/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:40:05,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:40:05,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:40:05,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:40:05,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:40:05,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:40:05,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:40:05,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:40:05,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:40:05,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:40:05,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:40:05,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:40:05,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:40:05,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:40:05,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:40:05,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:40:05,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:40:05,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:40:05,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:40:05,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:40:05,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:40:05,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:40:05,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:40:05,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:40:05,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:40:05,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:40:05,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:40:05,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:40:05,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:40:05,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:40:05,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:40:05,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:40:05,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:40:05,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:40:05,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:40:05,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:40:05,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:40:05,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:40:05,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:40:05,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:40:05,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:40:05,380 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 [2020-10-27 01:40:05,437 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:40:05,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:40:05,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:40:05,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:40:05,442 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:40:05,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:40:05,443 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:40:05,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:40:05,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:40:05,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:40:05,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:40:05,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:40:05,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:40:05,445 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:40:05,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:40:05,445 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:40:05,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:40:05,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:40:05,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:40:05,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:40:05,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:40:05,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:40:05,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:40:05,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:40:05,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:40:05,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:40:05,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:40:05,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:40:05,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:40:05,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:40:05,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:40:05,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:40:05,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:40:05,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:40:05,857 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:40:05,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-27 01:40:05,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52c554a75/e10e84990a9b49fca15085191ef80fb8/FLAG399198452 [2020-10-27 01:40:06,514 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:40:06,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-27 01:40:06,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52c554a75/e10e84990a9b49fca15085191ef80fb8/FLAG399198452 [2020-10-27 01:40:06,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52c554a75/e10e84990a9b49fca15085191ef80fb8 [2020-10-27 01:40:06,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:40:06,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:40:06,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:06,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:40:06,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:40:06,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:06" (1/1) ... [2020-10-27 01:40:06,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76bc412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:06, skipping insertion in model container [2020-10-27 01:40:06,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:06" (1/1) ... [2020-10-27 01:40:06,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:40:06,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:40:07,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:07,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:40:07,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:07,140 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:40:07,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07 WrapperNode [2020-10-27 01:40:07,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:07,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:40:07,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:40:07,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:40:07,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07" (1/1) ... [2020-10-27 01:40:07,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07" (1/1) ... [2020-10-27 01:40:07,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07" (1/1) ... [2020-10-27 01:40:07,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07" (1/1) ... [2020-10-27 01:40:07,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07" (1/1) ... [2020-10-27 01:40:07,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07" (1/1) ... [2020-10-27 01:40:07,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07" (1/1) ... [2020-10-27 01:40:07,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:40:07,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:40:07,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:40:07,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:40:07,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07" (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 [2020-10-27 01:40:07,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:40:07,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:40:07,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:40:07,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:40:07,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:40:07,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:40:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:40:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:40:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:40:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:40:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:40:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:40:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:40:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:40:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:40:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:40:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:40:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:40:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:40:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:40:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:40:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:40:07,577 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:40:07,577 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:40:07,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:07 BoogieIcfgContainer [2020-10-27 01:40:07,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:40:07,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:40:07,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:40:07,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:40:07,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:40:06" (1/3) ... [2020-10-27 01:40:07,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65da3bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:07, skipping insertion in model container [2020-10-27 01:40:07,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:07" (2/3) ... [2020-10-27 01:40:07,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65da3bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:07, skipping insertion in model container [2020-10-27 01:40:07,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:07" (3/3) ... [2020-10-27 01:40:07,591 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2020-10-27 01:40:07,608 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:40:07,618 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:40:07,651 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:40:07,713 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:40:07,713 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:40:07,713 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:40:07,714 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:40:07,714 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:40:07,714 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:40:07,714 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:40:07,714 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:40:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-27 01:40:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:40:07,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:07,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:07,742 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1023868445, now seen corresponding path program 1 times [2020-10-27 01:40:07,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:07,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909584315] [2020-10-27 01:40:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:07,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:08,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:40:08,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:40:08,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-27 01:40:08,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:40:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:40:08,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 01:40:08,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:08,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:08,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:08,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:08,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:40:08,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:08,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:08,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:08,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:08,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:08,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909584315] [2020-10-27 01:40:08,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:40:08,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:40:08,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455869107] [2020-10-27 01:40:08,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:40:08,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:08,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:40:08,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:40:08,612 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-10-27 01:40:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:08,904 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2020-10-27 01:40:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:40:08,906 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:40:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:08,914 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:40:08,914 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:40:08,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:40:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:40:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:40:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:40:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 01:40:08,962 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-27 01:40:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:08,962 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 01:40:08,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:40:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 01:40:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:40:08,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:08,964 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:08,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:40:08,964 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash -125854589, now seen corresponding path program 1 times [2020-10-27 01:40:08,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:08,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195508602] [2020-10-27 01:40:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:08,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:09,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:09,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:09,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:40:09,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:09,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-27 01:40:09,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:40:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:40:09,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:09,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:09,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:09,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:09,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:09,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:09,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:40:09,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:09,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:09,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:09,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:09,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:09,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195508602] [2020-10-27 01:40:09,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:09,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:40:09,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964884611] [2020-10-27 01:40:09,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:40:09,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:09,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:40:09,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:40:09,293 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-27 01:40:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:09,528 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 01:40:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:40:09,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 01:40:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:09,531 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:40:09,531 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:40:09,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:40:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:40:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:40:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-27 01:40:09,540 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-10-27 01:40:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:09,541 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-27 01:40:09,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:40:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-27 01:40:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:40:09,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:09,543 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:09,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:40:09,543 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1615401410, now seen corresponding path program 2 times [2020-10-27 01:40:09,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:09,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752751734] [2020-10-27 01:40:09,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:09,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:09,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:10,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:40:10,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:10,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-27 01:40:10,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:40:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:40:10,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:10,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:10,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:10,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:10,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:40:10,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:10,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:10,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752751734] [2020-10-27 01:40:10,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:10,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:40:10,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752684950] [2020-10-27 01:40:10,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:40:10,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:10,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:40:10,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:40:10,148 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-10-27 01:40:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:10,406 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-27 01:40:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:40:10,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 01:40:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:10,408 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:40:10,408 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:40:10,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:40:10,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:40:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:40:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:40:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-27 01:40:10,417 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2020-10-27 01:40:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:10,417 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-27 01:40:10,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:40:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-27 01:40:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:40:10,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:10,419 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:10,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:40:10,419 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1449180473, now seen corresponding path program 3 times [2020-10-27 01:40:10,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:10,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585242394] [2020-10-27 01:40:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:10,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:10,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:40:10,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:10,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-27 01:40:10,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:10,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:40:10,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:10,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:40:10,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:10,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:10,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:10,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:10,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:10,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:10,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:10,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:10,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:10,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:10,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:10,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585242394] [2020-10-27 01:40:10,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:10,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:40:10,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681378206] [2020-10-27 01:40:10,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:40:10,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:40:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:40:10,850 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-10-27 01:40:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:11,152 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-10-27 01:40:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:40:11,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 01:40:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:11,156 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:40:11,156 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:40:11,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:40:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:40:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:40:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:40:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-27 01:40:11,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2020-10-27 01:40:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:11,172 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-27 01:40:11,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:40:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-27 01:40:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:40:11,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:11,173 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:11,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:40:11,174 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:11,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:11,174 INFO L82 PathProgramCache]: Analyzing trace with hash 164804980, now seen corresponding path program 4 times [2020-10-27 01:40:11,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:11,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068318763] [2020-10-27 01:40:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:11,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:40:11,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:11,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-27 01:40:11,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:40:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:40:11,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:11,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:11,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:11,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:11,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:11,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:11,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:11,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:11,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:11,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:11,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:11,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068318763] [2020-10-27 01:40:11,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:11,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:40:11,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988906157] [2020-10-27 01:40:11,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:40:11,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:40:11,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:40:11,544 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 10 states. [2020-10-27 01:40:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:11,890 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-10-27 01:40:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:40:11,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:40:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:11,891 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:40:11,892 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:40:11,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:40:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:40:11,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:40:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:40:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-27 01:40:11,899 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 27 [2020-10-27 01:40:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:11,899 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-27 01:40:11,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:40:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-27 01:40:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:40:11,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:11,901 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:11,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:40:11,901 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1464429841, now seen corresponding path program 5 times [2020-10-27 01:40:11,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:11,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239308760] [2020-10-27 01:40:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:11,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:12,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:12,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:40:12,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:12,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-27 01:40:12,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:40:12,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:12,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:12,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:12,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:12,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:12,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:12,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:12,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:12,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:12,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:12,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:12,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:12,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239308760] [2020-10-27 01:40:12,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:12,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:12,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673516778] [2020-10-27 01:40:12,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:12,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:12,370 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 11 states. [2020-10-27 01:40:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:12,766 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-27 01:40:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:12,767 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:40:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:12,768 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:40:12,768 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:40:12,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:40:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-27 01:40:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:40:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 01:40:12,775 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 29 [2020-10-27 01:40:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:12,776 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 01:40:12,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 01:40:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:12,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:12,777 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:12,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:40:12,777 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:12,778 INFO L82 PathProgramCache]: Analyzing trace with hash 503970218, now seen corresponding path program 6 times [2020-10-27 01:40:12,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:12,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176700122] [2020-10-27 01:40:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:12,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:12,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:13,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:13,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:13,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:13,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 01:40:13,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:40:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:13,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:13,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:13,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:13,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:13,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:13,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:13,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:13,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:13,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:13,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176700122] [2020-10-27 01:40:13,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:13,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:40:13,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106015660] [2020-10-27 01:40:13,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:40:13,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:13,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:40:13,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:40:13,290 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 12 states. [2020-10-27 01:40:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:13,784 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-27 01:40:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:13,785 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 01:40:13,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:13,788 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:40:13,788 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:40:13,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:40:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:40:13,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-10-27 01:40:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:40:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-27 01:40:13,803 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 31 [2020-10-27 01:40:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:13,803 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-27 01:40:13,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:40:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-27 01:40:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:40:13,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:13,805 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:13,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:40:13,807 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1944150619, now seen corresponding path program 7 times [2020-10-27 01:40:13,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:13,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896725781] [2020-10-27 01:40:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:13,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:14,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:40:14,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-27 01:40:14,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:40:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:40:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:14,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:14,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:14,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:14,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:14,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:14,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:14,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:14,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:14,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:14,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:14,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896725781] [2020-10-27 01:40:14,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:14,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:40:14,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938612970] [2020-10-27 01:40:14,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:40:14,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:40:14,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:40:14,170 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 13 states. [2020-10-27 01:40:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:14,698 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-27 01:40:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:40:14,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:40:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:14,700 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:40:14,700 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:40:14,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:40:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:40:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-10-27 01:40:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:40:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-27 01:40:14,707 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 33 [2020-10-27 01:40:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:14,707 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-27 01:40:14,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:40:14,707 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-27 01:40:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:40:14,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:14,709 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:14,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:40:14,709 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:14,710 INFO L82 PathProgramCache]: Analyzing trace with hash -946196768, now seen corresponding path program 8 times [2020-10-27 01:40:14,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:14,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904370090] [2020-10-27 01:40:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:14,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:14,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:40:14,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:14,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-27 01:40:14,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:40:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:40:14,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:15,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:15,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:15,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:15,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:15,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:15,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:15,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:15,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:15,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904370090] [2020-10-27 01:40:15,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:15,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:40:15,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082237535] [2020-10-27 01:40:15,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:40:15,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:40:15,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:40:15,150 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 14 states. [2020-10-27 01:40:15,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:15,833 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-27 01:40:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:40:15,833 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:40:15,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:15,835 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:40:15,835 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:40:15,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:40:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:40:15,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-27 01:40:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:40:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-27 01:40:15,843 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 35 [2020-10-27 01:40:15,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:15,844 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-27 01:40:15,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:40:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-27 01:40:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:40:15,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:15,845 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:15,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:40:15,845 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:15,846 INFO L82 PathProgramCache]: Analyzing trace with hash 309747035, now seen corresponding path program 9 times [2020-10-27 01:40:15,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:15,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527153522] [2020-10-27 01:40:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:15,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:15,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:16,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:40:16,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:16,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-27 01:40:16,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:16,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:40:16,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:16,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:40:16,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:16,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:16,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:16,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:16,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:16,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:16,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:16,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527153522] [2020-10-27 01:40:16,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:16,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:40:16,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263410481] [2020-10-27 01:40:16,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:40:16,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:40:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:40:16,587 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 15 states. [2020-10-27 01:40:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:17,212 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-27 01:40:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:40:17,213 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 01:40:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:17,214 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:40:17,214 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 01:40:17,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:40:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 01:40:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2020-10-27 01:40:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:40:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-27 01:40:17,227 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 37 [2020-10-27 01:40:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:17,228 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-27 01:40:17,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:40:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-27 01:40:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:40:17,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:17,233 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:17,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:40:17,234 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash 385931542, now seen corresponding path program 10 times [2020-10-27 01:40:17,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:17,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543658496] [2020-10-27 01:40:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:17,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:17,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:40:17,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:17,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-27 01:40:17,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:17,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:40:17,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:17,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:40:17,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:17,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:17,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:17,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:17,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:17,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:17,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:17,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:17,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:17,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:17,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:17,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543658496] [2020-10-27 01:40:17,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:17,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:40:17,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204803535] [2020-10-27 01:40:17,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:40:17,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:17,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:40:17,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:40:17,845 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 16 states. [2020-10-27 01:40:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:18,475 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-27 01:40:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:40:18,476 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 01:40:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:18,477 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:40:18,478 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:40:18,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:40:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:40:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-10-27 01:40:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:40:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-27 01:40:18,492 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 39 [2020-10-27 01:40:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:18,492 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-27 01:40:18,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:40:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-27 01:40:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:40:18,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:18,494 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:18,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:40:18,494 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash 584798737, now seen corresponding path program 11 times [2020-10-27 01:40:18,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:18,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535829332] [2020-10-27 01:40:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:18,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:18,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:19,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:19,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:40:19,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:19,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-27 01:40:19,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:19,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:40:19,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:19,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:40:19,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:19,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:19,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:19,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:19,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:19,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:19,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 01:40:19,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:19,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:19,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:19,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:40:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:19,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535829332] [2020-10-27 01:40:19,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:19,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:40:19,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607987781] [2020-10-27 01:40:19,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:40:19,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:40:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:40:19,320 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 17 states. [2020-10-27 01:40:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:20,107 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2020-10-27 01:40:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:40:20,108 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 01:40:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:20,109 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:40:20,109 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 01:40:20,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:40:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 01:40:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2020-10-27 01:40:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:40:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-27 01:40:20,121 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 41 [2020-10-27 01:40:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:20,121 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-27 01:40:20,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:40:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-27 01:40:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:40:20,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:20,127 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:20,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:40:20,127 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:20,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1577355188, now seen corresponding path program 12 times [2020-10-27 01:40:20,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:20,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176894422] [2020-10-27 01:40:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:20,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:20,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:20,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:20,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:40:20,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:20,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-27 01:40:20,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:20,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:40:20,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:20,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:40:20,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:20,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:20,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:20,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:20,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:20,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:20,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:20,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:20,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176894422] [2020-10-27 01:40:20,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:20,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:40:20,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084612378] [2020-10-27 01:40:20,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:40:20,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:40:20,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:40:20,977 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 18 states. [2020-10-27 01:40:21,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:21,865 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-27 01:40:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:40:21,866 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-27 01:40:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:21,867 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:40:21,867 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:40:21,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:40:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:40:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-27 01:40:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:40:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-27 01:40:21,884 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 43 [2020-10-27 01:40:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:21,884 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-27 01:40:21,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:40:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-27 01:40:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:40:21,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:21,887 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:21,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:40:21,888 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:21,888 INFO L82 PathProgramCache]: Analyzing trace with hash -643105849, now seen corresponding path program 13 times [2020-10-27 01:40:21,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:21,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340414028] [2020-10-27 01:40:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:21,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:40:22,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:22,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-27 01:40:22,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:40:22,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:22,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:40:22,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:22,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:22,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:22,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:22,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:22,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340414028] [2020-10-27 01:40:22,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:22,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:40:22,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398795047] [2020-10-27 01:40:22,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:40:22,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:22,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:40:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:22,849 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 19 states. [2020-10-27 01:40:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:23,764 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2020-10-27 01:40:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:40:23,764 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-27 01:40:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:23,765 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:40:23,765 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:40:23,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=374, Invalid=816, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:40:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:40:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-10-27 01:40:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:40:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2020-10-27 01:40:23,771 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 45 [2020-10-27 01:40:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:23,772 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2020-10-27 01:40:23,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:40:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2020-10-27 01:40:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:40:23,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:23,773 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:23,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:40:23,773 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:23,773 INFO L82 PathProgramCache]: Analyzing trace with hash -477655934, now seen corresponding path program 14 times [2020-10-27 01:40:23,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:23,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398671024] [2020-10-27 01:40:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:23,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:23,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:24,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:40:24,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:24,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-27 01:40:24,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:24,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:40:24,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:24,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:40:24,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:24,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:24,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:24,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:24,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:24,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:24,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:24,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:24,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:24,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:24,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:24,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398671024] [2020-10-27 01:40:24,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:24,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:40:24,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853317152] [2020-10-27 01:40:24,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:40:24,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:40:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:24,820 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 20 states. [2020-10-27 01:40:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:25,790 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2020-10-27 01:40:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:40:25,791 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-27 01:40:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:25,792 INFO L225 Difference]: With dead ends: 107 [2020-10-27 01:40:25,792 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:40:25,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:40:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:40:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-10-27 01:40:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:40:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2020-10-27 01:40:25,807 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 47 [2020-10-27 01:40:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:25,810 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2020-10-27 01:40:25,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:40:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2020-10-27 01:40:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:40:25,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:25,811 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:25,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:40:25,811 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash -394077571, now seen corresponding path program 15 times [2020-10-27 01:40:25,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:25,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656041200] [2020-10-27 01:40:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:25,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:26,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:40:26,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:26,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-27 01:40:26,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:40:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:40:26,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:26,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:26,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:26,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:26,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:26,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:26,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:26,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:26,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656041200] [2020-10-27 01:40:26,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:26,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:40:26,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529467733] [2020-10-27 01:40:26,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:40:26,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:26,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:40:26,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:40:26,770 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 21 states. [2020-10-27 01:40:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:27,810 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2020-10-27 01:40:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:40:27,816 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-27 01:40:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:27,818 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:40:27,818 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:40:27,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=473, Invalid=1009, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:40:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:40:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2020-10-27 01:40:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:40:27,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2020-10-27 01:40:27,824 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 49 [2020-10-27 01:40:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:27,824 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2020-10-27 01:40:27,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:40:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2020-10-27 01:40:27,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:40:27,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:27,826 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:27,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:40:27,826 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1679649352, now seen corresponding path program 16 times [2020-10-27 01:40:27,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:27,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013578960] [2020-10-27 01:40:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:27,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:28,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:40:28,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:28,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-27 01:40:28,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:28,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:40:28,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:28,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:40:28,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:28,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:28,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:28,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:28,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:28,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:28,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:28,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:28,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:28,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:28,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:28,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013578960] [2020-10-27 01:40:28,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:28,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:40:28,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692990046] [2020-10-27 01:40:28,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:40:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:28,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:40:28,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:40:28,969 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand 22 states. [2020-10-27 01:40:30,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:30,058 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2020-10-27 01:40:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:40:30,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-27 01:40:30,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:30,059 INFO L225 Difference]: With dead ends: 117 [2020-10-27 01:40:30,060 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:40:30,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=527, Invalid=1113, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:40:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:40:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2020-10-27 01:40:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:40:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2020-10-27 01:40:30,069 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 51 [2020-10-27 01:40:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:30,070 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2020-10-27 01:40:30,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:40:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2020-10-27 01:40:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:40:30,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:30,071 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:30,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:40:30,071 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:30,072 INFO L82 PathProgramCache]: Analyzing trace with hash -163549645, now seen corresponding path program 17 times [2020-10-27 01:40:30,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:30,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303324371] [2020-10-27 01:40:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:30,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:30,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:40:30,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:30,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-27 01:40:30,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:30,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:40:30,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:30,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:40:30,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:31,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:31,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:31,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:31,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:31,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:31,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303324371] [2020-10-27 01:40:31,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:31,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:40:31,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204704239] [2020-10-27 01:40:31,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:40:31,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:31,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:40:31,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:40:31,126 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand 23 states. [2020-10-27 01:40:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:32,344 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2020-10-27 01:40:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:40:32,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-27 01:40:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:32,346 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:40:32,346 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:40:32,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:40:32,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:40:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2020-10-27 01:40:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:40:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2020-10-27 01:40:32,363 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 53 [2020-10-27 01:40:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:32,363 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2020-10-27 01:40:32,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:40:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2020-10-27 01:40:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:40:32,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:32,364 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:32,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:40:32,364 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:32,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:32,366 INFO L82 PathProgramCache]: Analyzing trace with hash 814355438, now seen corresponding path program 18 times [2020-10-27 01:40:32,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:32,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480254364] [2020-10-27 01:40:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:32,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:32,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:33,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:40:33,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:33,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-27 01:40:33,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:33,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:40:33,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:40:33,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:33,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:33,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:33,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:33,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:33,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:33,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:33,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:33,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480254364] [2020-10-27 01:40:33,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:33,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:40:33,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895088273] [2020-10-27 01:40:33,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:40:33,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:40:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:40:33,393 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand 24 states. [2020-10-27 01:40:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:34,641 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2020-10-27 01:40:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:40:34,641 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-27 01:40:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:34,643 INFO L225 Difference]: With dead ends: 127 [2020-10-27 01:40:34,643 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:40:34,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=644, Invalid=1336, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:40:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:40:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2020-10-27 01:40:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:40:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2020-10-27 01:40:34,650 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 55 [2020-10-27 01:40:34,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:34,650 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2020-10-27 01:40:34,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:40:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2020-10-27 01:40:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:40:34,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:34,651 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:34,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:40:34,651 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:34,652 INFO L82 PathProgramCache]: Analyzing trace with hash -16697623, now seen corresponding path program 19 times [2020-10-27 01:40:34,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:34,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948201382] [2020-10-27 01:40:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:34,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:35,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:35,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:40:35,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:35,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-27 01:40:35,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:40:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:40:35,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:36,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:36,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:36,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:36,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:36,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:36,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:36,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:36,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:36,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:36,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:36,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:36,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948201382] [2020-10-27 01:40:36,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:36,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:40:36,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374014815] [2020-10-27 01:40:36,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:40:36,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:36,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:40:36,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:40:36,048 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand 25 states. [2020-10-27 01:40:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:37,462 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2020-10-27 01:40:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:40:37,462 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-27 01:40:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:37,464 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:40:37,464 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:40:37,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:40:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:40:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2020-10-27 01:40:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:40:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2020-10-27 01:40:37,473 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 57 [2020-10-27 01:40:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:37,473 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2020-10-27 01:40:37,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:40:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2020-10-27 01:40:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:40:37,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:37,474 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:37,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:40:37,475 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:37,475 INFO L82 PathProgramCache]: Analyzing trace with hash 205227812, now seen corresponding path program 20 times [2020-10-27 01:40:37,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:37,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222051949] [2020-10-27 01:40:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:37,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:37,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:38,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:38,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:40:38,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:38,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 871 [2020-10-27 01:40:38,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:38,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:40:38,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:38,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:40:38,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:38,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:38,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:38,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:38,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:38,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:38,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:38,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:38,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:38,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:38,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222051949] [2020-10-27 01:40:38,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:38,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:40:38,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487285963] [2020-10-27 01:40:38,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:40:38,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:40:38,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:40:38,816 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand 26 states. [2020-10-27 01:40:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:40,324 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2020-10-27 01:40:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:40:40,325 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 01:40:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:40,326 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:40:40,326 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:40:40,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=773, Invalid=1579, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:40:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:40:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2020-10-27 01:40:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:40:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2020-10-27 01:40:40,334 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 59 [2020-10-27 01:40:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:40,334 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2020-10-27 01:40:40,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:40:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2020-10-27 01:40:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:40:40,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:40,341 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:40,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:40:40,341 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1272793953, now seen corresponding path program 21 times [2020-10-27 01:40:40,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:40,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759075658] [2020-10-27 01:40:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:40,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:41,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:41,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:40:41,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:41,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-27 01:40:41,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:40:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:40:41,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:41,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:41,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:41,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:41,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:41,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:41,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:41,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:41,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:41,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:40:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:41,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759075658] [2020-10-27 01:40:41,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:41,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:40:41,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924720547] [2020-10-27 01:40:41,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:40:41,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:40:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:40:41,896 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand 27 states. [2020-10-27 01:40:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:43,417 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2020-10-27 01:40:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:40:43,421 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-27 01:40:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:43,422 INFO L225 Difference]: With dead ends: 142 [2020-10-27 01:40:43,422 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 01:40:43,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=842, Invalid=1708, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:40:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 01:40:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2020-10-27 01:40:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:40:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 149 transitions. [2020-10-27 01:40:43,429 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 149 transitions. Word has length 61 [2020-10-27 01:40:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:43,430 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 149 transitions. [2020-10-27 01:40:43,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:40:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 149 transitions. [2020-10-27 01:40:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:40:43,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:43,431 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:43,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:40:43,431 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:43,432 INFO L82 PathProgramCache]: Analyzing trace with hash -17535142, now seen corresponding path program 22 times [2020-10-27 01:40:43,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:43,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18596701] [2020-10-27 01:40:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:43,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:43,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:44,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:44,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:40:44,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:44,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-27 01:40:44,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:40:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:40:44,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:44,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:44,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:44,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:44,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:44,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:44,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:44,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:44,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:44,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:44,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:44,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:44,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18596701] [2020-10-27 01:40:44,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:44,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:40:44,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297098218] [2020-10-27 01:40:44,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:40:44,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:40:44,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:40:44,978 INFO L87 Difference]: Start difference. First operand 127 states and 149 transitions. Second operand 28 states. [2020-10-27 01:40:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:46,596 INFO L93 Difference]: Finished difference Result 147 states and 171 transitions. [2020-10-27 01:40:46,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:40:46,598 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-27 01:40:46,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:46,599 INFO L225 Difference]: With dead ends: 147 [2020-10-27 01:40:46,599 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:40:46,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=914, Invalid=1842, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:40:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:40:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2020-10-27 01:40:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:40:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2020-10-27 01:40:46,605 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 63 [2020-10-27 01:40:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:46,605 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2020-10-27 01:40:46,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:40:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2020-10-27 01:40:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:40:46,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:46,606 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:46,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:40:46,606 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -599627947, now seen corresponding path program 23 times [2020-10-27 01:40:46,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:46,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739665290] [2020-10-27 01:40:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:46,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:46,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:47,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:47,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:40:47,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:47,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-27 01:40:47,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:47,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:40:47,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:47,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:40:47,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:48,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:48,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:48,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:48,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:48,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:48,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:48,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:48,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:48,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739665290] [2020-10-27 01:40:48,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:48,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:40:48,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27691591] [2020-10-27 01:40:48,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:40:48,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:48,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:40:48,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:40:48,347 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand 29 states. [2020-10-27 01:40:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:50,127 INFO L93 Difference]: Finished difference Result 152 states and 177 transitions. [2020-10-27 01:40:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:40:50,127 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-27 01:40:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:50,128 INFO L225 Difference]: With dead ends: 152 [2020-10-27 01:40:50,128 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 01:40:50,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=989, Invalid=1981, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:40:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 01:40:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2020-10-27 01:40:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:40:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2020-10-27 01:40:50,135 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 65 [2020-10-27 01:40:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:50,135 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2020-10-27 01:40:50,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:40:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2020-10-27 01:40:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:40:50,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:50,136 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:50,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:40:50,136 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:50,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1645065072, now seen corresponding path program 24 times [2020-10-27 01:40:50,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:50,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513165200] [2020-10-27 01:40:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:50,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:50,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:51,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:51,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:40:51,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:51,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 860 [2020-10-27 01:40:51,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:40:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:40:51,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:51,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:51,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:51,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:51,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:51,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:51,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:51,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:51,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:51,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:51,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:51,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:51,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513165200] [2020-10-27 01:40:51,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:51,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:40:51,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247667329] [2020-10-27 01:40:51,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:40:51,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:40:51,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:40:51,675 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand 30 states. [2020-10-27 01:40:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:53,519 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-27 01:40:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:40:53,519 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-27 01:40:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:53,521 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:40:53,521 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:40:53,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1067, Invalid=2125, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:40:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:40:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-10-27 01:40:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 01:40:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 167 transitions. [2020-10-27 01:40:53,528 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 167 transitions. Word has length 67 [2020-10-27 01:40:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:53,528 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 167 transitions. [2020-10-27 01:40:53,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:40:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 167 transitions. [2020-10-27 01:40:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:40:53,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:53,529 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:53,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:40:53,530 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:53,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1287794933, now seen corresponding path program 25 times [2020-10-27 01:40:53,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:53,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626907920] [2020-10-27 01:40:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:53,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:40:54,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:54,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 796 [2020-10-27 01:40:54,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:40:54,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:54,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:40:54,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:54,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:54,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:54,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:54,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:54,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:54,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:54,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:54,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626907920] [2020-10-27 01:40:54,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:54,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:40:54,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258697561] [2020-10-27 01:40:54,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:40:54,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:40:55,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:40:55,000 INFO L87 Difference]: Start difference. First operand 142 states and 167 transitions. Second operand 31 states. [2020-10-27 01:40:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:56,862 INFO L93 Difference]: Finished difference Result 162 states and 189 transitions. [2020-10-27 01:40:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:40:56,863 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-27 01:40:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:56,864 INFO L225 Difference]: With dead ends: 162 [2020-10-27 01:40:56,864 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 01:40:56,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1148, Invalid=2274, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:40:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 01:40:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2020-10-27 01:40:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:40:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2020-10-27 01:40:56,871 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 69 [2020-10-27 01:40:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:56,871 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2020-10-27 01:40:56,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:40:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2020-10-27 01:40:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:40:56,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:56,873 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:56,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:40:56,873 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1548575034, now seen corresponding path program 26 times [2020-10-27 01:40:56,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:56,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492840828] [2020-10-27 01:40:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:56,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:57,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:57,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:57,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:40:57,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:57,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-27 01:40:57,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:40:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:40:57,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:58,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:58,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:58,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:58,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:58,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:58,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:58,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:58,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:58,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492840828] [2020-10-27 01:40:58,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:58,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:40:58,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697299356] [2020-10-27 01:40:58,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:40:58,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:58,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:40:58,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:40:58,363 INFO L87 Difference]: Start difference. First operand 147 states and 173 transitions. Second operand 32 states. [2020-10-27 01:41:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:00,311 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2020-10-27 01:41:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:41:00,312 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-27 01:41:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:00,313 INFO L225 Difference]: With dead ends: 167 [2020-10-27 01:41:00,313 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:41:00,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1232, Invalid=2428, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:41:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:41:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2020-10-27 01:41:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 01:41:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 179 transitions. [2020-10-27 01:41:00,321 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 179 transitions. Word has length 71 [2020-10-27 01:41:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:00,321 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 179 transitions. [2020-10-27 01:41:00,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:41:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 179 transitions. [2020-10-27 01:41:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:41:00,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:00,323 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:00,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:41:00,323 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:00,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1244818369, now seen corresponding path program 27 times [2020-10-27 01:41:00,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:00,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50410914] [2020-10-27 01:41:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:00,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:00,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:01,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:01,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 01:41:01,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:01,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1220 [2020-10-27 01:41:01,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:01,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:41:01,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:01,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:41:01,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:02,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:02,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:02,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:02,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:02,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:02,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:02,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:02,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:02,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:02,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:02,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50410914] [2020-10-27 01:41:02,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:02,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:41:02,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843525655] [2020-10-27 01:41:02,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:41:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:41:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:41:02,268 INFO L87 Difference]: Start difference. First operand 152 states and 179 transitions. Second operand 33 states. [2020-10-27 01:41:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:04,327 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2020-10-27 01:41:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:41:04,328 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-27 01:41:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:04,329 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:41:04,329 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 01:41:04,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1319, Invalid=2587, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:41:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 01:41:04,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2020-10-27 01:41:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 01:41:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-10-27 01:41:04,337 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 73 [2020-10-27 01:41:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:04,337 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-10-27 01:41:04,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:41:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-10-27 01:41:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 01:41:04,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:04,339 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:04,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:41:04,339 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:04,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1341318652, now seen corresponding path program 28 times [2020-10-27 01:41:04,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:04,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202333889] [2020-10-27 01:41:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:04,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:05,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:41:05,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:05,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1156 [2020-10-27 01:41:05,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:41:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:41:05,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:06,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:06,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:06,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:06,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:06,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:06,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:06,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:06,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:06,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:06,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:06,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:06,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202333889] [2020-10-27 01:41:06,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:06,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:41:06,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683386791] [2020-10-27 01:41:06,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:41:06,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:06,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:41:06,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:41:06,308 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 34 states. [2020-10-27 01:41:08,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:08,469 INFO L93 Difference]: Finished difference Result 177 states and 207 transitions. [2020-10-27 01:41:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:41:08,470 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-27 01:41:08,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:08,471 INFO L225 Difference]: With dead ends: 177 [2020-10-27 01:41:08,471 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:41:08,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:41:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:41:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2020-10-27 01:41:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 01:41:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 191 transitions. [2020-10-27 01:41:08,481 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 191 transitions. Word has length 75 [2020-10-27 01:41:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:08,481 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 191 transitions. [2020-10-27 01:41:08,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:41:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 191 transitions. [2020-10-27 01:41:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:41:08,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:08,482 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:08,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:41:08,483 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:08,484 INFO L82 PathProgramCache]: Analyzing trace with hash -411189897, now seen corresponding path program 29 times [2020-10-27 01:41:08,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:08,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332358526] [2020-10-27 01:41:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:10,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 01:41:10,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:10,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1736 [2020-10-27 01:41:10,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:41:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:41:10,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:11,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:11,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:11,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:11,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:11,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:11,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:11,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332358526] [2020-10-27 01:41:11,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:11,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:41:11,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421361646] [2020-10-27 01:41:11,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:41:11,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:41:11,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:41:11,146 INFO L87 Difference]: Start difference. First operand 162 states and 191 transitions. Second operand 35 states. [2020-10-27 01:41:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:13,406 INFO L93 Difference]: Finished difference Result 182 states and 213 transitions. [2020-10-27 01:41:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:41:13,406 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-27 01:41:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:13,408 INFO L225 Difference]: With dead ends: 182 [2020-10-27 01:41:13,408 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 01:41:13,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1502, Invalid=2920, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:41:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 01:41:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2020-10-27 01:41:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:41:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 197 transitions. [2020-10-27 01:41:13,415 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 197 transitions. Word has length 77 [2020-10-27 01:41:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:13,416 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 197 transitions. [2020-10-27 01:41:13,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:41:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 197 transitions. [2020-10-27 01:41:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 01:41:13,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:13,417 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:13,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:41:13,417 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -944725454, now seen corresponding path program 30 times [2020-10-27 01:41:13,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:13,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033123607] [2020-10-27 01:41:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:13,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:14,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:14,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 01:41:14,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:14,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1538 [2020-10-27 01:41:14,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:41:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:41:14,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:15,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:15,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:15,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:15,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:15,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:15,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:15,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:15,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:15,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:15,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:15,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033123607] [2020-10-27 01:41:15,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:15,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:41:15,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813604852] [2020-10-27 01:41:15,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:41:15,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:15,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:41:15,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:41:15,801 INFO L87 Difference]: Start difference. First operand 167 states and 197 transitions. Second operand 36 states. [2020-10-27 01:41:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:18,197 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2020-10-27 01:41:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:41:18,200 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-27 01:41:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:18,202 INFO L225 Difference]: With dead ends: 187 [2020-10-27 01:41:18,202 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 01:41:18,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1598, Invalid=3094, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:41:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 01:41:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2020-10-27 01:41:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 01:41:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 203 transitions. [2020-10-27 01:41:18,209 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 203 transitions. Word has length 79 [2020-10-27 01:41:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:18,210 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 203 transitions. [2020-10-27 01:41:18,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:41:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 203 transitions. [2020-10-27 01:41:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:41:18,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:18,211 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:18,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:41:18,212 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:18,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1723679789, now seen corresponding path program 31 times [2020-10-27 01:41:18,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:18,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059649306] [2020-10-27 01:41:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:18,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:19,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:19,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:41:19,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:19,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1231 [2020-10-27 01:41:19,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:19,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:41:19,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:19,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:41:19,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:20,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:20,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:20,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:20,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:20,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059649306] [2020-10-27 01:41:20,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:20,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:41:20,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322666077] [2020-10-27 01:41:20,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:41:20,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:41:20,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:41:20,427 INFO L87 Difference]: Start difference. First operand 172 states and 203 transitions. Second operand 37 states. [2020-10-27 01:41:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:23,024 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2020-10-27 01:41:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:41:23,026 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-27 01:41:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:23,027 INFO L225 Difference]: With dead ends: 192 [2020-10-27 01:41:23,028 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 01:41:23,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1697, Invalid=3273, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:41:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 01:41:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 177. [2020-10-27 01:41:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 01:41:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 209 transitions. [2020-10-27 01:41:23,034 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 209 transitions. Word has length 81 [2020-10-27 01:41:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:23,034 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 209 transitions. [2020-10-27 01:41:23,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:41:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 209 transitions. [2020-10-27 01:41:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 01:41:23,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:23,035 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:23,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:41:23,036 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1965642600, now seen corresponding path program 32 times [2020-10-27 01:41:23,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:23,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11344737] [2020-10-27 01:41:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:23,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:24,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 01:41:24,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:24,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-27 01:41:24,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:41:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:41:24,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:25,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:25,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:25,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:25,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:25,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:25,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:25,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11344737] [2020-10-27 01:41:25,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:25,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:41:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636331139] [2020-10-27 01:41:25,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:41:25,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:41:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:41:25,665 INFO L87 Difference]: Start difference. First operand 177 states and 209 transitions. Second operand 38 states. [2020-10-27 01:41:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:28,265 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2020-10-27 01:41:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:41:28,266 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-27 01:41:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:28,267 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:41:28,267 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 01:41:28,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1799, Invalid=3457, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:41:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 01:41:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 182. [2020-10-27 01:41:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 01:41:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 215 transitions. [2020-10-27 01:41:28,275 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 215 transitions. Word has length 83 [2020-10-27 01:41:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:28,276 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 215 transitions. [2020-10-27 01:41:28,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:41:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 215 transitions. [2020-10-27 01:41:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 01:41:28,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:28,277 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:28,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:41:28,277 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:28,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1731297309, now seen corresponding path program 33 times [2020-10-27 01:41:28,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:28,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894064974] [2020-10-27 01:41:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:28,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:28,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:29,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 01:41:29,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:29,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-27 01:41:29,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:29,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:41:29,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:29,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:41:29,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:30,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:30,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:30,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:30,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:30,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:30,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:30,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:30,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:30,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894064974] [2020-10-27 01:41:30,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:30,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:41:30,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238112245] [2020-10-27 01:41:30,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:41:30,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:30,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:41:30,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:41:30,431 INFO L87 Difference]: Start difference. First operand 182 states and 215 transitions. Second operand 39 states. [2020-10-27 01:41:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:33,088 INFO L93 Difference]: Finished difference Result 202 states and 237 transitions. [2020-10-27 01:41:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:41:33,089 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-27 01:41:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:33,091 INFO L225 Difference]: With dead ends: 202 [2020-10-27 01:41:33,091 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 01:41:33,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1904, Invalid=3646, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:41:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 01:41:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2020-10-27 01:41:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 01:41:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 221 transitions. [2020-10-27 01:41:33,098 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 221 transitions. Word has length 85 [2020-10-27 01:41:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:33,098 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 221 transitions. [2020-10-27 01:41:33,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:41:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 221 transitions. [2020-10-27 01:41:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 01:41:33,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:33,100 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:33,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:41:33,100 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:33,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1742371230, now seen corresponding path program 34 times [2020-10-27 01:41:33,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:33,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209977019] [2020-10-27 01:41:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:33,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:33,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:34,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 01:41:34,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:34,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1652 [2020-10-27 01:41:34,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:34,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:41:34,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:34,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:41:34,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:35,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:35,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:35,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:35,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:35,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:35,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:35,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:35,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:35,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209977019] [2020-10-27 01:41:35,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:35,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:41:35,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475454338] [2020-10-27 01:41:35,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:41:35,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:41:35,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:41:35,941 INFO L87 Difference]: Start difference. First operand 187 states and 221 transitions. Second operand 40 states. [2020-10-27 01:41:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:38,910 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2020-10-27 01:41:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:41:38,911 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2020-10-27 01:41:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:38,913 INFO L225 Difference]: With dead ends: 207 [2020-10-27 01:41:38,913 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 01:41:38,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2012, Invalid=3840, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:41:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 01:41:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 192. [2020-10-27 01:41:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 01:41:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 227 transitions. [2020-10-27 01:41:38,918 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 227 transitions. Word has length 87 [2020-10-27 01:41:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:38,919 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 227 transitions. [2020-10-27 01:41:38,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:41:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 227 transitions. [2020-10-27 01:41:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 01:41:38,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:38,920 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:38,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:41:38,920 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:38,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1546719079, now seen corresponding path program 35 times [2020-10-27 01:41:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:38,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200861157] [2020-10-27 01:41:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:38,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:39,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:40,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:40,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 01:41:40,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:40,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1702 [2020-10-27 01:41:40,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:40,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:41:40,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:40,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:41:40,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:41,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:41,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:41,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:41,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:41,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:41,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:41,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:41,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:41,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:41,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:41,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200861157] [2020-10-27 01:41:41,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:41,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:41:41,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102683485] [2020-10-27 01:41:41,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:41:41,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:41:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:41:41,775 INFO L87 Difference]: Start difference. First operand 192 states and 227 transitions. Second operand 41 states. [2020-10-27 01:41:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:44,843 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2020-10-27 01:41:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:41:44,844 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2020-10-27 01:41:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:44,846 INFO L225 Difference]: With dead ends: 212 [2020-10-27 01:41:44,846 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 01:41:44,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2123, Invalid=4039, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:41:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 01:41:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 197. [2020-10-27 01:41:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 01:41:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 233 transitions. [2020-10-27 01:41:44,853 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 233 transitions. Word has length 89 [2020-10-27 01:41:44,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:44,854 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 233 transitions. [2020-10-27 01:41:44,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:41:44,854 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 233 transitions. [2020-10-27 01:41:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 01:41:44,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:44,855 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:44,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:41:44,855 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:44,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1266576172, now seen corresponding path program 36 times [2020-10-27 01:41:44,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:44,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433465260] [2020-10-27 01:41:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:44,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:46,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:46,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 01:41:46,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:46,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-10-27 01:41:46,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:46,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:41:46,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:46,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 01:41:46,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:47,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:47,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:47,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:47,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:47,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:47,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:47,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:47,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433465260] [2020-10-27 01:41:47,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:47,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:41:47,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129727868] [2020-10-27 01:41:47,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:41:47,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:47,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:41:47,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:41:47,300 INFO L87 Difference]: Start difference. First operand 197 states and 233 transitions. Second operand 42 states. [2020-10-27 01:41:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:50,573 INFO L93 Difference]: Finished difference Result 217 states and 255 transitions. [2020-10-27 01:41:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:41:50,574 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 91 [2020-10-27 01:41:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:50,576 INFO L225 Difference]: With dead ends: 217 [2020-10-27 01:41:50,576 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 01:41:50,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2237, Invalid=4243, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:41:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 01:41:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2020-10-27 01:41:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-27 01:41:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 239 transitions. [2020-10-27 01:41:50,583 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 239 transitions. Word has length 91 [2020-10-27 01:41:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:50,583 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 239 transitions. [2020-10-27 01:41:50,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:41:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 239 transitions. [2020-10-27 01:41:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 01:41:50,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:50,584 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:50,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:41:50,585 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1662785103, now seen corresponding path program 37 times [2020-10-27 01:41:50,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:50,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300902944] [2020-10-27 01:41:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:50,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:51,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:51,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:51,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 01:41:51,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:51,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-27 01:41:51,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:41:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 01:41:51,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:52,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:52,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:52,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:52,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:52,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:52,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:52,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:52,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300902944] [2020-10-27 01:41:52,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:52,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:41:52,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529786315] [2020-10-27 01:41:52,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:41:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:41:52,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:41:52,896 INFO L87 Difference]: Start difference. First operand 202 states and 239 transitions. Second operand 43 states. [2020-10-27 01:41:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:56,282 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2020-10-27 01:41:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:41:56,283 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2020-10-27 01:41:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:56,284 INFO L225 Difference]: With dead ends: 222 [2020-10-27 01:41:56,284 INFO L226 Difference]: Without dead ends: 214 [2020-10-27 01:41:56,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2354, Invalid=4452, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:41:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-27 01:41:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2020-10-27 01:41:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 01:41:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 245 transitions. [2020-10-27 01:41:56,292 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 245 transitions. Word has length 93 [2020-10-27 01:41:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:56,292 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 245 transitions. [2020-10-27 01:41:56,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:41:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 245 transitions. [2020-10-27 01:41:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 01:41:56,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:56,294 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:56,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:41:56,294 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:56,295 INFO L82 PathProgramCache]: Analyzing trace with hash -719575798, now seen corresponding path program 38 times [2020-10-27 01:41:56,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:56,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727751646] [2020-10-27 01:41:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:57,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 01:41:57,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:57,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1612 [2020-10-27 01:41:57,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:41:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 01:41:57,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:59,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:59,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:59,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:59,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:59,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:59,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:59,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:59,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:59,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:59,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727751646] [2020-10-27 01:41:59,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:59,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:41:59,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632795881] [2020-10-27 01:41:59,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:41:59,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:59,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:41:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:41:59,302 INFO L87 Difference]: Start difference. First operand 207 states and 245 transitions. Second operand 44 states. [2020-10-27 01:42:02,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:02,799 INFO L93 Difference]: Finished difference Result 227 states and 267 transitions. [2020-10-27 01:42:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:42:02,799 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 95 [2020-10-27 01:42:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:02,802 INFO L225 Difference]: With dead ends: 227 [2020-10-27 01:42:02,802 INFO L226 Difference]: Without dead ends: 219 [2020-10-27 01:42:02,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2474, Invalid=4666, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:42:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-27 01:42:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2020-10-27 01:42:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-27 01:42:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 251 transitions. [2020-10-27 01:42:02,810 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 251 transitions. Word has length 95 [2020-10-27 01:42:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:02,810 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 251 transitions. [2020-10-27 01:42:02,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:42:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 251 transitions. [2020-10-27 01:42:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 01:42:02,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:02,811 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:02,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:42:02,812 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:02,812 INFO L82 PathProgramCache]: Analyzing trace with hash -950832891, now seen corresponding path program 39 times [2020-10-27 01:42:02,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:02,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852001610] [2020-10-27 01:42:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:02,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:04,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:04,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 01:42:04,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:04,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1397 [2020-10-27 01:42:04,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:42:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:42:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 01:42:04,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:05,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:05,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:05,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:05,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:05,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:05,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:05,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:05,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852001610] [2020-10-27 01:42:05,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:05,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:42:05,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241639955] [2020-10-27 01:42:05,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:42:05,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:05,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:42:05,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:42:05,683 INFO L87 Difference]: Start difference. First operand 212 states and 251 transitions. Second operand 45 states. [2020-10-27 01:42:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:09,380 INFO L93 Difference]: Finished difference Result 232 states and 273 transitions. [2020-10-27 01:42:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:42:09,381 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2020-10-27 01:42:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:09,383 INFO L225 Difference]: With dead ends: 232 [2020-10-27 01:42:09,383 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 01:42:09,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2597, Invalid=4885, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:42:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 01:42:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2020-10-27 01:42:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 01:42:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 257 transitions. [2020-10-27 01:42:09,390 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 257 transitions. Word has length 97 [2020-10-27 01:42:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:09,390 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 257 transitions. [2020-10-27 01:42:09,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:42:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 257 transitions. [2020-10-27 01:42:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 01:42:09,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:09,391 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:09,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:42:09,392 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:09,392 INFO L82 PathProgramCache]: Analyzing trace with hash 149400128, now seen corresponding path program 40 times [2020-10-27 01:42:09,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:09,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012066063] [2020-10-27 01:42:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:09,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:11,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:11,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:42:11,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:11,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-10-27 01:42:11,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:11,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:42:11,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:42:11,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 01:42:11,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:13,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:13,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:13,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:13,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:13,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:13,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:13,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012066063] [2020-10-27 01:42:13,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:13,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:42:13,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416353663] [2020-10-27 01:42:13,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:42:13,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:13,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:42:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:42:13,074 INFO L87 Difference]: Start difference. First operand 217 states and 257 transitions. Second operand 46 states. [2020-10-27 01:42:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:16,945 INFO L93 Difference]: Finished difference Result 237 states and 279 transitions. [2020-10-27 01:42:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:42:16,945 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 99 [2020-10-27 01:42:16,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:16,948 INFO L225 Difference]: With dead ends: 237 [2020-10-27 01:42:16,948 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 01:42:16,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2723, Invalid=5109, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:42:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 01:42:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 222. [2020-10-27 01:42:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 01:42:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2020-10-27 01:42:16,955 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 99 [2020-10-27 01:42:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:16,956 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2020-10-27 01:42:16,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:42:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2020-10-27 01:42:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 01:42:16,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:16,957 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:16,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:42:16,957 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:16,958 INFO L82 PathProgramCache]: Analyzing trace with hash 911376571, now seen corresponding path program 41 times [2020-10-27 01:42:16,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:16,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062291637] [2020-10-27 01:42:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:16,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:17,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:20,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 01:42:20,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:20,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3071 [2020-10-27 01:42:20,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:42:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:42:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 01:42:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:21,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:21,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:21,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:21,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:21,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:21,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:21,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062291637] [2020-10-27 01:42:21,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:21,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:42:21,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431758650] [2020-10-27 01:42:21,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:42:21,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:21,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:42:21,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:42:21,614 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand 47 states. [2020-10-27 01:42:25,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:25,565 INFO L93 Difference]: Finished difference Result 242 states and 285 transitions. [2020-10-27 01:42:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:42:25,566 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2020-10-27 01:42:25,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:25,568 INFO L225 Difference]: With dead ends: 242 [2020-10-27 01:42:25,569 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 01:42:25,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2852, Invalid=5338, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:42:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 01:42:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2020-10-27 01:42:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 01:42:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2020-10-27 01:42:25,574 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 101 [2020-10-27 01:42:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:25,575 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2020-10-27 01:42:25,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:42:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2020-10-27 01:42:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 01:42:25,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:25,576 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:25,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:42:25,576 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1268669322, now seen corresponding path program 42 times [2020-10-27 01:42:25,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:25,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562619679] [2020-10-27 01:42:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:25,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:27,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:27,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 01:42:27,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:27,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2357 [2020-10-27 01:42:27,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:27,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:42:27,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:42:27,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 01:42:27,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:29,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:29,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:29,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:29,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:29,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:29,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:29,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:29,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:29,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562619679] [2020-10-27 01:42:29,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:29,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:42:29,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615879939] [2020-10-27 01:42:29,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:42:29,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:42:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:42:29,590 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand 48 states. [2020-10-27 01:42:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:33,710 INFO L93 Difference]: Finished difference Result 247 states and 291 transitions. [2020-10-27 01:42:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:42:33,710 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 103 [2020-10-27 01:42:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:33,713 INFO L225 Difference]: With dead ends: 247 [2020-10-27 01:42:33,713 INFO L226 Difference]: Without dead ends: 239 [2020-10-27 01:42:33,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2984, Invalid=5572, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:42:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-27 01:42:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2020-10-27 01:42:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 01:42:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 275 transitions. [2020-10-27 01:42:33,721 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 275 transitions. Word has length 103 [2020-10-27 01:42:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:33,721 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 275 transitions. [2020-10-27 01:42:33,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:42:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 275 transitions. [2020-10-27 01:42:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 01:42:33,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:33,722 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:33,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:42:33,723 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:33,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:33,723 INFO L82 PathProgramCache]: Analyzing trace with hash -348732047, now seen corresponding path program 43 times [2020-10-27 01:42:33,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:33,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262493623] [2020-10-27 01:42:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:33,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:34,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:36,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 01:42:36,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:36,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2402 [2020-10-27 01:42:36,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:42:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:42:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 01:42:36,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:37,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:37,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:37,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:37,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:37,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:37,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:37,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:37,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:37,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262493623] [2020-10-27 01:42:37,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:37,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:42:37,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126326667] [2020-10-27 01:42:37,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:42:37,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:37,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:42:37,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:42:37,857 INFO L87 Difference]: Start difference. First operand 232 states and 275 transitions. Second operand 49 states. [2020-10-27 01:42:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:42,016 INFO L93 Difference]: Finished difference Result 252 states and 297 transitions. [2020-10-27 01:42:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:42:42,016 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2020-10-27 01:42:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:42,018 INFO L225 Difference]: With dead ends: 252 [2020-10-27 01:42:42,018 INFO L226 Difference]: Without dead ends: 244 [2020-10-27 01:42:42,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3119, Invalid=5811, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:42:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-27 01:42:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 237. [2020-10-27 01:42:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 01:42:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 281 transitions. [2020-10-27 01:42:42,024 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 281 transitions. Word has length 105 [2020-10-27 01:42:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:42,025 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 281 transitions. [2020-10-27 01:42:42,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:42:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 281 transitions. [2020-10-27 01:42:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 01:42:42,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:42,026 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:42,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:42:42,026 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1052273748, now seen corresponding path program 44 times [2020-10-27 01:42:42,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:42,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019767792] [2020-10-27 01:42:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:42,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:42,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:44,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:44,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 01:42:44,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2425 [2020-10-27 01:42:44,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:42:44,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:42:44,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 01:42:44,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:46,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:46,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:46,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:46,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:46,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:46,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:46,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:46,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:46,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019767792] [2020-10-27 01:42:46,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:46,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:42:46,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053138775] [2020-10-27 01:42:46,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:42:46,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:46,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:42:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:42:46,280 INFO L87 Difference]: Start difference. First operand 237 states and 281 transitions. Second operand 50 states. [2020-10-27 01:42:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:50,538 INFO L93 Difference]: Finished difference Result 257 states and 303 transitions. [2020-10-27 01:42:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:42:50,539 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2020-10-27 01:42:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:50,540 INFO L225 Difference]: With dead ends: 257 [2020-10-27 01:42:50,540 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 01:42:50,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3257, Invalid=6055, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:42:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 01:42:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2020-10-27 01:42:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-27 01:42:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 287 transitions. [2020-10-27 01:42:50,547 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 287 transitions. Word has length 107 [2020-10-27 01:42:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:50,547 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 287 transitions. [2020-10-27 01:42:50,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:42:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 287 transitions. [2020-10-27 01:42:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 01:42:50,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:50,548 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:50,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:42:50,549 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:50,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1448984359, now seen corresponding path program 45 times [2020-10-27 01:42:50,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:50,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821324208] [2020-10-27 01:42:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:50,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:53,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 01:42:53,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2500 [2020-10-27 01:42:53,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:42:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:42:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 01:42:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:54,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:54,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:54,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:54,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:54,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:54,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:54,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:54,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:54,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:54,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:54,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:54,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821324208] [2020-10-27 01:42:54,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:54,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:42:54,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568407748] [2020-10-27 01:42:54,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:42:54,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:54,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:42:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:42:54,949 INFO L87 Difference]: Start difference. First operand 242 states and 287 transitions. Second operand 51 states. [2020-10-27 01:42:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:59,433 INFO L93 Difference]: Finished difference Result 262 states and 309 transitions. [2020-10-27 01:42:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:42:59,434 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2020-10-27 01:42:59,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:59,436 INFO L225 Difference]: With dead ends: 262 [2020-10-27 01:42:59,436 INFO L226 Difference]: Without dead ends: 254 [2020-10-27 01:42:59,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3398, Invalid=6304, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 01:42:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-27 01:42:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2020-10-27 01:42:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 01:42:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 293 transitions. [2020-10-27 01:42:59,443 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 293 transitions. Word has length 109 [2020-10-27 01:42:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:59,443 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 293 transitions. [2020-10-27 01:42:59,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:42:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 293 transitions. [2020-10-27 01:42:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 01:42:59,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:59,444 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:59,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:42:59,444 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash -23660574, now seen corresponding path program 46 times [2020-10-27 01:42:59,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:59,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083221026] [2020-10-27 01:42:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:59,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:59,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:02,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 01:43:02,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:02,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3098 [2020-10-27 01:43:02,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:43:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:43:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 01:43:02,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:04,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:04,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:04,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:04,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:04,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:04,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:04,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:04,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:04,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083221026] [2020-10-27 01:43:04,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:04,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:43:04,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362358017] [2020-10-27 01:43:04,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:43:04,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:04,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:43:04,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:43:04,517 INFO L87 Difference]: Start difference. First operand 247 states and 293 transitions. Second operand 52 states. [2020-10-27 01:43:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:09,108 INFO L93 Difference]: Finished difference Result 267 states and 315 transitions. [2020-10-27 01:43:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:43:09,109 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 111 [2020-10-27 01:43:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:09,110 INFO L225 Difference]: With dead ends: 267 [2020-10-27 01:43:09,111 INFO L226 Difference]: Without dead ends: 259 [2020-10-27 01:43:09,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3542, Invalid=6558, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 01:43:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-27 01:43:09,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2020-10-27 01:43:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 01:43:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 299 transitions. [2020-10-27 01:43:09,117 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 299 transitions. Word has length 111 [2020-10-27 01:43:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:09,117 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 299 transitions. [2020-10-27 01:43:09,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:43:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 299 transitions. [2020-10-27 01:43:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 01:43:09,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:09,119 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:09,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:43:09,119 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2103766493, now seen corresponding path program 47 times [2020-10-27 01:43:09,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:09,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625854094] [2020-10-27 01:43:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:09,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:09,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:12,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:12,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 01:43:12,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:12,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3249 [2020-10-27 01:43:12,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:43:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:43:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 01:43:12,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:14,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:14,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:14,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:14,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:14,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:14,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:14,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:14,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:14,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:14,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:14,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:14,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625854094] [2020-10-27 01:43:14,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:14,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:43:14,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396883426] [2020-10-27 01:43:14,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:43:14,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:43:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:43:14,436 INFO L87 Difference]: Start difference. First operand 252 states and 299 transitions. Second operand 53 states. [2020-10-27 01:43:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:19,029 INFO L93 Difference]: Finished difference Result 272 states and 321 transitions. [2020-10-27 01:43:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:43:19,030 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2020-10-27 01:43:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:19,032 INFO L225 Difference]: With dead ends: 272 [2020-10-27 01:43:19,032 INFO L226 Difference]: Without dead ends: 264 [2020-10-27 01:43:19,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3689, Invalid=6817, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 01:43:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-27 01:43:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2020-10-27 01:43:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-27 01:43:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 305 transitions. [2020-10-27 01:43:19,039 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 305 transitions. Word has length 113 [2020-10-27 01:43:19,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:19,039 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 305 transitions. [2020-10-27 01:43:19,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:43:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 305 transitions. [2020-10-27 01:43:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 01:43:19,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:19,041 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:19,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:43:19,041 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2138222312, now seen corresponding path program 48 times [2020-10-27 01:43:19,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:19,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940324568] [2020-10-27 01:43:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:19,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:19,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:22,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 01:43:22,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:22,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3035 [2020-10-27 01:43:22,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:22,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 01:43:22,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:43:22,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 01:43:22,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:24,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:24,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:24,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:24,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:24,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:24,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:24,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:24,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:24,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940324568] [2020-10-27 01:43:24,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:24,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 01:43:24,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291367664] [2020-10-27 01:43:24,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 01:43:24,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:24,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 01:43:24,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:43:24,227 INFO L87 Difference]: Start difference. First operand 257 states and 305 transitions. Second operand 54 states. [2020-10-27 01:43:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:29,181 INFO L93 Difference]: Finished difference Result 277 states and 327 transitions. [2020-10-27 01:43:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 01:43:29,181 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 115 [2020-10-27 01:43:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:29,183 INFO L225 Difference]: With dead ends: 277 [2020-10-27 01:43:29,183 INFO L226 Difference]: Without dead ends: 269 [2020-10-27 01:43:29,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3839, Invalid=7081, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 01:43:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-27 01:43:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2020-10-27 01:43:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 01:43:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 311 transitions. [2020-10-27 01:43:29,190 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 311 transitions. Word has length 115 [2020-10-27 01:43:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:29,190 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 311 transitions. [2020-10-27 01:43:29,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 01:43:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 311 transitions. [2020-10-27 01:43:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 01:43:29,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:29,191 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:29,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:43:29,191 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:29,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1529467283, now seen corresponding path program 49 times [2020-10-27 01:43:29,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:29,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430177228] [2020-10-27 01:43:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:29,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:29,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:32,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 01:43:32,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:32,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3739 [2020-10-27 01:43:32,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:32,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 01:43:32,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:43:32,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 01:43:32,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:35,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:35,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:35,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:35,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:35,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:35,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:35,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:35,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:35,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430177228] [2020-10-27 01:43:35,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:35,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 01:43:35,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501650587] [2020-10-27 01:43:35,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 01:43:35,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:35,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 01:43:35,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1638, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:43:35,170 INFO L87 Difference]: Start difference. First operand 262 states and 311 transitions. Second operand 55 states. [2020-10-27 01:43:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:40,242 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2020-10-27 01:43:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 01:43:40,243 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2020-10-27 01:43:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:40,245 INFO L225 Difference]: With dead ends: 282 [2020-10-27 01:43:40,245 INFO L226 Difference]: Without dead ends: 274 [2020-10-27 01:43:40,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3992, Invalid=7350, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 01:43:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-27 01:43:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2020-10-27 01:43:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-27 01:43:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 317 transitions. [2020-10-27 01:43:40,252 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 317 transitions. Word has length 117 [2020-10-27 01:43:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:40,252 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 317 transitions. [2020-10-27 01:43:40,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 01:43:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 317 transitions. [2020-10-27 01:43:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 01:43:40,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:40,253 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:40,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:43:40,254 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash 11018062, now seen corresponding path program 50 times [2020-10-27 01:43:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:40,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172626814] [2020-10-27 01:43:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:43,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:43,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 01:43:43,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:43,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2869 [2020-10-27 01:43:43,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:43,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 01:43:43,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:43:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 01:43:43,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:45,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:45,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:45,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:45,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:45,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:45,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:45,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:45,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:45,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172626814] [2020-10-27 01:43:45,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:45,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 01:43:45,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895930214] [2020-10-27 01:43:45,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 01:43:45,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 01:43:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 01:43:45,487 INFO L87 Difference]: Start difference. First operand 267 states and 317 transitions. Second operand 56 states. [2020-10-27 01:43:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:50,630 INFO L93 Difference]: Finished difference Result 287 states and 339 transitions. [2020-10-27 01:43:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 01:43:50,631 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 119 [2020-10-27 01:43:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:50,633 INFO L225 Difference]: With dead ends: 287 [2020-10-27 01:43:50,633 INFO L226 Difference]: Without dead ends: 279 [2020-10-27 01:43:50,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4148, Invalid=7624, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 01:43:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-27 01:43:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 272. [2020-10-27 01:43:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 01:43:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 323 transitions. [2020-10-27 01:43:50,640 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 323 transitions. Word has length 119 [2020-10-27 01:43:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:50,640 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 323 transitions. [2020-10-27 01:43:50,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 01:43:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 323 transitions. [2020-10-27 01:43:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 01:43:50,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:50,641 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:50,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:43:50,642 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:50,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:50,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1070197321, now seen corresponding path program 51 times [2020-10-27 01:43:50,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:50,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388654219] [2020-10-27 01:43:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:50,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:51,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:53,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:53,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 01:43:53,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:53,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2812 [2020-10-27 01:43:53,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 01:43:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:43:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 01:43:53,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0