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:29:49,732 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:29:49,732 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:29:49,732 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:29:49,733 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:29:49,733 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:29:49,733 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:29:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-14 23:29:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:29:49,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:49,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:49,757 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:49,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:49,762 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2020-10-14 23:29:49,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:49,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578365172] [2020-10-14 23:29:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:49,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:49,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:50,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:50,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:29:50,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:50,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-14 23:29:50,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:50,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:50,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:50,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:29:50,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:50,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:29:50,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:50,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:50,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:50,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:50,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:50,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 23:29:50,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:50,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:50,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 23:29:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:50,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:50,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:50,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:50,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:50,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 23:29:50,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:50,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:50,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:50,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:50,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:50,235 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 23:29:50,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578365172] [2020-10-14 23:29:50,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:29:50,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:29:50,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76381954] [2020-10-14 23:29:50,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:29:50,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:29:50,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:29:50,265 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-14 23:29:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:50,364 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-10-14 23:29:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:29:50,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-14 23:29:50,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:50,376 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:29:50,377 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:29:50,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:29:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:29:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 23:29:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 23:29:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-14 23:29:50,420 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-14 23:29:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:50,421 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-14 23:29:50,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:29:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-14 23:29:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:29:50,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:50,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:50,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:29:50,423 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:50,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2020-10-14 23:29:50,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:50,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814149138] [2020-10-14 23:29:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:50,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:50,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:50,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:50,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:29:50,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:50,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-14 23:29:50,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:50,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:50,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:29:50,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:50,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:29:50,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:51,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:51,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:51,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:51,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:51,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:51,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:51,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:51,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:51,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:51,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:51,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:51,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:51,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 23:29:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:51,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:51,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:51,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:51,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:51,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:29:51,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:51,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:51,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:51,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:51,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:51,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:51,076 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 23:29:51,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814149138] [2020-10-14 23:29:51,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:29:51,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:29:51,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436279477] [2020-10-14 23:29:51,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:29:51,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:51,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:29:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:29:51,080 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-14 23:29:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:51,183 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-10-14 23:29:51,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:29:51,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-14 23:29:51,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:51,185 INFO L225 Difference]: With dead ends: 30 [2020-10-14 23:29:51,185 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:29:51,187 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 23:29:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:29:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 23:29:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:29:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-14 23:29:51,194 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-14 23:29:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:51,194 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-14 23:29:51,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:29:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-14 23:29:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:29:51,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:51,195 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:51,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:29:51,196 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:51,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2046677126, now seen corresponding path program 1 times [2020-10-14 23:29:51,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:51,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535314835] [2020-10-14 23:29:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:51,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:51,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:51,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:51,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:29:51,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:51,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-14 23:29:51,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:51,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:51,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:29:51,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:51,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:29:51,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:51,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:51,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:51,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:51,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:51,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:51,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:29:51,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:51,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:51,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:51,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-14 23:29:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:51,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:51,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:51,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:51,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:51,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:29:51,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:51,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:51,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:51,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:29:51,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535314835] [2020-10-14 23:29:51,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:51,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:29:51,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059288119] [2020-10-14 23:29:51,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:29:51,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:51,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:29:51,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:29:51,526 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-10-14 23:29:51,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:51,639 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-14 23:29:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:29:51,640 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 23:29:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:51,641 INFO L225 Difference]: With dead ends: 32 [2020-10-14 23:29:51,641 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 23:29:51,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:29:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 23:29:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 23:29:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 23:29:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-14 23:29:51,647 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2020-10-14 23:29:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:51,648 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-14 23:29:51,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:29:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-14 23:29:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:29:51,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:51,649 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:51,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:29:51,650 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:51,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:51,650 INFO L82 PathProgramCache]: Analyzing trace with hash -98862975, now seen corresponding path program 2 times [2020-10-14 23:29:51,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:51,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053386173] [2020-10-14 23:29:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:51,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:51,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:51,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:29:51,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:51,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-14 23:29:51,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:51,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:51,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:29:51,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:51,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:29:51,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:52,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:52,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:52,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:52,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:52,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:29:52,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:52,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:52,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:52,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 23:29:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:52,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:52,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:52,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:52,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:52,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:52,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:52,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:52,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:29:52,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053386173] [2020-10-14 23:29:52,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:52,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:29:52,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291073649] [2020-10-14 23:29:52,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:29:52,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:52,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:29:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:29:52,048 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-10-14 23:29:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:52,174 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-14 23:29:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:29:52,175 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 23:29:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:52,176 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:29:52,176 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:29:52,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:29:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:29:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 23:29:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:29:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-14 23:29:52,182 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-10-14 23:29:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:52,183 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-14 23:29:52,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:29:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-14 23:29:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:29:52,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:52,184 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:52,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:29:52,184 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash -378597956, now seen corresponding path program 3 times [2020-10-14 23:29:52,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:52,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037124] [2020-10-14 23:29:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:52,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:52,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:52,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:52,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:29:52,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:52,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-14 23:29:52,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:52,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:52,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:29:52,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:52,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:29:52,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:52,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:52,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:52,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:52,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:52,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:52,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:29:52,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:52,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:52,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:52,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:52,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:52,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:52,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 23:29:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:52,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:52,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:52,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:52,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:52,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:29:52,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:52,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:29:52,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037124] [2020-10-14 23:29:52,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:52,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:29:52,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303144913] [2020-10-14 23:29:52,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:29:52,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:52,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:29:52,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:29:52,711 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-10-14 23:29:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:52,926 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-10-14 23:29:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:29:52,927 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:29:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:52,928 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:29:52,928 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:29:52,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:29:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:29:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 23:29:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 23:29:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-14 23:29:52,940 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-10-14 23:29:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:52,941 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-14 23:29:52,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:29:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-14 23:29:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:29:52,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:52,944 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:52,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:29:52,945 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:52,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1379024951, now seen corresponding path program 4 times [2020-10-14 23:29:52,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:52,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600006968] [2020-10-14 23:29:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:52,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:52,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:53,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:53,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:29:53,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:53,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-14 23:29:53,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:53,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:53,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:29:53,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:53,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:29:53,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:53,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:53,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:53,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:53,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:53,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:53,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:53,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:53,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:53,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:53,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:53,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:53,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:53,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 23:29:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:53,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:53,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:53,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:53,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:53,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:53,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:53,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:53,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:29:53,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600006968] [2020-10-14 23:29:53,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:53,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:29:53,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270657315] [2020-10-14 23:29:53,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:29:53,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:53,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:29:53,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:29:53,487 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 10 states. [2020-10-14 23:29:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:53,661 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-10-14 23:29:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:29:53,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 23:29:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:53,662 INFO L225 Difference]: With dead ends: 38 [2020-10-14 23:29:53,663 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 23:29:53,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:29:53,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 23:29:53,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-14 23:29:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:29:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-14 23:29:53,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2020-10-14 23:29:53,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:53,669 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-14 23:29:53,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:29:53,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-14 23:29:53,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:29:53,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:53,671 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:53,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:29:53,671 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1762476046, now seen corresponding path program 5 times [2020-10-14 23:29:53,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:53,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618631618] [2020-10-14 23:29:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:53,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:53,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:54,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:54,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:29:54,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:54,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-14 23:29:54,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:54,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:54,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:29:54,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:54,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:29:54,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:54,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:54,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:54,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:54,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:54,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:54,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:54,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:54,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:54,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-14 23:29:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:54,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:54,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:54,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:54,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:54,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:54,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:54,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:54,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:29:54,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618631618] [2020-10-14 23:29:54,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:54,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:29:54,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639230405] [2020-10-14 23:29:54,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:29:54,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:54,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:29:54,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:29:54,207 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-10-14 23:29:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:54,403 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-14 23:29:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:29:54,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 23:29:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:54,404 INFO L225 Difference]: With dead ends: 40 [2020-10-14 23:29:54,405 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 23:29:54,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:29:54,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 23:29:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-14 23:29:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 23:29:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-14 23:29:54,410 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2020-10-14 23:29:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:54,411 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-14 23:29:54,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:29:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-14 23:29:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:29:54,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:54,412 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:54,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:29:54,412 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1382925075, now seen corresponding path program 6 times [2020-10-14 23:29:54,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:54,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099079102] [2020-10-14 23:29:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:54,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:54,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:54,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:54,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:29:54,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:54,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-14 23:29:54,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:54,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:54,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:29:54,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:54,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:29:54,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:54,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:54,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:54,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:54,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:54,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:54,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:54,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:55,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:55,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 23:29:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:55,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:55,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:55,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:55,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:55,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:29:55,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:55,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:55,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:55,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:55,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:55,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:29:55,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099079102] [2020-10-14 23:29:55,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:55,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:29:55,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496713578] [2020-10-14 23:29:55,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:29:55,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:55,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:29:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:29:55,016 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-14 23:29:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:55,217 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-10-14 23:29:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:29:55,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 23:29:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:55,218 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:29:55,219 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:29:55,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:29:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:29:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-14 23:29:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:29:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-14 23:29:55,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2020-10-14 23:29:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:55,225 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-14 23:29:55,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:29:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-14 23:29:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:29:55,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:55,226 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:55,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:29:55,226 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:55,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1706662104, now seen corresponding path program 7 times [2020-10-14 23:29:55,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:55,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169465815] [2020-10-14 23:29:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:55,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:55,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:55,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:55,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:29:55,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:55,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-14 23:29:55,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:55,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:29:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:29:55,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:55,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:55,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:55,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:55,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:55,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:55,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:55,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:55,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:55,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:55,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:55,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:55,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:55,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 23:29:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:55,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:55,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:55,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:55,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:55,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:29:55,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:55,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:55,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:55,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:55,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:55,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:29:55,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169465815] [2020-10-14 23:29:55,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:55,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:29:55,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945848766] [2020-10-14 23:29:55,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:29:55,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:55,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:29:55,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:29:55,900 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-10-14 23:29:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:56,218 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-10-14 23:29:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:29:56,218 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 23:29:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:56,219 INFO L225 Difference]: With dead ends: 44 [2020-10-14 23:29:56,220 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:29:56,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:29:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:29:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-14 23:29:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:29:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-14 23:29:56,226 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2020-10-14 23:29:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:56,227 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-14 23:29:56,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:29:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-14 23:29:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:29:56,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:56,228 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:56,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:29:56,229 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash 714665635, now seen corresponding path program 8 times [2020-10-14 23:29:56,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:56,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846018363] [2020-10-14 23:29:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:56,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:56,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:56,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:56,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:29:56,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:56,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-14 23:29:56,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:56,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:29:56,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:56,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:29:56,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:57,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:57,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:57,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:57,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:57,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:57,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:29:57,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:57,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:57,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:57,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:57,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:57,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:57,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 23:29:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:57,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:57,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:57,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:57,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:57,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:57,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:57,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:29:57,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846018363] [2020-10-14 23:29:57,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:57,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:29:57,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329148713] [2020-10-14 23:29:57,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:29:57,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:57,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:29:57,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:29:57,170 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-10-14 23:29:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:57,443 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-14 23:29:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:29:57,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 23:29:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:57,446 INFO L225 Difference]: With dead ends: 46 [2020-10-14 23:29:57,446 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:29:57,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:29:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:29:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-14 23:29:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:29:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-14 23:29:57,455 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2020-10-14 23:29:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:57,455 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-14 23:29:57,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:29:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-14 23:29:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:29:57,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:57,458 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:57,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:29:57,458 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:57,459 INFO L82 PathProgramCache]: Analyzing trace with hash -261651618, now seen corresponding path program 9 times [2020-10-14 23:29:57,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:57,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958581188] [2020-10-14 23:29:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:57,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:57,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:58,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:58,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:29:58,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:29:58,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-14 23:29:58,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:58,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:58,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:29:58,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:29:58,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:29:58,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:58,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:58,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:58,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:58,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:58,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:58,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:29:58,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:58,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:58,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:58,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:58,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:58,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:58,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 23:29:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:58,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:58,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:58,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:58,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:58,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:58,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:58,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:58,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:29:58,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958581188] [2020-10-14 23:29:58,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:58,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:29:58,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769368191] [2020-10-14 23:29:58,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:29:58,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:29:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:29:58,327 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2020-10-14 23:29:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:58,659 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-10-14 23:29:58,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:29:58,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-14 23:29:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:58,660 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:29:58,660 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 23:29:58,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:29:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 23:29:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-14 23:29:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 23:29:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-14 23:29:58,671 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-14 23:29:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:58,671 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-14 23:29:58,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:29:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-14 23:29:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:29:58,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:58,672 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:58,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:29:58,673 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2095306073, now seen corresponding path program 10 times [2020-10-14 23:29:58,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:58,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198422747] [2020-10-14 23:29:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:58,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:58,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:58,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:29:58,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:58,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-14 23:29:58,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:58,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:58,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:29:58,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:29:58,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:29:58,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:58,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:58,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:58,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:58,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:58,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:58,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:29:58,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:58,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:58,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:58,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:58,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:58,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:58,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-14 23:29:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:58,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:58,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:58,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:58,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:58,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:58,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:58,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:58,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:58,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:58,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:58,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:29:58,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198422747] [2020-10-14 23:29:58,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:29:58,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:29:58,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011210938] [2020-10-14 23:29:58,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:29:58,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:58,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:29:58,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:29:58,772 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 4 states. [2020-10-14 23:29:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:58,813 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-14 23:29:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:29:58,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-14 23:29:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:58,814 INFO L225 Difference]: With dead ends: 74 [2020-10-14 23:29:58,814 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:29:58,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:29:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:29:58,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 23:29:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:29:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-14 23:29:58,820 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-14 23:29:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:58,821 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-14 23:29:58,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:29:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-14 23:29:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:29:58,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:58,822 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:58,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:29:58,822 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash -900956101, now seen corresponding path program 1 times [2020-10-14 23:29:58,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:58,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815998525] [2020-10-14 23:29:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:58,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:58,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:58,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:29:58,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:58,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-14 23:29:58,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:58,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:58,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:29:58,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:29:58,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:29:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:58,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:58,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:58,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:58,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:58,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:58,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:29:58,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:58,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:58,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:58,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 23:29:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:58,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:58,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:58,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:58,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:58,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:58,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:58,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:29:58,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815998525] [2020-10-14 23:29:58,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:58,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:29:58,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889751900] [2020-10-14 23:29:58,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:29:58,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:29:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:29:58,982 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 5 states. [2020-10-14 23:29:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:59,051 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-14 23:29:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:29:59,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-10-14 23:29:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:59,052 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:29:59,052 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 23:29:59,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:29:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 23:29:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 23:29:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:29:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-14 23:29:59,058 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-14 23:29:59,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:59,058 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-14 23:29:59,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:29:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-14 23:29:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:29:59,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:59,059 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:59,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:29:59,060 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:59,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:59,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1614150301, now seen corresponding path program 2 times [2020-10-14 23:29:59,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:59,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257144639] [2020-10-14 23:29:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:59,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:59,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:59,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:29:59,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:59,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-14 23:29:59,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:59,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:59,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:29:59,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:29:59,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:29:59,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:59,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:59,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:59,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:59,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:59,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:59,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:59,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:59,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:59,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:59,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:59,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:59,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 23:29:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:59,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:59,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:59,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:59,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:59,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:59,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:59,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:59,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:29:59,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257144639] [2020-10-14 23:29:59,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:59,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:29:59,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519785901] [2020-10-14 23:29:59,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:29:59,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:59,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:29:59,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:29:59,250 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 6 states. [2020-10-14 23:29:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:59,307 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-14 23:29:59,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:29:59,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-14 23:29:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:59,308 INFO L225 Difference]: With dead ends: 78 [2020-10-14 23:29:59,308 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:29:59,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:29:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:29:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 23:29:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 23:29:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-14 23:29:59,313 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-14 23:29:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:59,314 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-14 23:29:59,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:29:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-14 23:29:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:29:59,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:59,315 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:59,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:29:59,315 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:59,316 INFO L82 PathProgramCache]: Analyzing trace with hash 564814975, now seen corresponding path program 3 times [2020-10-14 23:29:59,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:59,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033517384] [2020-10-14 23:29:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:59,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:59,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:59,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:29:59,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:59,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-14 23:29:59,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:59,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:59,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:29:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:29:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:29:59,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:59,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:29:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:59,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:59,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:59,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:59,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:59,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:59,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:59,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:29:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:59,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:29:59,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 23:29:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:59,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:59,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:59,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:29:59,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:59,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:29:59,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:59,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:59,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:29:59,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:29:59,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:29:59,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:29:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:29:59,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033517384] [2020-10-14 23:29:59,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:29:59,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:29:59,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140287450] [2020-10-14 23:29:59,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:29:59,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:29:59,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:29:59,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:29:59,605 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-10-14 23:29:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:29:59,684 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-14 23:29:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:29:59,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-14 23:29:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:29:59,685 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:29:59,685 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:29:59,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:29:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:29:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 23:29:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:29:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-14 23:29:59,691 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-14 23:29:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:29:59,691 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-14 23:29:59,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:29:59,691 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-14 23:29:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:29:59,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:29:59,692 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:29:59,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:29:59,692 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:29:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:29:59,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1470881249, now seen corresponding path program 4 times [2020-10-14 23:29:59,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:29:59,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023459267] [2020-10-14 23:29:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:29:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:29:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:29:59,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:29:59,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:29:59,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:29:59,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-14 23:29:59,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:29:59,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:29:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:29:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:29:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:29:59,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:00,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:00,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:00,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:00,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:00,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:00,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:00,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:00,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:00,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:00,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-14 23:30:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:00,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:00,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:00,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:00,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:00,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:00,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:00,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:00,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:00,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:30:00,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:00,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:30:00,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023459267] [2020-10-14 23:30:00,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:00,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:30:00,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772068704] [2020-10-14 23:30:00,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:30:00,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:00,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:30:00,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:30:00,041 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 8 states. [2020-10-14 23:30:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:00,110 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-14 23:30:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:30:00,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-14 23:30:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:00,112 INFO L225 Difference]: With dead ends: 82 [2020-10-14 23:30:00,112 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:30:00,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:30:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:30:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 23:30:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:30:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-14 23:30:00,118 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-14 23:30:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:00,118 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-14 23:30:00,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:30:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-14 23:30:00,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:30:00,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:00,119 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:00,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:30:00,119 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash 322209475, now seen corresponding path program 5 times [2020-10-14 23:30:00,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:00,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696732954] [2020-10-14 23:30:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:00,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:00,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:00,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:30:00,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:00,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-14 23:30:00,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:00,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:00,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:30:00,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:30:00,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:30:00,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:00,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:00,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:00,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:00,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:00,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:00,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:00,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:00,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:00,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:00,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:00,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:00,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:00,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 23:30:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:00,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:00,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:00,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:00,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:00,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:00,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:00,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:00,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:00,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:30:00,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:00,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:30:00,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696732954] [2020-10-14 23:30:00,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:00,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:30:00,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314531151] [2020-10-14 23:30:00,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:30:00,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:00,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:30:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:30:00,569 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 9 states. [2020-10-14 23:30:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:00,640 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-14 23:30:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:30:00,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-14 23:30:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:00,641 INFO L225 Difference]: With dead ends: 84 [2020-10-14 23:30:00,641 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:30:00,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:30:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:30:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 23:30:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:30:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-14 23:30:00,649 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-14 23:30:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:00,649 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-14 23:30:00,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:30:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-14 23:30:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:30:00,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:00,650 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:00,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:30:00,651 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:00,651 INFO L82 PathProgramCache]: Analyzing trace with hash 255229733, now seen corresponding path program 6 times [2020-10-14 23:30:00,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:00,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949994176] [2020-10-14 23:30:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:00,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:01,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:01,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:30:01,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:01,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-14 23:30:01,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:01,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:01,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:30:01,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:30:01,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:30:01,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:01,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:01,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:01,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:01,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:01,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:01,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:30:01,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:01,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:01,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:01,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:01,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:01,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:01,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 23:30:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:01,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:01,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:01,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:01,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:30:01,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:01,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:30:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:01,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:30:01,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949994176] [2020-10-14 23:30:01,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:01,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:30:01,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695988920] [2020-10-14 23:30:01,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:30:01,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:01,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:30:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:30:01,311 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 10 states. [2020-10-14 23:30:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:01,431 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-14 23:30:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:30:01,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-14 23:30:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:01,433 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:30:01,433 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:30:01,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:30:01,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:30:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 23:30:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:30:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-14 23:30:01,449 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-14 23:30:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:01,450 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-14 23:30:01,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:30:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-14 23:30:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:30:01,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:01,451 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:01,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:30:01,453 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:01,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:01,454 INFO L82 PathProgramCache]: Analyzing trace with hash 312207111, now seen corresponding path program 7 times [2020-10-14 23:30:01,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:01,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821728952] [2020-10-14 23:30:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:01,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:02,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:02,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:30:02,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:02,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-14 23:30:02,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:02,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:02,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:30:02,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:30:02,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:30:02,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:02,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:02,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:02,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:02,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:02,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:02,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:02,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:02,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:02,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:02,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:02,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:02,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:02,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-14 23:30:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:02,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:02,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:02,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:02,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:02,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:30:02,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:02,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:30:02,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:02,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:30:02,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821728952] [2020-10-14 23:30:02,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:02,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:30:02,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196827945] [2020-10-14 23:30:02,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:30:02,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:02,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:30:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:30:02,173 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 11 states. [2020-10-14 23:30:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:02,284 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-14 23:30:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:30:02,285 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-14 23:30:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:02,286 INFO L225 Difference]: With dead ends: 88 [2020-10-14 23:30:02,286 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:30:02,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:30:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:30:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 23:30:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:30:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-14 23:30:02,299 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-14 23:30:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:02,301 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-14 23:30:02,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:30:02,301 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-14 23:30:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:30:02,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:02,302 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:02,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:30:02,303 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:02,303 INFO L82 PathProgramCache]: Analyzing trace with hash -767107479, now seen corresponding path program 8 times [2020-10-14 23:30:02,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:02,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428486270] [2020-10-14 23:30:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:02,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:02,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:02,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:30:02,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:02,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-14 23:30:02,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:02,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:02,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:30:02,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:30:02,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:30:02,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:03,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:03,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:03,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:03,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:03,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:03,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:03,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:03,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:03,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:03,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 23:30:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:03,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:03,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:03,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:03,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:03,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:03,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:03,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:03,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:03,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:30:03,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:03,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:30:03,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428486270] [2020-10-14 23:30:03,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:03,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:30:03,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762666838] [2020-10-14 23:30:03,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:30:03,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:03,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:30:03,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:30:03,075 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 12 states. [2020-10-14 23:30:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:03,158 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-14 23:30:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:30:03,158 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-14 23:30:03,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:03,159 INFO L225 Difference]: With dead ends: 90 [2020-10-14 23:30:03,159 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 23:30:03,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:30:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 23:30:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-14 23:30:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 23:30:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-14 23:30:03,165 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-14 23:30:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:03,166 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-14 23:30:03,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:30:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-14 23:30:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:30:03,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:03,169 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:03,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:30:03,169 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:03,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1393657163, now seen corresponding path program 9 times [2020-10-14 23:30:03,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:03,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417366483] [2020-10-14 23:30:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:03,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:04,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:04,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:30:04,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:04,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 896 [2020-10-14 23:30:04,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:04,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:30:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:30:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:30:04,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:04,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:04,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:04,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:04,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:04,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:04,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:04,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:04,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:04,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:04,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:04,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:04,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:04,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 23:30:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:04,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:04,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:04,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:04,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:04,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:04,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:04,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:04,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:04,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:30:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:04,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 23:30:04,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417366483] [2020-10-14 23:30:04,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:04,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:30:04,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552564778] [2020-10-14 23:30:04,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:30:04,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:04,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:30:04,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:30:04,210 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 13 states. [2020-10-14 23:30:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:04,316 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-14 23:30:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:30:04,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-14 23:30:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:04,317 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:30:04,317 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:30:04,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:30:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:30:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 23:30:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:30:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-14 23:30:04,326 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-14 23:30:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:04,327 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-14 23:30:04,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:30:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-14 23:30:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:30:04,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:04,329 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:04,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:30:04,330 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:04,330 INFO L82 PathProgramCache]: Analyzing trace with hash -875693139, now seen corresponding path program 10 times [2020-10-14 23:30:04,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:04,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004212436] [2020-10-14 23:30:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 23:30:04,385 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 23:30:04,385 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 23:30:04,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:30:04,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:30:04 BoogieIcfgContainer [2020-10-14 23:30:04,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:30:04,450 INFO L168 Benchmark]: Toolchain (without parser) took 15595.40 ms. Allocated memory was 145.2 MB in the beginning and 408.4 MB in the end (delta: 263.2 MB). Free memory was 101.8 MB in the beginning and 87.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 277.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:30:04,451 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 23:30:04,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.27 ms. Allocated memory is still 145.2 MB. Free memory was 101.4 MB in the beginning and 91.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-10-14 23:30:04,454 INFO L168 Benchmark]: Boogie Preprocessor took 126.73 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 91.1 MB in the beginning and 178.9 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-14 23:30:04,455 INFO L168 Benchmark]: RCFGBuilder took 387.40 ms. Allocated memory is still 201.9 MB. Free memory was 178.9 MB in the beginning and 161.3 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:30:04,458 INFO L168 Benchmark]: TraceAbstraction took 14777.56 ms. Allocated memory was 201.9 MB in the beginning and 408.4 MB in the end (delta: 206.6 MB). Free memory was 160.3 MB in the beginning and 87.5 MB in the end (delta: 72.8 MB). Peak memory consumption was 279.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:30:04,463 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.27 ms. Allocated memory is still 145.2 MB. Free memory was 101.4 MB in the beginning and 91.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.73 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 91.1 MB in the beginning and 178.9 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.40 ms. Allocated memory is still 201.9 MB. Free memory was 178.9 MB in the beginning and 161.3 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14777.56 ms. Allocated memory was 201.9 MB in the beginning and 408.4 MB in the end (delta: 206.6 MB). Free memory was 160.3 MB in the beginning and 87.5 MB in the end (delta: 72.8 MB). Peak memory consumption was 279.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] struct cont cont; [L20] struct dummy array[10]; [L21] int i, *pa; [L22] i = __VERIFIER_nondet_int() [L24] int j = 0; [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND FALSE !(j < 10) [L29] COND TRUE i >= 0 && i < 9 [L30] cont.array = &array[i] [L31] EXPR cont.array [L31] pa = &cont.array[0].b [L32] EXPR cont.array [L32] EXPR cont.array[0].b [L32] COND TRUE cont.array[0].b > 0 [L33] EXPR array[i].b [L33] i = array[i].b - 10 [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND FALSE !(i < *pa) [L37] CALL, EXPR check(&cont, i) [L14] EXPR pc->array [L14] EXPR pc->array[1].b [L14] return pc->array[1].b == i; [L37] RET, EXPR check(&cont, i) [L37] COND TRUE !check(&cont, i) [L45] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.6s, OverallIterations: 22, TraceHistogramMax: 11, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 356 SDtfs, 152 SDslu, 1452 SDs, 0 SdLazy, 1304 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 73332 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 1100/1715 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...