/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:44:45,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:44:45,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:44:45,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:44:45,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:44:45,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:44:45,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:44:45,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:44:45,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:44:45,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:44:45,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:44:45,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:44:45,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:44:45,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:44:45,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:44:45,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:44:45,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:44:45,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:44:45,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:44:45,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:44:45,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:44:45,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:44:45,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:44:45,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:44:45,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:44:45,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:44:45,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:44:45,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:44:45,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:44:45,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:44:45,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:44:45,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:44:45,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:44:45,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:44:45,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:44:45,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:44:45,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:44:45,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:44:45,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:44:45,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:44:45,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:44:45,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:44:45,718 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:44:45,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:44:45,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:44:45,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:44:45,720 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:44:45,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:44:45,721 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:44:45,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:44:45,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:44:45,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:44:45,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:44:45,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:44:45,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:44:45,723 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:44:45,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:44:45,724 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:44:45,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:44:45,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:44:45,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:44:45,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:44:45,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:44:45,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:44:45,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:44:45,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:44:45,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:44:45,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:44:45,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:44:45,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:44:45,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:44:45,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:44:45,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:44:46,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:44:46,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:44:46,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:44:46,014 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:44:46,015 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2020-10-13 10:44:46,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa0d31444/23276bef339349d18308138dc50edb57/FLAG4596ce9cd [2020-10-13 10:44:46,481 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:44:46,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2020-10-13 10:44:46,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa0d31444/23276bef339349d18308138dc50edb57/FLAG4596ce9cd [2020-10-13 10:44:46,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa0d31444/23276bef339349d18308138dc50edb57 [2020-10-13 10:44:46,927 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:44:46,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:44:46,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:44:46,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:44:46,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:44:46,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:44:46" (1/1) ... [2020-10-13 10:44:46,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dadf5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:46, skipping insertion in model container [2020-10-13 10:44:46,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:44:46" (1/1) ... [2020-10-13 10:44:46,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:44:46,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:44:47,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:44:47,124 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:44:47,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:44:47,146 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:44:47,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47 WrapperNode [2020-10-13 10:44:47,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:44:47,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:44:47,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:44:47,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:44:47,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47" (1/1) ... [2020-10-13 10:44:47,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47" (1/1) ... [2020-10-13 10:44:47,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47" (1/1) ... [2020-10-13 10:44:47,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47" (1/1) ... [2020-10-13 10:44:47,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47" (1/1) ... [2020-10-13 10:44:47,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47" (1/1) ... [2020-10-13 10:44:47,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47" (1/1) ... [2020-10-13 10:44:47,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:44:47,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:44:47,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:44:47,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:44:47,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:44:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:44:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:44:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:44:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:44:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:44:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:44:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:44:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:44:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:44:47,497 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:44:47,498 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:44:47,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:44:47 BoogieIcfgContainer [2020-10-13 10:44:47,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:44:47,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:44:47,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:44:47,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:44:47,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:44:46" (1/3) ... [2020-10-13 10:44:47,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556d30f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:44:47, skipping insertion in model container [2020-10-13 10:44:47,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:47" (2/3) ... [2020-10-13 10:44:47,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556d30f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:44:47, skipping insertion in model container [2020-10-13 10:44:47,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:44:47" (3/3) ... [2020-10-13 10:44:47,509 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_1-1.c [2020-10-13 10:44:47,519 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:44:47,526 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:44:47,539 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:44:47,560 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:44:47,560 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:44:47,560 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:44:47,560 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:44:47,561 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:44:47,561 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:44:47,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:44:47,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:44:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-13 10:44:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:44:47,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:47,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:47,582 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:47,586 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-13 10:44:47,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:47,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633291232] [2020-10-13 10:44:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:47,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:47,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:47,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:47,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:44:47,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:47,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-13 10:44:47,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:47,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:47,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:47,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:47,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:44:47,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:47,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:47,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:47,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:47,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:47,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:44:47,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:47,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:47,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:47,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:47,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:47,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633291232] [2020-10-13 10:44:47,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:44:47,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:44:47,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090556202] [2020-10-13 10:44:47,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:44:47,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:47,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:44:47,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:44:47,959 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-13 10:44:47,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:47,988 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-13 10:44:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:44:47,990 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 10:44:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:47,999 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:44:47,999 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:44:48,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:44:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:44:48,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:44:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:44:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-13 10:44:48,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-13 10:44:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:48,046 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-13 10:44:48,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:44:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-13 10:44:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:44:48,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:48,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:48,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:44:48,048 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2020-10-13 10:44:48,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:48,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571528419] [2020-10-13 10:44:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:48,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:48,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:44:48,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:48,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-13 10:44:48,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:48,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:44:48,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:48,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:44:48,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:44:48,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:48,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:48,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:48,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:48,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:44:48,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:48,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:48,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:44:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:48,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571528419] [2020-10-13 10:44:48,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:44:48,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:44:48,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373897154] [2020-10-13 10:44:48,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:44:48,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:48,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:44:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:48,288 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-13 10:44:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:48,312 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-13 10:44:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:44:48,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:44:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:48,314 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:44:48,315 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:44:48,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:44:48,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:44:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:44:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 10:44:48,322 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 10:44:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:48,322 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 10:44:48,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:44:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 10:44:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:44:48,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:48,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:48,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:44:48,324 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:48,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-13 10:44:48,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:48,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861291403] [2020-10-13 10:44:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:48,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:48,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:44:48,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:48,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 10:44:48,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:48,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:44:48,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:44:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:44:48,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:48,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:48,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:48,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:48,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:48,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:48,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:48,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:48,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861291403] [2020-10-13 10:44:48,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:44:48,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:44:48,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546704102] [2020-10-13 10:44:48,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:44:48,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:48,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:44:48,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:48,440 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-13 10:44:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:48,461 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 10:44:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:44:48,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-13 10:44:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:48,462 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:44:48,463 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:44:48,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:44:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:44:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:44:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 10:44:48,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-13 10:44:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:48,468 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 10:44:48,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:44:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 10:44:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:44:48,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:48,470 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:48,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:44:48,470 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:48,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:48,471 INFO L82 PathProgramCache]: Analyzing trace with hash -109889104, now seen corresponding path program 1 times [2020-10-13 10:44:48,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:48,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682425233] [2020-10-13 10:44:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:48,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:48,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:44:48,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:48,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-13 10:44:48,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:48,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:44:48,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:44:48,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:44:48,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:48,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:48,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:48,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:48,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:48,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:48,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:48,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:48,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682425233] [2020-10-13 10:44:48,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:48,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:44:48,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589736922] [2020-10-13 10:44:48,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:44:48,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:48,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:44:48,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:44:48,736 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 10:44:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:48,804 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-13 10:44:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:44:48,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:44:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:48,807 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:44:48,808 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:44:48,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:44:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:44:48,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-13 10:44:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:44:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-13 10:44:48,814 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-13 10:44:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:48,815 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-13 10:44:48,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:44:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-13 10:44:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:44:48,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:48,816 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:48,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:44:48,816 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1391623509, now seen corresponding path program 2 times [2020-10-13 10:44:48,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:48,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936428719] [2020-10-13 10:44:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:48,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:49,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:49,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:44:49,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:49,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-13 10:44:49,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:49,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:44:49,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:49,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:44:49,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:49,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:49,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:49,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:49,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:49,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:49,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:49,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:49,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:49,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:49,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:49,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:44:49,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936428719] [2020-10-13 10:44:49,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:49,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:44:49,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868510838] [2020-10-13 10:44:49,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:44:49,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:49,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:44:49,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:44:49,111 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-13 10:44:49,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:49,133 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:44:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:44:49,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 10:44:49,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:49,134 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:44:49,135 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:44:49,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:44:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:44:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 10:44:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:44:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 10:44:49,141 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-13 10:44:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:49,141 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 10:44:49,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:44:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 10:44:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:44:49,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:49,142 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:49,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:44:49,143 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:49,143 INFO L82 PathProgramCache]: Analyzing trace with hash -89745752, now seen corresponding path program 3 times [2020-10-13 10:44:49,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:49,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963790819] [2020-10-13 10:44:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:49,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:49,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:49,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:49,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:49,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:44:49,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:49,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-13 10:44:49,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:49,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:44:49,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:44:49,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:44:49,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:51,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:51,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:51,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:51,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:51,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:51,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:51,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:51,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:44:51,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963790819] [2020-10-13 10:44:51,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:51,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:44:51,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712043798] [2020-10-13 10:44:51,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:44:51,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:51,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:44:51,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2020-10-13 10:44:51,677 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-13 10:44:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:52,670 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:44:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:44:52,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 10:44:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:52,671 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:44:52,671 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:44:52,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2020-10-13 10:44:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:44:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 10:44:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:44:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-13 10:44:52,678 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-10-13 10:44:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:52,679 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-13 10:44:52,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:44:52,679 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-13 10:44:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:44:52,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:52,680 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:52,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:44:52,681 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash 786268579, now seen corresponding path program 4 times [2020-10-13 10:44:52,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:52,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526865246] [2020-10-13 10:44:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:52,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:52,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:52,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:53,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:53,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:44:53,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:53,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-13 10:44:53,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:44:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:44:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:53,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:53,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:53,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:53,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:53,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:53,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:53,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:53,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:53,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:53,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:53,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:44:53,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526865246] [2020-10-13 10:44:53,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:53,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:44:53,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798713747] [2020-10-13 10:44:53,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:44:53,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:53,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:44:53,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:44:53,091 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-10-13 10:44:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:53,125 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-13 10:44:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:44:53,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 10:44:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:53,127 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:44:53,127 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:44:53,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:44:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:44:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 10:44:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:44:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 10:44:53,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2020-10-13 10:44:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:53,134 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 10:44:53,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:44:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 10:44:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:44:53,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:53,135 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:53,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:44:53,136 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 564285216, now seen corresponding path program 5 times [2020-10-13 10:44:53,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:53,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094726835] [2020-10-13 10:44:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:53,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:53,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:53,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:53,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:44:53,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:53,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-13 10:44:53,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:53,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:44:53,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:44:53,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:44:53,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:53,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:53,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:53,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:53,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:53,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:53,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:53,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:53,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:53,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:44:53,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094726835] [2020-10-13 10:44:53,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:53,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:44:53,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590855433] [2020-10-13 10:44:53,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:44:53,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:53,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:44:53,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:44:53,721 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-13 10:44:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:53,934 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-13 10:44:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:44:53,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 10:44:53,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:53,935 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:44:53,935 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:44:53,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:44:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:44:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-13 10:44:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:44:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-13 10:44:53,942 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-10-13 10:44:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:53,943 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-13 10:44:53,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:44:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-13 10:44:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:44:53,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:53,944 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:53,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:44:53,944 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2050163685, now seen corresponding path program 6 times [2020-10-13 10:44:53,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:53,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238792475] [2020-10-13 10:44:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:53,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:53,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:54,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:54,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:44:54,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:54,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-13 10:44:54,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:54,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:44:54,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:54,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:44:54,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:54,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:54,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:54,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:54,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:54,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:54,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:54,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:54,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:54,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:54,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:44:54,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238792475] [2020-10-13 10:44:54,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:54,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:44:54,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495968884] [2020-10-13 10:44:54,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:44:54,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:54,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:44:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:44:54,736 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-13 10:44:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:54,789 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-10-13 10:44:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:44:54,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 10:44:54,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:54,791 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:44:54,791 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:44:54,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:44:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:44:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:44:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:44:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 10:44:54,799 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 24 [2020-10-13 10:44:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:54,799 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 10:44:54,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:44:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 10:44:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:44:54,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:54,800 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:54,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:44:54,800 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:54,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:54,801 INFO L82 PathProgramCache]: Analyzing trace with hash -968572136, now seen corresponding path program 7 times [2020-10-13 10:44:54,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:54,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897008088] [2020-10-13 10:44:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:54,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:54,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:55,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:55,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:55,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:44:55,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:55,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-13 10:44:55,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:55,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:44:55,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:44:55,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:44:55,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:55,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:55,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:55,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:55,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:55,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:55,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:55,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:55,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:44:55,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897008088] [2020-10-13 10:44:55,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:55,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:44:55,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451238180] [2020-10-13 10:44:55,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:44:55,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:44:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:44:55,803 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-10-13 10:44:56,193 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-10-13 10:44:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:57,163 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-10-13 10:44:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:44:57,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 10:44:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:57,165 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:44:57,165 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:44:57,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:44:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:44:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-13 10:44:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:44:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 10:44:57,172 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 26 [2020-10-13 10:44:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:57,172 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 10:44:57,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:44:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 10:44:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:44:57,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:57,174 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:57,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:44:57,174 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:57,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:57,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1952296429, now seen corresponding path program 8 times [2020-10-13 10:44:57,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:57,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337260908] [2020-10-13 10:44:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:57,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:57,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:57,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:58,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:58,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:44:58,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:58,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-13 10:44:58,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:44:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:44:58,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:58,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:58,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:58,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:58,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:58,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:58,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:58,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:58,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:58,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:58,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:58,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:44:58,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337260908] [2020-10-13 10:44:58,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:58,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:44:58,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131115057] [2020-10-13 10:44:58,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:44:58,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:58,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:44:58,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:44:58,100 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2020-10-13 10:44:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:58,166 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-13 10:44:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:44:58,167 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 10:44:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:58,168 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:44:58,168 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:44:58,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:44:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:44:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:44:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:44:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 10:44:58,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 28 [2020-10-13 10:44:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:58,181 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 10:44:58,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:44:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 10:44:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:44:58,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:58,182 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:58,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:44:58,182 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:58,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1397468528, now seen corresponding path program 9 times [2020-10-13 10:44:58,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:58,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632537010] [2020-10-13 10:44:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:58,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:58,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:58,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:59,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:59,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:44:59,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:59,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-13 10:44:59,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:59,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:44:59,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:44:59,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:44:59,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:01,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:01,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:01,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:01,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:01,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:01,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:01,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:01,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:01,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:01,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:01,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 23 refuted. 2 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:45:01,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632537010] [2020-10-13 10:45:01,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:01,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:45:01,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267822641] [2020-10-13 10:45:01,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:45:01,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:01,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:45:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2020-10-13 10:45:01,714 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2020-10-13 10:45:01,975 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-10-13 10:45:04,211 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2020-10-13 10:45:12,950 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)) 65520)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)) 65526)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) 65522)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)) 65524))) is different from false [2020-10-13 10:45:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:15,373 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-10-13 10:45:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:45:15,373 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:45:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:15,375 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:45:15,375 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:45:15,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=52, Invalid=82, Unknown=2, NotChecked=20, Total=156 [2020-10-13 10:45:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:45:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-10-13 10:45:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:45:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 10:45:15,387 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 30 [2020-10-13 10:45:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:15,387 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 10:45:15,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:45:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 10:45:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:45:15,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:15,388 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:15,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:45:15,389 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:15,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1804868725, now seen corresponding path program 10 times [2020-10-13 10:45:15,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:15,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396654823] [2020-10-13 10:45:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:15,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:15,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:16,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:16,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:45:16,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:45:16,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1067 [2020-10-13 10:45:16,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:16,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:45:16,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:16,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:45:16,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:16,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:16,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:16,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:16,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:16,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:16,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:16,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:16,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:16,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:16,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:16,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 10:45:16,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396654823] [2020-10-13 10:45:16,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:16,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:45:16,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986683466] [2020-10-13 10:45:16,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:45:16,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:16,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:45:16,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:45:16,563 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2020-10-13 10:45:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:16,635 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-13 10:45:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:45:16,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 10:45:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:16,637 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:45:16,637 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:45:16,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:45:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:45:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 10:45:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:45:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-13 10:45:16,649 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2020-10-13 10:45:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:16,650 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-13 10:45:16,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:45:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-13 10:45:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:45:16,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:16,652 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:16,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:45:16,655 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash -480289400, now seen corresponding path program 11 times [2020-10-13 10:45:16,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:16,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431523095] [2020-10-13 10:45:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:16,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:16,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:17,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:17,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:45:17,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:45:17,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1320 [2020-10-13 10:45:17,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:17,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:45:17,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:45:17,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:45:17,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:18,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:18,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:18,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:18,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:18,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:18,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:18,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:18,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:18,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:18,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:18,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:45:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:45:18,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431523095] [2020-10-13 10:45:18,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:18,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:45:18,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134911009] [2020-10-13 10:45:18,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:45:18,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:18,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:45:18,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:45:18,266 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2020-10-13 10:45:18,933 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-13 10:45:19,145 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-10-13 10:45:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:26,810 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-10-13 10:45:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:45:26,811 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-13 10:45:26,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:26,812 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:45:26,812 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:45:26,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:45:26,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:45:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-13 10:45:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:45:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 10:45:26,820 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 34 [2020-10-13 10:45:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:26,821 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 10:45:26,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:45:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 10:45:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:45:26,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:26,822 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:26,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:45:26,822 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:26,823 INFO L82 PathProgramCache]: Analyzing trace with hash -864022397, now seen corresponding path program 12 times [2020-10-13 10:45:26,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:26,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932360265] [2020-10-13 10:45:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:26,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:26,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:28,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:28,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:45:28,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:45:28,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1312 [2020-10-13 10:45:28,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:28,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:45:28,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:28,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:45:28,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:28,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:28,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:28,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:28,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:28,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:28,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:28,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:28,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:28,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:28,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:45:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:45:28,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932360265] [2020-10-13 10:45:28,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:28,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:45:28,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348922323] [2020-10-13 10:45:28,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:45:28,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:28,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:45:28,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:45:28,274 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 9 states. [2020-10-13 10:45:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:28,392 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2020-10-13 10:45:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:45:28,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 10:45:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:28,395 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:45:28,395 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:45:28,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:45:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:45:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:45:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:45:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-13 10:45:28,420 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2020-10-13 10:45:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:28,420 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-13 10:45:28,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:45:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-13 10:45:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:45:28,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:28,422 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:28,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:45:28,422 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:28,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash 553403392, now seen corresponding path program 13 times [2020-10-13 10:45:28,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:28,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070797224] [2020-10-13 10:45:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:28,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:29,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:30,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:30,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:45:30,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:45:30,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1595 [2020-10-13 10:45:30,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:45:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:45:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:45:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:30,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:30,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:30,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:30,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:30,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:30,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:30,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:30,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:30,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:30,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:30,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 10:45:30,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070797224] [2020-10-13 10:45:30,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:30,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:45:30,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485453234] [2020-10-13 10:45:30,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:45:30,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:30,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:45:30,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:45:30,232 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2020-10-13 10:45:30,719 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-13 10:45:35,154 WARN L193 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-13 10:45:38,205 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-10-13 10:45:49,026 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 (- 1)))) (and (<= 1 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 65520) 4294967296)))) (<= 5 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 65524) 4294967296)))) (<= 7 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 65526) 4294967296)))) (<= 11 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 65530) 4294967296)))) (<= 3 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 65522) 4294967296)))) (<= 9 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 65528) 4294967296)))))) is different from false [2020-10-13 10:45:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:49,050 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-13 10:45:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:45:49,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 10:45:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:49,051 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:45:49,052 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:45:49,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=96, Invalid=178, Unknown=2, NotChecked=30, Total=306 [2020-10-13 10:45:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:45:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-13 10:45:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:45:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-13 10:45:49,060 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 38 [2020-10-13 10:45:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:49,060 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-13 10:45:49,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:45:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-13 10:45:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:45:49,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:49,065 INFO L422 BasicCegarLoop]: trace histogram [15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:49,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:45:49,065 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:49,066 INFO L82 PathProgramCache]: Analyzing trace with hash 377305339, now seen corresponding path program 14 times [2020-10-13 10:45:49,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:49,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530474786] [2020-10-13 10:45:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:49,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:49,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:50,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:50,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:45:50,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:45:50,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1487 [2020-10-13 10:45:50,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:45:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:45:50,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:50,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:50,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:50,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:50,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:50,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:50,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:50,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:50,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:50,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:50,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:50,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 10:45:50,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530474786] [2020-10-13 10:45:50,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:50,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:45:50,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344294960] [2020-10-13 10:45:50,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:45:50,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:50,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:45:50,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:45:50,694 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-10-13 10:45:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:50,831 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-13 10:45:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:45:50,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 10:45:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:50,833 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:45:50,833 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:45:50,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:45:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:45:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 10:45:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:45:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-13 10:45:50,848 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 40 [2020-10-13 10:45:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:50,848 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-13 10:45:50,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:45:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-13 10:45:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:45:50,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:50,852 INFO L422 BasicCegarLoop]: trace histogram [16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:50,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:45:50,853 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:50,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1568053768, now seen corresponding path program 15 times [2020-10-13 10:45:50,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:50,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227197576] [2020-10-13 10:45:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:50,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:51,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:52,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:52,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:45:52,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:45:52,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1828 [2020-10-13 10:45:52,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:52,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:45:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:45:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:45:52,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:53,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:53,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:53,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:53,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:53,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:53,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:53,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 64 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 10:45:53,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227197576] [2020-10-13 10:45:53,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:53,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:45:53,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212690390] [2020-10-13 10:45:53,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:45:53,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:53,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:45:53,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:45:53,054 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 11 states. [2020-10-13 10:45:57,965 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-13 10:46:00,281 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-13 10:46:02,567 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 61 DAG size of output: 19 [2020-10-13 10:46:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:12,603 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-13 10:46:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:46:12,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-13 10:46:12,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:12,605 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:46:12,605 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:46:12,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=127, Invalid=252, Unknown=1, NotChecked=0, Total=380 [2020-10-13 10:46:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:46:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-10-13 10:46:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:46:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-13 10:46:12,614 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 42 [2020-10-13 10:46:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:12,614 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-13 10:46:12,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:46:12,614 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-13 10:46:12,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:46:12,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:12,615 INFO L422 BasicCegarLoop]: trace histogram [17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:12,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:46:12,615 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:12,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1766440179, now seen corresponding path program 16 times [2020-10-13 10:46:12,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:12,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532147266] [2020-10-13 10:46:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:12,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:12,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:13,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:14,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:14,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:46:14,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:46:14,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1955 [2020-10-13 10:46:14,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:46:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:46:14,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:14,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:14,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:14,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:14,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:14,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:14,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:46:14,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:14,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:14,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:14,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:14,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:46:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 10:46:14,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532147266] [2020-10-13 10:46:14,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:14,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:46:14,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916397825] [2020-10-13 10:46:14,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:46:14,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:14,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:46:14,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:46:14,734 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 11 states. [2020-10-13 10:46:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:14,890 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-10-13 10:46:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:46:14,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 10:46:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:14,892 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:46:14,892 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:46:14,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:46:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:46:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:46:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:46:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-13 10:46:14,907 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 44 [2020-10-13 10:46:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:14,907 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-13 10:46:14,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:46:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-13 10:46:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:46:14,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:14,910 INFO L422 BasicCegarLoop]: trace histogram [18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:14,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:46:14,910 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:14,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1991433360, now seen corresponding path program 17 times [2020-10-13 10:46:14,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:14,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311389842] [2020-10-13 10:46:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:14,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:15,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:17,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:17,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:46:17,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:46:17,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2138 [2020-10-13 10:46:17,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:46:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 10:46:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:46:17,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:21,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:21,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:21,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:21,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:21,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:21,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:46:21,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:21,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:21,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:21,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:21,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 77 refuted. 4 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 10:46:21,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311389842] [2020-10-13 10:46:21,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:21,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:46:21,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734695571] [2020-10-13 10:46:21,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:46:21,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:46:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=100, Unknown=2, NotChecked=0, Total=132 [2020-10-13 10:46:21,451 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 12 states. [2020-10-13 10:46:25,924 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 10:46:28,874 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 10:46:31,772 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 10:46:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:58,054 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-13 10:46:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:46:58,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 10:46:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:58,055 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:46:58,055 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:46:58,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=125, Invalid=251, Unknown=4, NotChecked=0, Total=380 [2020-10-13 10:46:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:46:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-13 10:46:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:46:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-13 10:46:58,064 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 46 [2020-10-13 10:46:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:58,065 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-13 10:46:58,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:46:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-13 10:46:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:46:58,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:58,066 INFO L422 BasicCegarLoop]: trace histogram [19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:58,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:46:58,066 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1374421909, now seen corresponding path program 18 times [2020-10-13 10:46:58,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:58,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674200306] [2020-10-13 10:46:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:58,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:58,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:58,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:59,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:59,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:46:59,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:46:59,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1695 [2020-10-13 10:46:59,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:46:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:46:59,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:59,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:59,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:59,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:59,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:59,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:59,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:59,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:59,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 90 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 10:46:59,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674200306] [2020-10-13 10:46:59,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:59,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:46:59,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209757527] [2020-10-13 10:46:59,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:46:59,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:46:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:46:59,922 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 12 states. [2020-10-13 10:47:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:00,098 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-10-13 10:47:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:47:00,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-13 10:47:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:00,100 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:47:00,100 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 10:47:00,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:47:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 10:47:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 10:47:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:47:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-13 10:47:00,108 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 48 [2020-10-13 10:47:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:00,109 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-13 10:47:00,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:47:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-13 10:47:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:47:00,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:00,110 INFO L422 BasicCegarLoop]: trace histogram [20, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:00,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:47:00,110 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:00,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1193943960, now seen corresponding path program 19 times [2020-10-13 10:47:00,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:00,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611778395] [2020-10-13 10:47:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:47:02,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2402 [2020-10-13 10:47:02,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:47:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 10:47:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:47:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:09,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:09,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:09,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:09,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:09,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:09,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:09,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:09,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:09,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:09,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:09,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 96 refuted. 4 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 10:47:09,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611778395] [2020-10-13 10:47:09,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:09,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:47:09,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114083602] [2020-10-13 10:47:09,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:47:09,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:09,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:47:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2020-10-13 10:47:09,030 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 13 states. [2020-10-13 10:47:09,781 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 10:47:14,294 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 10:47:17,519 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 10:47:40,260 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 10:48:03,331 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 10:48:13,521 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 10:48:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:13,548 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-10-13 10:48:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:48:13,550 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 10:48:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:13,551 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:48:13,551 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:48:13,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=213, Invalid=425, Unknown=12, NotChecked=0, Total=650 [2020-10-13 10:48:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:48:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-10-13 10:48:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:48:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-13 10:48:13,560 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 50 [2020-10-13 10:48:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:13,560 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-13 10:48:13,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:48:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-13 10:48:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:48:13,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:13,561 INFO L422 BasicCegarLoop]: trace histogram [21, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:13,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:48:13,561 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:13,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:13,562 INFO L82 PathProgramCache]: Analyzing trace with hash 508712803, now seen corresponding path program 20 times [2020-10-13 10:48:13,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:13,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596942732] [2020-10-13 10:48:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:13,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:13,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:14,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:15,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:15,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:48:15,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:15,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2236 [2020-10-13 10:48:15,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:48:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:48:15,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:15,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:15,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:15,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:15,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:15,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:15,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:15,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:15,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:15,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:15,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:15,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 110 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 10:48:15,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596942732] [2020-10-13 10:48:15,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:15,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:48:15,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908851248] [2020-10-13 10:48:16,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:48:16,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:16,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:48:16,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:48:16,001 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 13 states. [2020-10-13 10:48:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:16,174 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-10-13 10:48:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:48:16,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 10:48:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:16,176 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:48:16,176 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:48:16,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:48:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:48:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:48:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:48:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-13 10:48:16,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 52 [2020-10-13 10:48:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:16,186 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-13 10:48:16,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:48:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-13 10:48:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:48:16,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:16,187 INFO L422 BasicCegarLoop]: trace histogram [22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:16,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:48:16,187 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash 888795360, now seen corresponding path program 21 times [2020-10-13 10:48:16,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:16,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095652376] [2020-10-13 10:48:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:16,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:16,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:17,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:18,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:18,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:48:18,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:18,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2592 [2020-10-13 10:48:18,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:18,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:48:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 10:48:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:48:18,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:29,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:29,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:29,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:29,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:29,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:29,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:29,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:29,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:29,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:29,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:29,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 113 refuted. 8 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-13 10:48:29,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095652376] [2020-10-13 10:48:29,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:29,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:48:29,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048497525] [2020-10-13 10:48:29,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:48:29,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:48:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=142, Unknown=5, NotChecked=0, Total=182 [2020-10-13 10:48:29,465 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 14 states. [2020-10-13 10:48:32,244 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 10:48:36,445 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 17 [2020-10-13 10:48:41,056 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 10:48:50,747 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 10:48:54,963 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) 65532)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)) 65530)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)) 65528)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 19)) 4294967296)) 65538)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 21)) 4294967296)) 65540)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)) 65520)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 17)) 4294967296)) 65536)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) 65522)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 15)) 4294967296)) 65534)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)) 65524))) is different from false [2020-10-13 10:48:58,048 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 10:49:05,058 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17