/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:37:29,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:37:29,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:37:29,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:37:29,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:37:29,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:37:29,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:37:29,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:37:29,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:37:29,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:37:29,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:37:29,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:37:29,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:37:29,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:37:29,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:37:29,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:37:29,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:37:29,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:37:29,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:37:29,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:37:29,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:37:29,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:37:29,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:37:29,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:37:29,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:37:29,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:37:29,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:37:29,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:37:29,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:37:29,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:37:29,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:37:29,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:37:29,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:37:29,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:37:29,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:37:29,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:37:29,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:37:29,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:37:29,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:37:29,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:37:29,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:37:29,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:37:29,727 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:37:29,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:37:29,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:37:29,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:37:29,729 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:37:29,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:37:29,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:37:29,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:37:29,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:37:29,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:37:29,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:37:29,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:37:29,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:37:29,731 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:37:29,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:37:29,732 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:37:29,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:37:29,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:37:29,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:37:29,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:37:29,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:37:29,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:37:29,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:37:29,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:37:29,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:37:29,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:37:29,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:37:29,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:37:29,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:37:29,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:37:30,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:37:30,229 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:37:30,236 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:37:30,238 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:37:30,238 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:37:30,239 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2020-09-24 21:37:30,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bd4977f8/2c9808c9210f4764a730d84300d635a3/FLAG0a1f3ad92 [2020-09-24 21:37:30,825 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:37:30,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-1.c [2020-09-24 21:37:30,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bd4977f8/2c9808c9210f4764a730d84300d635a3/FLAG0a1f3ad92 [2020-09-24 21:37:31,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bd4977f8/2c9808c9210f4764a730d84300d635a3 [2020-09-24 21:37:31,193 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:37:31,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:37:31,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:37:31,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:37:31,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:37:31,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:37:31" (1/1) ... [2020-09-24 21:37:31,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fbfd6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31, skipping insertion in model container [2020-09-24 21:37:31,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:37:31" (1/1) ... [2020-09-24 21:37:31,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:37:31,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:37:31,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:37:31,479 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:37:31,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:37:31,517 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:37:31,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31 WrapperNode [2020-09-24 21:37:31,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:37:31,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:37:31,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:37:31,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:37:31,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31" (1/1) ... [2020-09-24 21:37:31,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31" (1/1) ... [2020-09-24 21:37:31,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31" (1/1) ... [2020-09-24 21:37:31,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31" (1/1) ... [2020-09-24 21:37:31,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31" (1/1) ... [2020-09-24 21:37:31,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31" (1/1) ... [2020-09-24 21:37:31,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31" (1/1) ... [2020-09-24 21:37:31,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:37:31,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:37:31,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:37:31,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:37:31,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:37:31,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:37:31,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:37:31,727 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 21:37:31,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:37:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:37:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:37:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 21:37:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:37:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:37:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:37:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:37:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:37:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:37:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:37:32,020 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:37:32,021 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:37:32,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:37:32 BoogieIcfgContainer [2020-09-24 21:37:32,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:37:32,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:37:32,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:37:32,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:37:32,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:37:31" (1/3) ... [2020-09-24 21:37:32,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff6a85f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:37:32, skipping insertion in model container [2020-09-24 21:37:32,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:31" (2/3) ... [2020-09-24 21:37:32,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff6a85f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:37:32, skipping insertion in model container [2020-09-24 21:37:32,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:37:32" (3/3) ... [2020-09-24 21:37:32,035 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-1.c [2020-09-24 21:37:32,047 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:37:32,057 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:37:32,078 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:37:32,104 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:37:32,105 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:37:32,105 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:37:32,105 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:37:32,105 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:37:32,105 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:37:32,105 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:37:32,106 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:37:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-09-24 21:37:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 21:37:32,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:32,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:32,135 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:32,142 INFO L82 PathProgramCache]: Analyzing trace with hash 606292035, now seen corresponding path program 1 times [2020-09-24 21:37:32,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:32,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049576146] [2020-09-24 21:37:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:32,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:32,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:32,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 21:37:32,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:32,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-09-24 21:37:32,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:32,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:32,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 21:37:32,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:32,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:37:32,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:32,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:32,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:32,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:32,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:32,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:37:32,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:32,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:32,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:32,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:32,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:32,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 21:37:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:32,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:32,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:32,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:32,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:32,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 21:37:32,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:32,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:32,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:32,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:32,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:32,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049576146] [2020-09-24 21:37:32,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:37:32,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:37:32,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184877965] [2020-09-24 21:37:32,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:37:32,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:37:32,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:37:32,656 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-09-24 21:37:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:32,779 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-09-24 21:37:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:37:32,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-09-24 21:37:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:32,795 INFO L225 Difference]: With dead ends: 73 [2020-09-24 21:37:32,795 INFO L226 Difference]: Without dead ends: 41 [2020-09-24 21:37:32,799 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 [2020-09-24 21:37:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-24 21:37:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-09-24 21:37:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 21:37:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-09-24 21:37:32,848 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 34 [2020-09-24 21:37:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:32,848 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-09-24 21:37:32,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:37:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-09-24 21:37:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:37:32,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:32,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:32,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:37:32,851 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1986388344, now seen corresponding path program 1 times [2020-09-24 21:37:32,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:32,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116922088] [2020-09-24 21:37:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:32,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:33,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:33,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 21:37:33,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:33,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-09-24 21:37:33,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:33,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:37:33,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:37:33,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:37:33,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:33,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:33,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:33,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:33,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:33,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:33,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 21:37:33,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:33,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:37:33,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:37:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:33,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:33,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:33,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:33,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:33,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 21:37:33,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:33,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:33,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:33,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116922088] [2020-09-24 21:37:33,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:37:33,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 21:37:33,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644218753] [2020-09-24 21:37:33,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:37:33,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:37:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:37:33,573 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 8 states. [2020-09-24 21:37:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:33,877 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-09-24 21:37:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:37:33,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-09-24 21:37:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:33,880 INFO L225 Difference]: With dead ends: 60 [2020-09-24 21:37:33,880 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 21:37:33,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:37:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 21:37:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-09-24 21:37:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 21:37:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-09-24 21:37:33,890 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 36 [2020-09-24 21:37:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:33,891 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-09-24 21:37:33,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:37:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-09-24 21:37:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 21:37:33,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:33,893 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:33,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:37:33,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:33,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1471095088, now seen corresponding path program 1 times [2020-09-24 21:37:33,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:33,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096281412] [2020-09-24 21:37:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:33,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:35,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 21:37:35,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:35,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1234 [2020-09-24 21:37:35,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:37:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:37:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:37:35,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:35,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:35,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:35,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:35,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:37:35,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:35,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:35,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:35,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:35,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:35,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:37:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:35,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:35,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:35,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:37:35,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:35,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:35,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:35,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096281412] [2020-09-24 21:37:35,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:35,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:37:35,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358160227] [2020-09-24 21:37:35,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:37:35,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:37:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:37:35,308 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 9 states. [2020-09-24 21:37:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:35,563 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-09-24 21:37:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:37:35,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-09-24 21:37:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:35,565 INFO L225 Difference]: With dead ends: 66 [2020-09-24 21:37:35,566 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 21:37:35,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:37:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 21:37:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-09-24 21:37:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 21:37:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-09-24 21:37:35,574 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 42 [2020-09-24 21:37:35,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:35,575 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-09-24 21:37:35,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:37:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-09-24 21:37:35,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 21:37:35,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:35,577 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:35,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:37:35,577 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:35,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash -93423064, now seen corresponding path program 2 times [2020-09-24 21:37:35,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:35,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116581755] [2020-09-24 21:37:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:37,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 21:37:37,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:37,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1738 [2020-09-24 21:37:37,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:37,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:37:37,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:37:37,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:37:37,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:37,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:37,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:37,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:37,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:37,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:37,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:37,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:37,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:37,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:37,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:37:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:37,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:37,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:37,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:37,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:37:37,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:37,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:37,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116581755] [2020-09-24 21:37:37,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:37,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:37:37,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161108422] [2020-09-24 21:37:37,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:37:37,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:37,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:37:37,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:37:37,481 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 10 states. [2020-09-24 21:37:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:37,760 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-09-24 21:37:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:37:37,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-09-24 21:37:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:37,762 INFO L225 Difference]: With dead ends: 72 [2020-09-24 21:37:37,763 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 21:37:37,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:37:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 21:37:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-09-24 21:37:37,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 21:37:37,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-09-24 21:37:37,775 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 48 [2020-09-24 21:37:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:37,776 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-09-24 21:37:37,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:37:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-09-24 21:37:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 21:37:37,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:37,780 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:37,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:37:37,781 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:37,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:37,781 INFO L82 PathProgramCache]: Analyzing trace with hash 399520640, now seen corresponding path program 3 times [2020-09-24 21:37:37,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:37,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125077433] [2020-09-24 21:37:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:37,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:38,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:40,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:40,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 21:37:40,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:40,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2948 [2020-09-24 21:37:40,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:37:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:37:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:37:40,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:40,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:40,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:40,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:40,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:40,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:40,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:40,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:40,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:40,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:40,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:40,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:40,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 21:37:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:40,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:40,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:40,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:40,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:40,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:37:40,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:40,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:40,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:40,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:40,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:40,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125077433] [2020-09-24 21:37:40,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:40,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:37:40,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843836287] [2020-09-24 21:37:40,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:37:40,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:40,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:37:40,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:37:40,947 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 11 states. [2020-09-24 21:37:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:41,366 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-09-24 21:37:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:37:41,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-09-24 21:37:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:41,368 INFO L225 Difference]: With dead ends: 78 [2020-09-24 21:37:41,368 INFO L226 Difference]: Without dead ends: 64 [2020-09-24 21:37:41,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:37:41,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-24 21:37:41,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-09-24 21:37:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-24 21:37:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-09-24 21:37:41,378 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 54 [2020-09-24 21:37:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:41,378 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-09-24 21:37:41,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:37:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-09-24 21:37:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 21:37:41,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:41,380 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:41,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:37:41,381 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2020051672, now seen corresponding path program 4 times [2020-09-24 21:37:41,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:41,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136941981] [2020-09-24 21:37:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:41,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:41,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:44,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:44,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:37:44,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:44,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3502 [2020-09-24 21:37:44,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:44,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:37:44,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:37:44,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:37:44,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:37:45,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:45,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:45,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:45,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:45,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:45,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:45,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:45,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 21:37:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:45,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:45,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:45,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:45,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:45,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:45,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:45,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:45,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136941981] [2020-09-24 21:37:45,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:45,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:37:45,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894948244] [2020-09-24 21:37:45,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:37:45,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:45,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:37:45,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:37:45,120 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 12 states. [2020-09-24 21:37:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:45,529 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-09-24 21:37:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 21:37:45,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-09-24 21:37:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:45,531 INFO L225 Difference]: With dead ends: 84 [2020-09-24 21:37:45,531 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 21:37:45,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-09-24 21:37:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 21:37:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-09-24 21:37:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 21:37:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-24 21:37:45,540 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 60 [2020-09-24 21:37:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:45,540 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-24 21:37:45,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:37:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-24 21:37:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 21:37:45,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:45,542 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:45,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:37:45,542 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:45,543 INFO L82 PathProgramCache]: Analyzing trace with hash 956694576, now seen corresponding path program 5 times [2020-09-24 21:37:45,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:45,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428034139] [2020-09-24 21:37:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:45,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:45,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:48,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:48,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 21:37:48,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:48,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3367 [2020-09-24 21:37:48,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 21:37:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:37:48,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:37:48,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:49,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:49,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:49,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:49,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:49,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:49,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:49,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:49,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:49,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:49,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-24 21:37:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:49,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:49,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:49,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:49,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:49,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:49,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:49,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:49,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:49,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:49,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:49,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428034139] [2020-09-24 21:37:49,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:49,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:37:49,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171390378] [2020-09-24 21:37:49,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:37:49,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:37:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:37:49,186 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 13 states. [2020-09-24 21:37:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:49,830 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-09-24 21:37:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:37:49,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-09-24 21:37:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:49,832 INFO L225 Difference]: With dead ends: 90 [2020-09-24 21:37:49,832 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 21:37:49,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:37:49,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 21:37:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-09-24 21:37:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 21:37:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-09-24 21:37:49,840 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 66 [2020-09-24 21:37:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:49,841 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-09-24 21:37:49,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:37:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-09-24 21:37:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 21:37:49,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:49,842 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:49,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:37:49,843 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:49,843 INFO L82 PathProgramCache]: Analyzing trace with hash -212003960, now seen corresponding path program 6 times [2020-09-24 21:37:49,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:49,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158623360] [2020-09-24 21:37:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:49,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:50,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:52,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:52,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 21:37:52,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:52,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2540 [2020-09-24 21:37:52,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:52,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:37:52,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:37:52,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 21:37:52,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:52,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:52,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:52,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:52,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:52,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:52,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:52,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:52,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:52,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:52,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 21:37:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:52,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:52,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:52,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:52,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:52,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:37:52,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:52,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:52,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:52,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:52,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:52,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158623360] [2020-09-24 21:37:52,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:52,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:37:52,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284191183] [2020-09-24 21:37:52,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:37:52,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:52,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:37:52,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:37:52,679 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 14 states. [2020-09-24 21:37:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:53,268 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-09-24 21:37:53,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:37:53,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2020-09-24 21:37:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:53,271 INFO L225 Difference]: With dead ends: 96 [2020-09-24 21:37:53,271 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 21:37:53,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:37:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 21:37:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-09-24 21:37:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 21:37:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-09-24 21:37:53,285 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 72 [2020-09-24 21:37:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:53,287 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-09-24 21:37:53,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:37:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-09-24 21:37:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 21:37:53,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:53,291 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:53,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:37:53,292 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:53,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1778498336, now seen corresponding path program 7 times [2020-09-24 21:37:53,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:53,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338537698] [2020-09-24 21:37:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:53,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:53,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:56,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:56,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 21:37:56,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:56,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3287 [2020-09-24 21:37:56,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:56,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:37:56,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:37:56,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 21:37:56,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:37:56,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:56,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:56,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:56,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:56,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:56,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:56,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:56,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:56,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 21:37:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:56,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:56,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:56,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:56,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:37:56,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:56,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:56,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338537698] [2020-09-24 21:37:56,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:56,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:37:56,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000102073] [2020-09-24 21:37:56,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:37:56,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:56,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:37:56,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:37:56,874 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 15 states. [2020-09-24 21:37:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:57,405 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-09-24 21:37:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:37:57,405 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-09-24 21:37:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:57,406 INFO L225 Difference]: With dead ends: 102 [2020-09-24 21:37:57,407 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 21:37:57,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:37:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 21:37:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2020-09-24 21:37:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 21:37:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-09-24 21:37:57,414 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 78 [2020-09-24 21:37:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:57,414 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-09-24 21:37:57,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:37:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-09-24 21:37:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 21:37:57,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:57,416 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:57,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:37:57,416 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1012601912, now seen corresponding path program 8 times [2020-09-24 21:37:57,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:57,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081946594] [2020-09-24 21:37:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:57,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:57,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:02,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:02,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-24 21:38:02,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:02,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 21:38:02,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:02,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:38:02,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:38:02,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 21:38:02,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:02,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:02,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:02,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:02,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:38:02,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:02,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:02,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-24 21:38:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:02,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:02,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:38:02,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:02,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:38:02,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:02,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:38:02,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:02,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:02,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081946594] [2020-09-24 21:38:02,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:02,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:38:02,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446580880] [2020-09-24 21:38:02,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:38:02,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:38:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:38:02,702 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 16 states. [2020-09-24 21:38:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:03,259 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-09-24 21:38:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:38:03,260 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84 [2020-09-24 21:38:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:03,261 INFO L225 Difference]: With dead ends: 108 [2020-09-24 21:38:03,261 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 21:38:03,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=965, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 21:38:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 21:38:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-09-24 21:38:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-24 21:38:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-09-24 21:38:03,277 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 84 [2020-09-24 21:38:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:03,278 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-09-24 21:38:03,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:38:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-09-24 21:38:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 21:38:03,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:03,279 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:03,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:38:03,280 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash 113574288, now seen corresponding path program 9 times [2020-09-24 21:38:03,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:03,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240013891] [2020-09-24 21:38:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:03,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:07,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:07,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 21:38:07,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:07,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4360 [2020-09-24 21:38:07,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:07,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:38:07,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:38:07,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 21:38:07,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:07,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:07,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:07,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:07,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:07,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:07,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:38:07,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:07,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:07,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:07,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:07,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:07,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 21:38:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:07,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:07,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:07,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:38:07,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:07,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:38:07,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:07,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:38:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:07,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:07,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240013891] [2020-09-24 21:38:07,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:07,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:38:07,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428885525] [2020-09-24 21:38:07,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:38:07,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:07,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:38:07,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:38:07,963 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 17 states. [2020-09-24 21:38:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:08,695 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-09-24 21:38:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 21:38:08,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2020-09-24 21:38:08,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:08,696 INFO L225 Difference]: With dead ends: 114 [2020-09-24 21:38:08,696 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 21:38:08,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1191, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:38:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 21:38:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-09-24 21:38:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-24 21:38:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-09-24 21:38:08,712 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 90 [2020-09-24 21:38:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:08,712 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-09-24 21:38:08,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:38:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-09-24 21:38:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 21:38:08,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:08,715 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:08,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:38:08,716 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:08,716 INFO L82 PathProgramCache]: Analyzing trace with hash -227701528, now seen corresponding path program 10 times [2020-09-24 21:38:08,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:08,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510903322] [2020-09-24 21:38:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:08,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:08,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:13,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:13,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 21:38:13,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:13,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4375 [2020-09-24 21:38:13,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:13,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 21:38:13,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:38:13,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-09-24 21:38:13,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:13,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:13,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:13,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:13,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:13,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:13,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:38:13,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:13,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:13,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:13,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:13,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 21:38:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:13,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:13,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:13,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:38:13,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:13,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 21:38:13,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:13,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:38:13,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:13,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:38:13,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:13,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510903322] [2020-09-24 21:38:13,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:13,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 21:38:13,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437960439] [2020-09-24 21:38:13,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 21:38:13,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:13,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 21:38:13,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:38:13,833 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 22 states. [2020-09-24 21:38:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:15,418 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2020-09-24 21:38:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:38:15,419 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-09-24 21:38:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:15,421 INFO L225 Difference]: With dead ends: 113 [2020-09-24 21:38:15,421 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 21:38:15,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=1495, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:38:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 21:38:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-09-24 21:38:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 21:38:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-09-24 21:38:15,432 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 96 [2020-09-24 21:38:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:15,433 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-09-24 21:38:15,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 21:38:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-09-24 21:38:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-24 21:38:15,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:15,434 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:15,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:38:15,434 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1318701504, now seen corresponding path program 11 times [2020-09-24 21:38:15,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:15,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598818213] [2020-09-24 21:38:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:15,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:15,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking...