/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:26:56,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:26:56,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:26:56,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:26:56,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:26:56,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:26:56,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:26:56,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:26:56,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:26:56,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:26:56,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:26:56,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:26:56,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:26:56,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:26:56,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:26:56,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:26:56,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:26:56,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:26:56,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:26:56,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:26:56,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:26:56,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:26:56,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:26:56,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:26:56,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:26:56,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:26:56,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:26:56,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:26:56,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:26:56,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:26:56,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:26:56,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:26:56,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:26:56,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:26:56,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:26:56,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:26:56,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:26:56,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:26:56,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:26:56,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:26:56,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:26:56,510 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:26:56,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:26:56,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:26:56,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:26:56,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:26:56,533 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:26:56,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:26:56,534 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:26:56,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:26:56,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:26:56,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:26:56,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:26:56,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:26:56,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:26:56,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:26:56,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:26:56,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:26:56,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:26:56,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:26:56,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:26:56,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:26:56,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:26:56,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:26:56,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:26:56,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:26:56,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:26:56,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:26:56,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:26:56,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:26:56,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:26:56,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:26:56,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:26:56,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:26:56,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:26:56,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:26:56,832 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:26:56,832 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-14 05:26:56,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78968c2dc/a8a786e02ca34205810ee0648ebe8534/FLAG0cdaac525 [2020-10-14 05:26:57,337 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:26:57,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-14 05:26:57,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78968c2dc/a8a786e02ca34205810ee0648ebe8534/FLAG0cdaac525 [2020-10-14 05:26:57,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78968c2dc/a8a786e02ca34205810ee0648ebe8534 [2020-10-14 05:26:57,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:26:57,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:26:57,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:26:57,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:26:57,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:26:57,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:26:57" (1/1) ... [2020-10-14 05:26:57,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2939e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57, skipping insertion in model container [2020-10-14 05:26:57,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:26:57" (1/1) ... [2020-10-14 05:26:57,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:26:57,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:26:57,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:26:57,926 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:26:57,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:26:57,955 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:26:57,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57 WrapperNode [2020-10-14 05:26:57,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:26:57,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:26:57,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:26:57,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:26:57,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57" (1/1) ... [2020-10-14 05:26:57,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57" (1/1) ... [2020-10-14 05:26:57,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57" (1/1) ... [2020-10-14 05:26:57,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57" (1/1) ... [2020-10-14 05:26:57,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57" (1/1) ... [2020-10-14 05:26:57,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57" (1/1) ... [2020-10-14 05:26:57,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57" (1/1) ... [2020-10-14 05:26:58,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:26:58,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:26:58,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:26:58,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:26:58,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:26:58,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:26:58,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:26:58,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:26:58,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:26:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:26:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:26:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:26:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:26:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:26:58,283 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:26:58,283 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:26:58,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:26:58 BoogieIcfgContainer [2020-10-14 05:26:58,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:26:58,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:26:58,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:26:58,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:26:58,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:26:57" (1/3) ... [2020-10-14 05:26:58,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc9dc84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:26:58, skipping insertion in model container [2020-10-14 05:26:58,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:26:57" (2/3) ... [2020-10-14 05:26:58,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc9dc84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:26:58, skipping insertion in model container [2020-10-14 05:26:58,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:26:58" (3/3) ... [2020-10-14 05:26:58,295 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2020-10-14 05:26:58,305 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:26:58,311 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:26:58,325 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:26:58,346 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:26:58,346 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:26:58,346 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:26:58,347 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:26:58,347 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:26:58,347 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:26:58,347 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:26:58,347 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:26:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-14 05:26:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:26:58,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:58,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:58,372 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:58,376 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-14 05:26:58,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:58,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941661674] [2020-10-14 05:26:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:58,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:58,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:58,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:26:58,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:58,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-14 05:26:58,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:58,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:58,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:58,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:26:58,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:58,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:26:58,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:58,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:58,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:58,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:58,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:58,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:26:58,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:58,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:58,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:58,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941661674] [2020-10-14 05:26:58,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:26:58,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:26:58,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019674676] [2020-10-14 05:26:58,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:26:58,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:58,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:26:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:26:58,569 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-14 05:26:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:58,592 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-14 05:26:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:26:58,593 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 05:26:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:58,601 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:26:58,602 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 05:26:58,605 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 [2020-10-14 05:26:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 05:26:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 05:26:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 05:26:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-14 05:26:58,653 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-14 05:26:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:58,653 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-14 05:26:58,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:26:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-14 05:26:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:26:58,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:58,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:58,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:26:58,656 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2020-10-14 05:26:58,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:58,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351446692] [2020-10-14 05:26:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:58,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:58,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:58,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:26:58,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:58,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-14 05:26:58,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:58,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:58,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:26:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:26:58,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:26:58,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:58,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:58,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:58,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:58,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:58,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:26:58,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:58,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:58,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:58,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:58,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:58,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:58,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351446692] [2020-10-14 05:26:58,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:26:58,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:26:58,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40092285] [2020-10-14 05:26:58,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:26:58,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:26:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:26:58,840 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-14 05:26:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:58,868 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-14 05:26:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:26:58,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:26:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:58,870 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:26:58,870 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:26:58,872 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 [2020-10-14 05:26:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:26:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:26:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:26:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 05:26:58,878 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 05:26:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:58,879 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 05:26:58,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:26:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 05:26:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:26:58,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:58,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:58,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:26:58,881 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:58,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-14 05:26:58,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:58,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922037643] [2020-10-14 05:26:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:58,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:58,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:58,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:26:58,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-14 05:26:58,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:58,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:26:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:26:58,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:59,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:59,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:59,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:59,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 05:26:59,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:59,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:59,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:59,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:59,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:59,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:26:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:59,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922037643] [2020-10-14 05:26:59,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:26:59,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:26:59,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316059246] [2020-10-14 05:26:59,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:26:59,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:59,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:26:59,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:26:59,070 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-14 05:26:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:59,121 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-14 05:26:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:26:59,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 05:26:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:59,126 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:26:59,127 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:26:59,128 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 [2020-10-14 05:26:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:26:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 05:26:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:26:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 05:26:59,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-14 05:26:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:59,136 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 05:26:59,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:26:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 05:26:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:26:59,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:59,137 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:59,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:26:59,138 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:59,138 INFO L82 PathProgramCache]: Analyzing trace with hash -109889104, now seen corresponding path program 1 times [2020-10-14 05:26:59,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:59,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019272991] [2020-10-14 05:26:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:59,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:59,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:26:59,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:59,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-14 05:26:59,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:59,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:59,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:26:59,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:59,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:26:59,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:26:59,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:59,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:59,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:59,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:59,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:26:59,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:59,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:59,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:59,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:59,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:59,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:59,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019272991] [2020-10-14 05:26:59,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:59,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:26:59,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037005682] [2020-10-14 05:26:59,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:26:59,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:59,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:26:59,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:26:59,382 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-14 05:26:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:59,411 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-14 05:26:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:26:59,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:26:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:59,413 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:26:59,413 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:26:59,414 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 [2020-10-14 05:26:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:26:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:26:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:26:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-14 05:26:59,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-14 05:26:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:59,420 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-14 05:26:59,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:26:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-14 05:26:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:26:59,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:59,421 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:59,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:26:59,421 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash -582276883, now seen corresponding path program 2 times [2020-10-14 05:26:59,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:59,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609905338] [2020-10-14 05:26:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:59,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:59,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:26:59,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:59,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-14 05:26:59,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:59,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:59,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:26:59,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:59,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:26:59,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:59,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:59,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:59,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:59,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:59,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:59,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:59,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:59,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:59,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:59,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:59,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609905338] [2020-10-14 05:26:59,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:59,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:26:59,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774428164] [2020-10-14 05:26:59,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:26:59,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:59,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:26:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:26:59,725 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-14 05:26:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:59,759 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:26:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:26:59,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:26:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:59,761 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:26:59,761 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:26:59,761 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 [2020-10-14 05:26:59,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:26:59,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:26:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:26:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 05:26:59,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-14 05:26:59,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:59,768 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 05:26:59,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:26:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 05:26:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:26:59,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:59,769 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:59,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:26:59,769 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:59,770 INFO L82 PathProgramCache]: Analyzing trace with hash 719600874, now seen corresponding path program 3 times [2020-10-14 05:26:59,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:59,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391691061] [2020-10-14 05:26:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:59,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:59,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:26:59,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:59,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-14 05:26:59,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:59,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:26:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:26:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:26:59,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:59,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:59,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:59,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:59,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:59,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:26:59,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:59,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:59,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:59,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:59,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:59,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:26:59,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391691061] [2020-10-14 05:26:59,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:59,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:26:59,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096113824] [2020-10-14 05:26:59,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:26:59,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:59,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:26:59,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:26:59,997 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-14 05:27:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:00,044 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:27:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:27:00,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-14 05:27:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:00,048 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:27:00,049 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:27:00,049 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 [2020-10-14 05:27:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:27:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 05:27:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:27:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-14 05:27:00,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-14 05:27:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:00,060 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-14 05:27:00,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:27:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-14 05:27:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:27:00,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:00,062 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:00,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:27:00,062 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1179295589, now seen corresponding path program 4 times [2020-10-14 05:27:00,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:00,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772753056] [2020-10-14 05:27:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:00,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:00,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:27:00,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:00,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-14 05:27:00,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:00,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:00,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:27:00,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:00,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:27:00,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:00,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:00,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:00,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:00,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:00,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:00,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:00,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:00,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:00,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:00,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:00,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:27:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:27:00,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772753056] [2020-10-14 05:27:00,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:00,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:27:00,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853864432] [2020-10-14 05:27:00,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:27:00,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:00,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:27:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:27:00,338 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-14 05:27:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:00,381 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:27:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:27:00,382 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:27:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:00,383 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:27:00,383 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:27:00,383 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 [2020-10-14 05:27:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:27:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 05:27:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:27:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 05:27:00,390 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-14 05:27:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:00,390 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 05:27:00,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:27:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 05:27:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:27:00,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:00,391 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:00,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:27:00,392 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash 957312226, now seen corresponding path program 5 times [2020-10-14 05:27:00,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:00,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289405694] [2020-10-14 05:27:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:00,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:00,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:27:00,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:00,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-14 05:27:00,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:00,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:00,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:27:00,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:27:00,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:27:00,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:00,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:00,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:00,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:00,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:00,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:00,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:00,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:00,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:00,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:27:00,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289405694] [2020-10-14 05:27:00,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:00,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:27:00,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781457713] [2020-10-14 05:27:00,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:27:00,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:00,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:27:00,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:27:00,645 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-14 05:27:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:00,749 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:27:00,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:27:00,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 05:27:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:00,751 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:27:00,751 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:27:00,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:27:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:27:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-14 05:27:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:27:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:27:00,758 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2020-10-14 05:27:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:00,758 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:27:00,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:27:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:27:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:27:00,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:00,760 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:00,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:27:00,760 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:00,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1986638173, now seen corresponding path program 6 times [2020-10-14 05:27:00,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:00,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221162305] [2020-10-14 05:27:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:01,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:27:01,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:01,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-14 05:27:01,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:01,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:01,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:27:01,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:01,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:27:01,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:01,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:01,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:01,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:01,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:01,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:01,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:01,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:01,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:01,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:01,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:01,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:27:01,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221162305] [2020-10-14 05:27:01,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:01,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:27:01,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117504975] [2020-10-14 05:27:01,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:27:01,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:01,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:27:01,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:27:01,141 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-10-14 05:27:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:01,195 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-14 05:27:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:27:01,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 05:27:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:01,197 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:27:01,197 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:27:01,197 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 [2020-10-14 05:27:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:27:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 05:27:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:27:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-14 05:27:01,203 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2020-10-14 05:27:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:01,204 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-14 05:27:01,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:27:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-14 05:27:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:27:01,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:01,205 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:01,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:27:01,205 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:01,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1226737574, now seen corresponding path program 7 times [2020-10-14 05:27:01,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:01,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849037558] [2020-10-14 05:27:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:01,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:01,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:27:01,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:01,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-14 05:27:01,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:01,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:01,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:27:01,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:01,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:27:01,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:01,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:01,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:01,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:01,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:01,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:01,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:01,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:01,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:01,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:27:01,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849037558] [2020-10-14 05:27:01,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:01,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:27:01,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964626551] [2020-10-14 05:27:01,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:27:01,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:01,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:27:01,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:27:01,707 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 8 states. [2020-10-14 05:27:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:01,829 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-14 05:27:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:27:01,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 05:27:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:01,831 INFO L225 Difference]: With dead ends: 41 [2020-10-14 05:27:01,831 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:27:01,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:27:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:27:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 05:27:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:27:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 05:27:01,844 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2020-10-14 05:27:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:01,844 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 05:27:01,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:27:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 05:27:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:27:01,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:01,846 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:01,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:27:01,846 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:01,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1199344617, now seen corresponding path program 8 times [2020-10-14 05:27:01,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:01,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004366752] [2020-10-14 05:27:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:01,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:02,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:02,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:27:02,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:02,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-14 05:27:02,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:02,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:27:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:27:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:27:02,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:02,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:02,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:02,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:02,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:02,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:02,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:27:02,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:02,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:02,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:02,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:02,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:02,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:27:02,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004366752] [2020-10-14 05:27:02,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:02,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:27:02,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640197902] [2020-10-14 05:27:02,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:27:02,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:02,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:27:02,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:27:02,337 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-10-14 05:27:02,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:02,655 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-14 05:27:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:27:02,657 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-14 05:27:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:02,657 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:27:02,658 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:27:02,659 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 [2020-10-14 05:27:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:27:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-14 05:27:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:27:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 05:27:02,667 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2020-10-14 05:27:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:02,668 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 05:27:02,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:27:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 05:27:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:27:02,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:02,672 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:02,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:27:02,672 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash -386351278, now seen corresponding path program 9 times [2020-10-14 05:27:02,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:02,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697931054] [2020-10-14 05:27:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:02,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:02,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:03,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:03,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:27:03,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:03,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-14 05:27:03,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:03,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:27:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:03,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:27:03,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:03,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:03,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:03,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:03,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:03,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:03,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:03,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:03,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:03,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:27:03,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697931054] [2020-10-14 05:27:03,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:03,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:27:03,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474631351] [2020-10-14 05:27:03,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:27:03,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:03,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:27:03,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:27:03,431 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2020-10-14 05:27:03,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:03,515 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-14 05:27:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:27:03,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-14 05:27:03,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:03,517 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:27:03,517 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:27:03,517 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 [2020-10-14 05:27:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:27:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 05:27:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:27:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-14 05:27:03,523 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2020-10-14 05:27:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:03,523 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-14 05:27:03,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:27:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-14 05:27:03,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:27:03,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:03,524 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:03,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:27:03,525 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:03,525 INFO L82 PathProgramCache]: Analyzing trace with hash 227316879, now seen corresponding path program 10 times [2020-10-14 05:27:03,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:03,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445936360] [2020-10-14 05:27:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:03,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:03,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:04,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:04,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:27:04,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:04,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-14 05:27:04,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:04,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:04,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:27:04,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:27:04,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:27:04,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:04,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:04,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:04,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:04,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:04,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:04,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:04,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:04,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:04,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:04,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:04,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:04,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-14 05:27:04,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445936360] [2020-10-14 05:27:04,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:04,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:27:04,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960242023] [2020-10-14 05:27:04,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:27:04,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:04,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:27:04,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:27:04,162 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-10-14 05:27:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:09,371 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-14 05:27:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:27:09,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-14 05:27:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:09,372 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:27:09,373 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:27:09,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:27:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:27:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-14 05:27:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:27:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 05:27:09,385 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2020-10-14 05:27:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:09,385 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 05:27:09,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:27:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 05:27:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:27:09,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:09,386 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:09,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:27:09,386 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:09,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:09,387 INFO L82 PathProgramCache]: Analyzing trace with hash 540778954, now seen corresponding path program 11 times [2020-10-14 05:27:09,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:09,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362592964] [2020-10-14 05:27:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:09,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:09,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:10,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:10,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:27:10,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:10,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-10-14 05:27:10,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:10,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:27:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:27:10,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:10,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:10,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:10,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:10,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:10,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:10,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:10,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:10,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:10,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:10,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:10,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 05:27:10,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362592964] [2020-10-14 05:27:10,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:10,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:27:10,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038655778] [2020-10-14 05:27:10,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:27:10,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:27:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:27:10,336 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 10 states. [2020-10-14 05:27:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:10,444 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-14 05:27:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:27:10,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-14 05:27:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:10,446 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:27:10,446 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:27:10,447 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 [2020-10-14 05:27:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:27:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 05:27:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:27:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 05:27:10,456 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 34 [2020-10-14 05:27:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:10,456 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 05:27:10,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:27:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 05:27:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:27:10,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:10,457 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:10,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:27:10,458 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:10,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2143776633, now seen corresponding path program 12 times [2020-10-14 05:27:10,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:10,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34966916] [2020-10-14 05:27:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:10,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:10,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:11,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:11,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:27:11,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:11,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-14 05:27:11,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:11,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:11,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:27:11,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:27:11,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:27:11,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:13,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:13,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:13,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:13,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:13,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:13,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:13,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:13,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:13,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-14 05:27:13,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34966916] [2020-10-14 05:27:13,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:13,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:27:13,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271400831] [2020-10-14 05:27:13,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:27:13,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:13,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:27:13,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2020-10-14 05:27:13,707 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-10-14 05:27:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:20,829 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-10-14 05:27:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:27:20,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-14 05:27:20,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:20,830 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:27:20,830 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:27:20,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=63, Invalid=117, Unknown=2, NotChecked=0, Total=182 [2020-10-14 05:27:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:27:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-14 05:27:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:27:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-14 05:27:20,839 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2020-10-14 05:27:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:20,840 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-14 05:27:20,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:27:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-14 05:27:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:27:20,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:20,841 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:20,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:27:20,841 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:20,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:20,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1747419198, now seen corresponding path program 13 times [2020-10-14 05:27:20,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:20,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956422092] [2020-10-14 05:27:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:20,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:22,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:22,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:27:22,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:22,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-14 05:27:22,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:22,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:27:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:27:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:22,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:22,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:22,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:22,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:22,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:22,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:22,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:22,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:22,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 05:27:22,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956422092] [2020-10-14 05:27:22,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:22,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:27:22,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175786097] [2020-10-14 05:27:22,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:27:22,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:22,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:27:22,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:27:22,159 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2020-10-14 05:27:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:22,282 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-14 05:27:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:27:22,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-14 05:27:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:22,283 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:27:22,284 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:27:22,285 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 [2020-10-14 05:27:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:27:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 05:27:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:27:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-14 05:27:22,298 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2020-10-14 05:27:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:22,298 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-14 05:27:22,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:27:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-14 05:27:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:27:22,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:22,301 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:22,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:27:22,302 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:22,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1105868801, now seen corresponding path program 14 times [2020-10-14 05:27:22,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:22,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057458439] [2020-10-14 05:27:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:22,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:22,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:23,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:23,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:27:23,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:23,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1230 [2020-10-14 05:27:23,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:23,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:23,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:27:23,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:27:23,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:23,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:23,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:23,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:23,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:23,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:23,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:23,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:23,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:23,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:23,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:23,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 05:27:23,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057458439] [2020-10-14 05:27:23,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:23,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:27:23,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965107281] [2020-10-14 05:27:23,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:27:23,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:27:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:27:23,715 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 12 states. [2020-10-14 05:27:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:23,887 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-14 05:27:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:27:23,888 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-14 05:27:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:23,889 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:27:23,889 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:27:23,890 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 [2020-10-14 05:27:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:27:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 05:27:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:27:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-14 05:27:23,897 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 40 [2020-10-14 05:27:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:23,897 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-14 05:27:23,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:27:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-14 05:27:23,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:27:23,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:23,898 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:23,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:27:23,898 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1243739388, now seen corresponding path program 15 times [2020-10-14 05:27:23,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:23,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355041264] [2020-10-14 05:27:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:23,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:25,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:25,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:27:25,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:25,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1186 [2020-10-14 05:27:25,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:25,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:25,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:27:25,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 05:27:25,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:27:25,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:25,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:25,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:25,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:25,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:25,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:25,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:25,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:25,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:25,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:25,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:25,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:25,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 130 proven. 36 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-14 05:27:25,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355041264] [2020-10-14 05:27:25,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:25,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:27:25,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53604024] [2020-10-14 05:27:25,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:27:25,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:25,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:27:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:27:25,306 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 9 states. [2020-10-14 05:27:42,647 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-14 05:27:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:48,131 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-10-14 05:27:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:27:48,132 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-14 05:27:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:48,132 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:27:48,132 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 05:27:48,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:27:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 05:27:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2020-10-14 05:27:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:27:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-14 05:27:48,140 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 42 [2020-10-14 05:27:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:48,141 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-14 05:27:48,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:27:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-14 05:27:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:27:48,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:48,142 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:48,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:27:48,142 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1929733385, now seen corresponding path program 16 times [2020-10-14 05:27:48,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:48,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141640485] [2020-10-14 05:27:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:48,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:48,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:49,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:27:49,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1647 [2020-10-14 05:27:49,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:49,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:27:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:27:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:49,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:49,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:49,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:49,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:49,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:49,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:49,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:49,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:49,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:49,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:49,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:27:49,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141640485] [2020-10-14 05:27:49,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:49,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:27:49,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240572433] [2020-10-14 05:27:49,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:27:49,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:49,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:27:49,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:27:49,978 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 13 states. [2020-10-14 05:27:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:50,189 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-14 05:27:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:27:50,194 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-14 05:27:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:50,194 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:27:50,194 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:27:50,196 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 [2020-10-14 05:27:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:27:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-14 05:27:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:27:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-14 05:27:50,211 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 44 [2020-10-14 05:27:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:50,211 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-14 05:27:50,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:27:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-14 05:27:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:27:50,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:50,212 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:50,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:27:50,213 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1392639628, now seen corresponding path program 17 times [2020-10-14 05:27:50,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:50,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136265686] [2020-10-14 05:27:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:50,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:50,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:51,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:51,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:27:51,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:51,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1717 [2020-10-14 05:27:51,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:51,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:51,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:27:51,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 05:27:51,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:27:51,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:52,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:52,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:52,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:52,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:52,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:52,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:52,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:52,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:52,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:52,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:52,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:52,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 165 proven. 49 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 05:27:52,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136265686] [2020-10-14 05:27:52,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:52,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:27:52,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464403313] [2020-10-14 05:27:52,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:27:52,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:27:52,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:27:52,161 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-10-14 05:27:55,656 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-14 05:27:56,082 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-14 05:27:58,486 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2020-10-14 05:28:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:09,878 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-14 05:28:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:28:09,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-14 05:28:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:09,885 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:28:09,885 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:28:09,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=81, Invalid=156, Unknown=3, NotChecked=0, Total=240 [2020-10-14 05:28:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:28:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-14 05:28:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:28:09,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-14 05:28:09,901 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2020-10-14 05:28:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:09,901 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-14 05:28:09,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:28:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-14 05:28:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:28:09,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:09,902 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:09,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:28:09,903 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:09,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1459263121, now seen corresponding path program 18 times [2020-10-14 05:28:09,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:09,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251916436] [2020-10-14 05:28:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:09,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:11,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:11,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:28:11,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:11,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1723 [2020-10-14 05:28:11,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:11,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:28:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:28:11,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:11,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:11,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:11,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:11,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:11,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:11,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:11,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:11,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 180 proven. 132 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 05:28:11,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251916436] [2020-10-14 05:28:11,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:11,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:28:11,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343970341] [2020-10-14 05:28:11,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:28:11,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:28:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:28:11,855 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 14 states. [2020-10-14 05:28:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:12,077 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-10-14 05:28:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:28:12,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-14 05:28:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:12,078 INFO L225 Difference]: With dead ends: 73 [2020-10-14 05:28:12,078 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:28:12,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:28:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:28:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-14 05:28:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:28:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-10-14 05:28:12,087 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2020-10-14 05:28:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:12,087 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-10-14 05:28:12,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:28:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-10-14 05:28:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:28:12,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:12,088 INFO L422 BasicCegarLoop]: trace histogram [20, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:12,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:28:12,088 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:12,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1278785172, now seen corresponding path program 19 times [2020-10-14 05:28:12,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:12,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171861608] [2020-10-14 05:28:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:12,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:13,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:13,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:28:13,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:13,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-10-14 05:28:13,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:13,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:13,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:28:13,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:13,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:28:13,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:13,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:13,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:13,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:13,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:13,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:13,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:13,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:13,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:13,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:13,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:13,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:13,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 195 proven. 156 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 05:28:13,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171861608] [2020-10-14 05:28:13,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:13,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:28:13,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70385649] [2020-10-14 05:28:13,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:28:13,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:13,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:28:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:28:13,979 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 15 states. [2020-10-14 05:28:14,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:14,249 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-10-14 05:28:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:28:14,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-14 05:28:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:14,252 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:28:14,252 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:28:14,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:28:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:28:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 05:28:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 05:28:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-14 05:28:14,266 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 50 [2020-10-14 05:28:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:14,267 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-14 05:28:14,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:28:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-14 05:28:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:28:14,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:14,268 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:14,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:28:14,269 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash 361831977, now seen corresponding path program 20 times [2020-10-14 05:28:14,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:14,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141560628] [2020-10-14 05:28:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:14,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:15,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:15,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:28:15,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:15,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1567 [2020-10-14 05:28:15,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:15,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:28:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 05:28:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:28:15,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:16,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:16,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:16,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:16,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:16,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:16,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:16,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:16,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:16,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:16,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:16,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 221 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-14 05:28:16,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141560628] [2020-10-14 05:28:16,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:16,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:28:16,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733062906] [2020-10-14 05:28:16,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:28:16,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:16,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:28:16,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:28:16,615 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 11 states. [2020-10-14 05:28:20,049 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-14 05:28:20,844 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-14 05:28:21,700 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-14 05:28:27,451 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2020-10-14 05:28:32,185 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-14 05:28:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:34,293 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-10-14 05:28:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:28:34,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-14 05:28:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:34,295 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:28:34,295 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:28:34,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=113, Invalid=227, Unknown=2, NotChecked=0, Total=342 [2020-10-14 05:28:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:28:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-10-14 05:28:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:28:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-14 05:28:34,303 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 52 [2020-10-14 05:28:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:34,304 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-14 05:28:34,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:28:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-14 05:28:34,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:28:34,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:34,305 INFO L422 BasicCegarLoop]: trace histogram [22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:34,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:28:34,305 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:34,305 INFO L82 PathProgramCache]: Analyzing trace with hash 960769252, now seen corresponding path program 21 times [2020-10-14 05:28:34,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:34,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54017717] [2020-10-14 05:28:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:34,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:34,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:36,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:36,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:28:36,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:36,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1783 [2020-10-14 05:28:36,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:36,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:28:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:28:36,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:36,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:36,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:36,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:36,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:36,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:36,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:36,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:36,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:36,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:36,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:36,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:36,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 238 proven. 182 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:28:36,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54017717] [2020-10-14 05:28:36,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:36,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:28:36,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666774201] [2020-10-14 05:28:36,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:28:36,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:36,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:28:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:28:36,354 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 16 states. [2020-10-14 05:28:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:36,692 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2020-10-14 05:28:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:28:36,694 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-14 05:28:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:36,695 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:28:36,695 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:28:36,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:28:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:28:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 05:28:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:28:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-14 05:28:36,703 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 54 [2020-10-14 05:28:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:36,704 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-14 05:28:36,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:28:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-14 05:28:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:28:36,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:36,705 INFO L422 BasicCegarLoop]: trace histogram [23, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:36,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:28:36,705 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1147886369, now seen corresponding path program 22 times [2020-10-14 05:28:36,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:36,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449994091] [2020-10-14 05:28:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:36,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:36,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:39,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:39,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:28:39,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:39,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2416 [2020-10-14 05:28:39,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:39,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:39,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:28:39,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 05:28:39,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:28:39,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:57,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:57,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:57,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:57,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:57,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:57,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:57,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:57,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:57,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 78 refuted. 3 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-14 05:28:57,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449994091] [2020-10-14 05:28:57,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:57,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:28:57,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472635372] [2020-10-14 05:28:57,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:28:57,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:57,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:28:57,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=97, Unknown=6, NotChecked=0, Total=132 [2020-10-14 05:28:57,675 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2020-10-14 05:29:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:33,929 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2020-10-14 05:29:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:29:33,930 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-14 05:29:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:33,930 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:29:33,930 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:29:33,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=33, Invalid=114, Unknown=9, NotChecked=0, Total=156 [2020-10-14 05:29:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:29:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 05:29:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:29:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-14 05:29:33,939 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 56 [2020-10-14 05:29:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:33,939 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-14 05:29:33,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:29:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-14 05:29:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:29:33,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:33,940 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:33,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:29:33,941 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:33,941 INFO L82 PathProgramCache]: Analyzing trace with hash 444795868, now seen corresponding path program 23 times [2020-10-14 05:29:33,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:33,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194804149] [2020-10-14 05:29:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:36,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:36,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:29:36,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:36,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2920 [2020-10-14 05:29:36,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:36,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:36,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:29:36,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:36,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:29:36,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:37,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:37,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:37,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:37,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:37,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:37,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:37,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:37,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:37,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:37,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:37,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:37,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 05:29:37,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194804149] [2020-10-14 05:29:37,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:37,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:29:37,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232291975] [2020-10-14 05:29:37,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:29:37,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:29:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:29:37,171 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 17 states. [2020-10-14 05:29:37,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:37,543 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-14 05:29:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:29:37,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-14 05:29:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:37,544 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:29:37,545 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:29:37,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:29:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:29:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-14 05:29:37,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:29:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-14 05:29:37,555 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 58 [2020-10-14 05:29:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:37,555 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-14 05:29:37,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:29:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-14 05:29:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:29:37,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:37,556 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:37,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:29:37,557 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:37,557 INFO L82 PathProgramCache]: Analyzing trace with hash -977349735, now seen corresponding path program 24 times [2020-10-14 05:29:37,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:37,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027208653] [2020-10-14 05:29:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:37,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:37,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:40,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:40,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:29:40,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:40,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2725 [2020-10-14 05:29:40,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:40,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:29:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 05:29:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:29:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:45,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:45,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:45,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:45,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:45,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:45,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:45,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:45,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:45,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-14 05:29:45,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027208653] [2020-10-14 05:29:45,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:45,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:29:45,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83063535] [2020-10-14 05:29:45,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:29:45,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:29:45,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=123, Unknown=2, NotChecked=0, Total=156 [2020-10-14 05:29:45,028 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 13 states. [2020-10-14 05:29:48,180 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 19 [2020-10-14 05:29:50,538 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 19 [2020-10-14 05:29:53,039 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-14 05:29:55,518 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-14 05:30:01,901 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2020-10-14 05:30:02,179 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 19 [2020-10-14 05:30:16,785 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 19 [2020-10-14 05:30:21,321 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-14 05:30:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:25,525 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2020-10-14 05:30:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:30:25,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-14 05:30:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:25,527 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:30:25,527 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:30:25,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=171, Invalid=376, Unknown=5, NotChecked=0, Total=552 [2020-10-14 05:30:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:30:25,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-14 05:30:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:30:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-14 05:30:25,537 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 60 [2020-10-14 05:30:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:25,537 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-14 05:30:25,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:30:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-14 05:30:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:30:25,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:25,538 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:25,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:30:25,538 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:25,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1797634476, now seen corresponding path program 25 times [2020-10-14 05:30:25,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:25,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504357954] [2020-10-14 05:30:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:25,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:25,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:27,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:27,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:30:27,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:30:27,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2019 [2020-10-14 05:30:27,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:27,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:30:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:30:27,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:27,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:28,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:28,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:28,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:28,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:30:28,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:28,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:28,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:28,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:30:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 05:30:28,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504357954] [2020-10-14 05:30:28,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:28,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:30:28,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328461894] [2020-10-14 05:30:28,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:30:28,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:30:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:30:28,019 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 18 states. [2020-10-14 05:30:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:28,570 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2020-10-14 05:30:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:30:28,570 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-14 05:30:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:28,571 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:30:28,571 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:30:28,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:30:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:30:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 05:30:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:30:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-14 05:30:28,582 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 62 [2020-10-14 05:30:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:28,583 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-14 05:30:28,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:30:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-14 05:30:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:30:28,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:28,583 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:28,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:30:28,584 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash 692184977, now seen corresponding path program 26 times [2020-10-14 05:30:28,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:28,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766589335] [2020-10-14 05:30:28,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:28,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:28,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:30,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:30,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:30:30,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:30:30,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-14 05:30:30,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:30,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:30:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:30:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:30,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:30,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:30,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:30,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:30,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:30,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:30,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:30,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:30,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:30,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:30:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 05:30:30,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766589335] [2020-10-14 05:30:30,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:30,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:30:30,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028527306] [2020-10-14 05:30:30,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:30:30,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:30:30,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:30,744 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 19 states. [2020-10-14 05:30:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:31,210 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-10-14 05:30:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:30:31,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2020-10-14 05:30:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:31,212 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:30:31,212 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:30:31,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:30:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 05:30:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:30:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-14 05:30:31,224 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 64 [2020-10-14 05:30:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:31,224 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-14 05:30:31,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:30:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-14 05:30:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:30:31,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:31,225 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:31,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:30:31,226 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1111895438, now seen corresponding path program 27 times [2020-10-14 05:30:31,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:31,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679927508] [2020-10-14 05:30:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:31,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:31,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:33,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:33,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:30:33,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:30:33,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2260 [2020-10-14 05:30:33,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:33,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:33,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:30:33,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 05:30:33,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:30:33,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:33,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:33,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:33,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:33,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:33,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:33,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:33,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:33,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:33,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:33,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:33,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:33,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 391 proven. 121 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-14 05:30:33,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679927508] [2020-10-14 05:30:33,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:33,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:30:33,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659406837] [2020-10-14 05:30:33,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:30:33,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:33,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:30:33,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:30:33,951 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 14 states. [2020-10-14 05:30:36,608 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 17 [2020-10-14 05:30:38,526 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-14 05:30:43,109 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-14 05:30:47,061 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-14 05:30:48,418 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-14 05:30:51,400 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 80 DAG size of output: 17 [2020-10-14 05:30:56,358 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2020-10-14 05:31:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:11,346 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-10-14 05:31:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:31:11,347 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-14 05:31:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:11,347 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:31:11,348 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 05:31:11,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=174, Invalid=376, Unknown=2, NotChecked=0, Total=552 [2020-10-14 05:31:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 05:31:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-10-14 05:31:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:31:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-14 05:31:11,360 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 66 [2020-10-14 05:31:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:11,360 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-14 05:31:11,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:31:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-14 05:31:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:31:11,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:11,361 INFO L422 BasicCegarLoop]: trace histogram [29, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:11,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:31:11,361 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:11,362 INFO L82 PathProgramCache]: Analyzing trace with hash 217249545, now seen corresponding path program 28 times [2020-10-14 05:31:11,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:11,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064803115] [2020-10-14 05:31:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:11,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:11,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:13,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:13,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:31:13,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:31:13,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2601 [2020-10-14 05:31:13,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:13,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:13,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:31:13,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:13,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:31:13,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:14,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:14,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:14,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:14,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:14,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:14,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:14,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:14,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 05:31:14,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064803115] [2020-10-14 05:31:14,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:14,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:31:14,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672118054] [2020-10-14 05:31:14,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:31:14,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:14,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:31:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:31:14,363 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 20 states. [2020-10-14 05:31:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:14,865 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-10-14 05:31:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:31:14,866 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-10-14 05:31:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:14,867 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:31:14,867 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:31:14,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:31:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:31:14,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-14 05:31:14,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 05:31:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-14 05:31:14,882 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 68 [2020-10-14 05:31:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:14,882 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-14 05:31:14,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:31:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-14 05:31:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:31:14,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:14,883 INFO L422 BasicCegarLoop]: trace histogram [30, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:14,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:31:14,884 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:14,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:14,884 INFO L82 PathProgramCache]: Analyzing trace with hash -566626682, now seen corresponding path program 29 times [2020-10-14 05:31:14,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:14,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048265456] [2020-10-14 05:31:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:14,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:15,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:19,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:19,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:31:19,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:31:19,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4594 [2020-10-14 05:31:19,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:19,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:19,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:31:19,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 05:31:19,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:31:19,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:19,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:19,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:19,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:19,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:19,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:19,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:19,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:19,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:19,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:19,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:19,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:19,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 450 proven. 144 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-14 05:31:19,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048265456] [2020-10-14 05:31:19,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:19,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:31:19,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043859500] [2020-10-14 05:31:19,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:31:19,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:19,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:31:19,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:31:19,901 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 15 states.