/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:51:47,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:51:47,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:51:47,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:51:47,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:51:47,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:51:47,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:51:47,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:51:47,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:51:47,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:51:47,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:51:47,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:51:47,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:51:47,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:51:47,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:51:47,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:51:47,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:51:47,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:51:47,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:51:47,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:51:47,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:51:47,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:51:47,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:51:47,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:51:47,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:51:47,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:51:47,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:51:47,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:51:47,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:51:47,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:51:47,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:51:47,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:51:47,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:51:47,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:51:47,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:51:47,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:51:47,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:51:47,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:51:47,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:51:47,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:51:47,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:51:47,408 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 [2020-10-12 09:51:47,457 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:51:47,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:51:47,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:51:47,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:51:47,460 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:51:47,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:51:47,461 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:51:47,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:51:47,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:51:47,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:51:47,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:51:47,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:51:47,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:51:47,462 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:51:47,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:51:47,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:51:47,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:51:47,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:51:47,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:51:47,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:51:47,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:51:47,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:47,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:51:47,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:51:47,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:51:47,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:51:47,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:51:47,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:51:47,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:51:47,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:51:47,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:51:47,774 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:51:47,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:51:47,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:51:47,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:51:47,780 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2020-10-12 09:51:47,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/268e76066/eb066952b94c41628ebe3f0df6a5f5b2/FLAG421b225c8 [2020-10-12 09:51:48,264 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:51:48,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2020-10-12 09:51:48,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/268e76066/eb066952b94c41628ebe3f0df6a5f5b2/FLAG421b225c8 [2020-10-12 09:51:48,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/268e76066/eb066952b94c41628ebe3f0df6a5f5b2 [2020-10-12 09:51:48,627 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:51:48,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:51:48,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:48,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:51:48,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:51:48,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:48" (1/1) ... [2020-10-12 09:51:48,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729acd32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48, skipping insertion in model container [2020-10-12 09:51:48,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:48" (1/1) ... [2020-10-12 09:51:48,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:51:48,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:51:48,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:48,843 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:51:48,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:48,893 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:51:48,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48 WrapperNode [2020-10-12 09:51:48,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:48,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:51:48,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:51:48,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:51:48,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48" (1/1) ... [2020-10-12 09:51:48,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48" (1/1) ... [2020-10-12 09:51:49,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48" (1/1) ... [2020-10-12 09:51:49,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48" (1/1) ... [2020-10-12 09:51:49,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48" (1/1) ... [2020-10-12 09:51:49,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48" (1/1) ... [2020-10-12 09:51:49,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48" (1/1) ... [2020-10-12 09:51:49,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:51:49,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:51:49,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:51:49,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:51:49,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48" (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 [2020-10-12 09:51:49,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:51:49,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:51:49,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:51:49,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:51:49,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:51:49,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:51:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:51:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:51:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:51:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:51:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:51:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:51:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:51:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:51:49,475 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:51:49,475 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-12 09:51:49,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:49 BoogieIcfgContainer [2020-10-12 09:51:49,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:51:49,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:51:49,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:51:49,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:51:49,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:51:48" (1/3) ... [2020-10-12 09:51:49,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2cb5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:49, skipping insertion in model container [2020-10-12 09:51:49,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:48" (2/3) ... [2020-10-12 09:51:49,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2cb5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:49, skipping insertion in model container [2020-10-12 09:51:49,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:49" (3/3) ... [2020-10-12 09:51:49,492 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2020-10-12 09:51:49,505 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:51:49,513 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:51:49,530 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:51:49,558 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:51:49,558 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:51:49,559 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:51:49,559 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:51:49,559 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:51:49,559 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:51:49,559 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:51:49,560 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:51:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-12 09:51:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:51:49,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:49,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:49,592 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:49,598 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2020-10-12 09:51:49,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:49,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913265205] [2020-10-12 09:51:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:49,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:52,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:51:52,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 09:51:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3157 [2020-10-12 09:51:52,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:52,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:52,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 09:51:52,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:51:52,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:51:52,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:52,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:52,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:52,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:52,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:51:52,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:52,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:52,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:52,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:52,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:52,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913265205] [2020-10-12 09:51:52,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:51:52,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:51:52,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167494910] [2020-10-12 09:51:52,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:51:52,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:53,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:51:53,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:53,005 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 4 states. [2020-10-12 09:51:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:53,229 INFO L93 Difference]: Finished difference Result 112 states and 173 transitions. [2020-10-12 09:51:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:51:53,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-12 09:51:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:53,241 INFO L225 Difference]: With dead ends: 112 [2020-10-12 09:51:53,241 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:51:53,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:51:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-10-12 09:51:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:51:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-12 09:51:53,294 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 31 [2020-10-12 09:51:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:53,295 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-12 09:51:53,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:51:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-12 09:51:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:51:53,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:53,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:53,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:51:53,299 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:53,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1898370412, now seen corresponding path program 1 times [2020-10-12 09:51:53,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:53,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887229836] [2020-10-12 09:51:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:53,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:54,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:58,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:51:58,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:51:58,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:51:58,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:58,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:58,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:51:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:58,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:58,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:58,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:58,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:58,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:58,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:58,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:58,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:58,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:58,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:58,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 09:51:58,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887229836] [2020-10-12 09:51:58,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:58,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:58,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992687302] [2020-10-12 09:51:58,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:58,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:58,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:58,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:58,386 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 5 states. [2020-10-12 09:51:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:58,604 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2020-10-12 09:51:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:58,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-10-12 09:51:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:58,607 INFO L225 Difference]: With dead ends: 125 [2020-10-12 09:51:58,607 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 09:51:58,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 09:51:58,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-12 09:51:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:51:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-12 09:51:58,620 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 49 [2020-10-12 09:51:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:58,620 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-12 09:51:58,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:58,621 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-12 09:51:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 09:51:58,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:58,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:58,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:51:58,624 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:58,624 INFO L82 PathProgramCache]: Analyzing trace with hash -885045022, now seen corresponding path program 2 times [2020-10-12 09:51:58,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:58,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569853532] [2020-10-12 09:51:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:58,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:03,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:52:03,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:52:03,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:52:03,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:03,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:52:03,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:52:03,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:52:03,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:03,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:03,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:03,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:03,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:03,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:52:03,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:03,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 09:52:03,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569853532] [2020-10-12 09:52:03,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:03,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:52:03,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679526826] [2020-10-12 09:52:03,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:52:03,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:03,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:52:03,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:52:03,720 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 6 states. [2020-10-12 09:52:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:04,016 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2020-10-12 09:52:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:52:04,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-12 09:52:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:04,018 INFO L225 Difference]: With dead ends: 159 [2020-10-12 09:52:04,018 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 09:52:04,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:52:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 09:52:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2020-10-12 09:52:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 09:52:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2020-10-12 09:52:04,031 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 67 [2020-10-12 09:52:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:04,031 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2020-10-12 09:52:04,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:52:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2020-10-12 09:52:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 09:52:04,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:04,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:04,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:52:04,034 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash 433336240, now seen corresponding path program 3 times [2020-10-12 09:52:04,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:04,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658752587] [2020-10-12 09:52:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:04,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:04,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:04,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:04,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:04,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:04,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:04,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:09,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 09:52:09,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:52:09,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:52:09,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:52:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:52:09,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:09,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:09,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:09,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:09,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:09,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:09,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:09,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:09,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:09,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:09,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:52:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-12 09:52:09,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658752587] [2020-10-12 09:52:09,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:09,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:52:09,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433626784] [2020-10-12 09:52:09,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:52:09,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:09,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:52:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:52:09,147 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 7 states. [2020-10-12 09:52:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:09,484 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2020-10-12 09:52:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:52:09,485 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-10-12 09:52:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:09,487 INFO L225 Difference]: With dead ends: 193 [2020-10-12 09:52:09,487 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 09:52:09,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:52:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 09:52:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2020-10-12 09:52:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 09:52:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-10-12 09:52:09,509 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 85 [2020-10-12 09:52:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:09,511 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-10-12 09:52:09,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:52:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-10-12 09:52:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 09:52:09,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:09,514 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:09,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:52:09,515 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1458127106, now seen corresponding path program 4 times [2020-10-12 09:52:09,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:09,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078150490] [2020-10-12 09:52:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:09,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:14,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:14,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 09:52:14,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:52:14,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-12 09:52:14,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:14,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:52:14,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-12 09:52:14,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:52:14,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:14,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:14,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:14,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:14,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:14,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:14,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:14,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:14,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:14,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:14,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-12 09:52:14,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078150490] [2020-10-12 09:52:14,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:14,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:52:14,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421951167] [2020-10-12 09:52:14,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:52:14,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:52:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:52:14,667 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 8 states. [2020-10-12 09:52:15,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:15,002 INFO L93 Difference]: Finished difference Result 227 states and 254 transitions. [2020-10-12 09:52:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:52:15,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2020-10-12 09:52:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:15,004 INFO L225 Difference]: With dead ends: 227 [2020-10-12 09:52:15,005 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 09:52:15,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:52:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 09:52:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2020-10-12 09:52:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 09:52:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2020-10-12 09:52:15,017 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 103 [2020-10-12 09:52:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:15,017 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2020-10-12 09:52:15,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:52:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2020-10-12 09:52:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-12 09:52:15,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:15,019 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:15,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:52:15,020 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash -846342452, now seen corresponding path program 5 times [2020-10-12 09:52:15,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:15,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522425803] [2020-10-12 09:52:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:15,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:17,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:20,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-12 09:52:20,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:52:20,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 09:52:20,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:20,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:52:20,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 09:52:20,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:52:20,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:52:20,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:20,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:20,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:20,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:20,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:20,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:20,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:20,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:20,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:20,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-12 09:52:20,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522425803] [2020-10-12 09:52:20,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:20,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:52:20,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077150457] [2020-10-12 09:52:20,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:52:20,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:20,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:52:20,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:52:20,153 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 9 states. [2020-10-12 09:52:20,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:20,520 INFO L93 Difference]: Finished difference Result 261 states and 288 transitions. [2020-10-12 09:52:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:52:20,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-10-12 09:52:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:20,522 INFO L225 Difference]: With dead ends: 261 [2020-10-12 09:52:20,522 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 09:52:20,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:52:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 09:52:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2020-10-12 09:52:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 09:52:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2020-10-12 09:52:20,533 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 121 [2020-10-12 09:52:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:20,534 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2020-10-12 09:52:20,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:52:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2020-10-12 09:52:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-12 09:52:20,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:20,536 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:20,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:52:20,536 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:20,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1882695910, now seen corresponding path program 6 times [2020-10-12 09:52:20,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:20,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375870137] [2020-10-12 09:52:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:20,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:25,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-12 09:52:25,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:52:25,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 09:52:25,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:52:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 09:52:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:52:25,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:25,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:25,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:25,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:25,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:25,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:25,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:25,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:25,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:25,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-12 09:52:25,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375870137] [2020-10-12 09:52:25,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:25,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:52:25,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442015985] [2020-10-12 09:52:25,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:52:25,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:25,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:52:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:52:25,691 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand 10 states. [2020-10-12 09:52:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:26,293 INFO L93 Difference]: Finished difference Result 295 states and 322 transitions. [2020-10-12 09:52:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:52:26,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2020-10-12 09:52:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:26,296 INFO L225 Difference]: With dead ends: 295 [2020-10-12 09:52:26,296 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 09:52:26,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:52:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 09:52:26,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 163. [2020-10-12 09:52:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 09:52:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 173 transitions. [2020-10-12 09:52:26,324 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 173 transitions. Word has length 139 [2020-10-12 09:52:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:26,325 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 173 transitions. [2020-10-12 09:52:26,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:52:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 173 transitions. [2020-10-12 09:52:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-12 09:52:26,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:26,331 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:26,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:52:26,336 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1168302104, now seen corresponding path program 7 times [2020-10-12 09:52:26,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:26,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080951721] [2020-10-12 09:52:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:26,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:31,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-12 09:52:31,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:31,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-12 09:52:31,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:52:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:52:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:52:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:31,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:31,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:31,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:31,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:31,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:31,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:31,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:31,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:31,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:31,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-12 09:52:31,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080951721] [2020-10-12 09:52:31,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:31,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:52:31,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165647718] [2020-10-12 09:52:31,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:52:31,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:31,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:52:31,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:52:31,529 INFO L87 Difference]: Start difference. First operand 163 states and 173 transitions. Second operand 11 states. [2020-10-12 09:52:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:32,052 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2020-10-12 09:52:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:52:32,052 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 157 [2020-10-12 09:52:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:32,054 INFO L225 Difference]: With dead ends: 329 [2020-10-12 09:52:32,054 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 09:52:32,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:52:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 09:52:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2020-10-12 09:52:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 09:52:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2020-10-12 09:52:32,067 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 157 [2020-10-12 09:52:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:32,068 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2020-10-12 09:52:32,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:52:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2020-10-12 09:52:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-12 09:52:32,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:32,070 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:32,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:52:32,070 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1743458614, now seen corresponding path program 8 times [2020-10-12 09:52:32,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:32,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532944027] [2020-10-12 09:52:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:32,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:37,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-12 09:52:37,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:37,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 09:52:37,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:52:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 09:52:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:52:37,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:37,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:37,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:37,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:37,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:37,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:37,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-12 09:52:37,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532944027] [2020-10-12 09:52:37,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:37,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:52:37,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148807988] [2020-10-12 09:52:37,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:52:37,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:37,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:52:37,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:52:37,255 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand 12 states. [2020-10-12 09:52:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:37,842 INFO L93 Difference]: Finished difference Result 363 states and 390 transitions. [2020-10-12 09:52:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:52:37,843 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 175 [2020-10-12 09:52:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:37,845 INFO L225 Difference]: With dead ends: 363 [2020-10-12 09:52:37,845 INFO L226 Difference]: Without dead ends: 208 [2020-10-12 09:52:37,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:52:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-12 09:52:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 199. [2020-10-12 09:52:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-12 09:52:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 209 transitions. [2020-10-12 09:52:37,854 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 209 transitions. Word has length 175 [2020-10-12 09:52:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:37,855 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 209 transitions. [2020-10-12 09:52:37,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:52:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 209 transitions. [2020-10-12 09:52:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-12 09:52:37,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:37,857 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:37,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:52:37,857 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:37,857 INFO L82 PathProgramCache]: Analyzing trace with hash 286853892, now seen corresponding path program 9 times [2020-10-12 09:52:37,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:37,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285199081] [2020-10-12 09:52:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:37,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:42,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:42,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-12 09:52:42,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:42,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-12 09:52:42,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:42,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:52:42,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:42,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:52:42,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:43,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:43,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:43,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:43,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:43,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:43,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:43,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:43,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-12 09:52:43,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285199081] [2020-10-12 09:52:43,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:43,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:52:43,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913294700] [2020-10-12 09:52:43,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:52:43,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:43,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:52:43,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:43,063 INFO L87 Difference]: Start difference. First operand 199 states and 209 transitions. Second operand 13 states. [2020-10-12 09:52:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:43,674 INFO L93 Difference]: Finished difference Result 397 states and 424 transitions. [2020-10-12 09:52:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:52:43,675 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 193 [2020-10-12 09:52:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:43,677 INFO L225 Difference]: With dead ends: 397 [2020-10-12 09:52:43,677 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 09:52:43,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 09:52:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2020-10-12 09:52:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-12 09:52:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 227 transitions. [2020-10-12 09:52:43,686 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 227 transitions. Word has length 193 [2020-10-12 09:52:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:43,686 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 227 transitions. [2020-10-12 09:52:43,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:52:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 227 transitions. [2020-10-12 09:52:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-12 09:52:43,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:43,689 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:43,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:52:43,690 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:43,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:43,690 INFO L82 PathProgramCache]: Analyzing trace with hash 446033234, now seen corresponding path program 10 times [2020-10-12 09:52:43,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:43,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145889218] [2020-10-12 09:52:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:43,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:48,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:48,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-12 09:52:48,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:48,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:52:48,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:48,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:52:48,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:48,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:52:48,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:48,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:48,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:48,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:48,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:48,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:48,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:48,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:48,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-12 09:52:48,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145889218] [2020-10-12 09:52:48,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:48,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:52:48,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517297658] [2020-10-12 09:52:48,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:52:48,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:48,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:52:48,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:48,862 INFO L87 Difference]: Start difference. First operand 217 states and 227 transitions. Second operand 14 states. [2020-10-12 09:52:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:49,503 INFO L93 Difference]: Finished difference Result 431 states and 458 transitions. [2020-10-12 09:52:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:52:49,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 211 [2020-10-12 09:52:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:49,506 INFO L225 Difference]: With dead ends: 431 [2020-10-12 09:52:49,506 INFO L226 Difference]: Without dead ends: 244 [2020-10-12 09:52:49,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-12 09:52:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 235. [2020-10-12 09:52:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-12 09:52:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 245 transitions. [2020-10-12 09:52:49,524 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 245 transitions. Word has length 211 [2020-10-12 09:52:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:49,526 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 245 transitions. [2020-10-12 09:52:49,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:52:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 245 transitions. [2020-10-12 09:52:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-12 09:52:49,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:49,532 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:49,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:52:49,533 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash -484927456, now seen corresponding path program 11 times [2020-10-12 09:52:49,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:49,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049528292] [2020-10-12 09:52:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:49,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:54,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:54,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-12 09:52:54,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:54,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 09:52:54,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:54,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:54,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:54,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:54,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:54,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:54,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:54,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:54,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:54,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:54,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:54,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:54,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-12 09:52:54,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049528292] [2020-10-12 09:52:54,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:54,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:54,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645270668] [2020-10-12 09:52:54,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:54,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:54,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:54,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:54,738 INFO L87 Difference]: Start difference. First operand 235 states and 245 transitions. Second operand 15 states. [2020-10-12 09:52:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:55,435 INFO L93 Difference]: Finished difference Result 465 states and 492 transitions. [2020-10-12 09:52:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:55,435 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 229 [2020-10-12 09:52:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:55,438 INFO L225 Difference]: With dead ends: 465 [2020-10-12 09:52:55,438 INFO L226 Difference]: Without dead ends: 262 [2020-10-12 09:52:55,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-12 09:52:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 253. [2020-10-12 09:52:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-12 09:52:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 263 transitions. [2020-10-12 09:52:55,450 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 263 transitions. Word has length 229 [2020-10-12 09:52:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:55,450 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 263 transitions. [2020-10-12 09:52:55,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 263 transitions. [2020-10-12 09:52:55,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-12 09:52:55,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:55,454 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:55,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:52:55,454 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1365240686, now seen corresponding path program 12 times [2020-10-12 09:52:55,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:55,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065640817] [2020-10-12 09:52:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:55,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:00,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-12 09:53:00,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:00,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-10-12 09:53:00,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:53:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:53:00,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:00,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:00,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:00,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:00,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:00,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:00,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:00,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:00,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:00,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-12 09:53:00,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065640817] [2020-10-12 09:53:00,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:00,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:53:00,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15841488] [2020-10-12 09:53:00,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:53:00,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:00,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:53:00,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:53:00,811 INFO L87 Difference]: Start difference. First operand 253 states and 263 transitions. Second operand 16 states. [2020-10-12 09:53:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:01,558 INFO L93 Difference]: Finished difference Result 499 states and 526 transitions. [2020-10-12 09:53:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:53:01,559 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 247 [2020-10-12 09:53:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:01,562 INFO L225 Difference]: With dead ends: 499 [2020-10-12 09:53:01,562 INFO L226 Difference]: Without dead ends: 280 [2020-10-12 09:53:01,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:53:01,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-12 09:53:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 271. [2020-10-12 09:53:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-12 09:53:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 281 transitions. [2020-10-12 09:53:01,573 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 281 transitions. Word has length 247 [2020-10-12 09:53:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:01,573 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 281 transitions. [2020-10-12 09:53:01,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:53:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 281 transitions. [2020-10-12 09:53:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-12 09:53:01,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:01,576 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:01,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:53:01,576 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:01,576 INFO L82 PathProgramCache]: Analyzing trace with hash -499988676, now seen corresponding path program 13 times [2020-10-12 09:53:01,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:01,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603625255] [2020-10-12 09:53:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:01,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:06,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-12 09:53:06,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:06,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5147 [2020-10-12 09:53:06,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:53:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-12 09:53:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:53:06,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:06,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:06,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:06,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:06,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:06,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:06,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:06,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:06,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:06,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-12 09:53:06,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603625255] [2020-10-12 09:53:06,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:06,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:53:06,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968945716] [2020-10-12 09:53:06,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:53:06,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:06,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:53:06,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:53:06,968 INFO L87 Difference]: Start difference. First operand 271 states and 281 transitions. Second operand 17 states. [2020-10-12 09:53:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:07,706 INFO L93 Difference]: Finished difference Result 533 states and 560 transitions. [2020-10-12 09:53:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:53:07,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 265 [2020-10-12 09:53:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:07,710 INFO L225 Difference]: With dead ends: 533 [2020-10-12 09:53:07,710 INFO L226 Difference]: Without dead ends: 298 [2020-10-12 09:53:07,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:53:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-12 09:53:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 289. [2020-10-12 09:53:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-12 09:53:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 299 transitions. [2020-10-12 09:53:07,723 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 299 transitions. Word has length 265 [2020-10-12 09:53:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:07,723 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 299 transitions. [2020-10-12 09:53:07,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:53:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 299 transitions. [2020-10-12 09:53:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-12 09:53:07,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:07,725 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:07,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:53:07,726 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:07,726 INFO L82 PathProgramCache]: Analyzing trace with hash 912264074, now seen corresponding path program 14 times [2020-10-12 09:53:07,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:07,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269845966] [2020-10-12 09:53:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:07,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:13,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-12 09:53:13,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:13,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5479 [2020-10-12 09:53:13,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:53:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 09:53:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:53:13,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:13,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:13,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:13,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:13,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:13,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:13,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:13,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:13,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:13,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:13,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-12 09:53:13,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269845966] [2020-10-12 09:53:13,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:13,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:53:13,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659526667] [2020-10-12 09:53:13,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:53:13,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:13,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:53:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:53:13,468 INFO L87 Difference]: Start difference. First operand 289 states and 299 transitions. Second operand 18 states. [2020-10-12 09:53:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:14,248 INFO L93 Difference]: Finished difference Result 567 states and 594 transitions. [2020-10-12 09:53:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:53:14,248 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 283 [2020-10-12 09:53:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:14,250 INFO L225 Difference]: With dead ends: 567 [2020-10-12 09:53:14,250 INFO L226 Difference]: Without dead ends: 316 [2020-10-12 09:53:14,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:53:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-12 09:53:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 307. [2020-10-12 09:53:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-12 09:53:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 317 transitions. [2020-10-12 09:53:14,262 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 317 transitions. Word has length 283 [2020-10-12 09:53:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:14,263 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 317 transitions. [2020-10-12 09:53:14,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:53:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 317 transitions. [2020-10-12 09:53:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-12 09:53:14,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:14,265 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:14,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:53:14,266 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash 549361752, now seen corresponding path program 15 times [2020-10-12 09:53:14,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:14,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969494370] [2020-10-12 09:53:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:14,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:19,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:19,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-12 09:53:19,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:19,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:53:19,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:53:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-12 09:53:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:53:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:19,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:19,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:19,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:19,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:19,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:19,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:19,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:19,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:19,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:19,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:19,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-12 09:53:19,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969494370] [2020-10-12 09:53:19,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:19,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:53:19,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585885371] [2020-10-12 09:53:19,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:53:19,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:19,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:53:19,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:53:19,564 INFO L87 Difference]: Start difference. First operand 307 states and 317 transitions. Second operand 19 states. [2020-10-12 09:53:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:20,409 INFO L93 Difference]: Finished difference Result 601 states and 628 transitions. [2020-10-12 09:53:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:53:20,410 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 301 [2020-10-12 09:53:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:20,412 INFO L225 Difference]: With dead ends: 601 [2020-10-12 09:53:20,412 INFO L226 Difference]: Without dead ends: 334 [2020-10-12 09:53:20,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:53:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-12 09:53:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 325. [2020-10-12 09:53:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-12 09:53:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 335 transitions. [2020-10-12 09:53:20,425 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 335 transitions. Word has length 301 [2020-10-12 09:53:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:20,425 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 335 transitions. [2020-10-12 09:53:20,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:53:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 335 transitions. [2020-10-12 09:53:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-12 09:53:20,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:20,427 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:20,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:53:20,428 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:20,428 INFO L82 PathProgramCache]: Analyzing trace with hash 875384230, now seen corresponding path program 16 times [2020-10-12 09:53:20,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:20,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871297036] [2020-10-12 09:53:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:25,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:25,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-12 09:53:25,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:25,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5370 [2020-10-12 09:53:25,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:25,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:53:25,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 09:53:25,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:53:25,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:26,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:26,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:26,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:26,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:26,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:26,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:26,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:26,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:26,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:26,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:26,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-12 09:53:26,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871297036] [2020-10-12 09:53:26,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:26,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:53:26,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484489186] [2020-10-12 09:53:26,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:53:26,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:53:26,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:53:26,104 INFO L87 Difference]: Start difference. First operand 325 states and 335 transitions. Second operand 20 states. [2020-10-12 09:53:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:26,972 INFO L93 Difference]: Finished difference Result 635 states and 662 transitions. [2020-10-12 09:53:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:53:26,973 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 319 [2020-10-12 09:53:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:26,975 INFO L225 Difference]: With dead ends: 635 [2020-10-12 09:53:26,975 INFO L226 Difference]: Without dead ends: 352 [2020-10-12 09:53:26,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:53:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-12 09:53:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 343. [2020-10-12 09:53:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-12 09:53:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 353 transitions. [2020-10-12 09:53:26,988 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 353 transitions. Word has length 319 [2020-10-12 09:53:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:26,988 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 353 transitions. [2020-10-12 09:53:26,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:53:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 353 transitions. [2020-10-12 09:53:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-12 09:53:26,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:26,991 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:26,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:53:26,991 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:26,991 INFO L82 PathProgramCache]: Analyzing trace with hash -778892428, now seen corresponding path program 17 times [2020-10-12 09:53:26,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:26,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851636774] [2020-10-12 09:53:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:27,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:32,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-12 09:53:32,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:32,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5376 [2020-10-12 09:53:32,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:53:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-12 09:53:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:53:32,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:32,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:32,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:32,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:32,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-12 09:53:32,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851636774] [2020-10-12 09:53:32,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:32,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:53:32,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264330100] [2020-10-12 09:53:32,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:53:32,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:53:32,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:53:32,717 INFO L87 Difference]: Start difference. First operand 343 states and 353 transitions. Second operand 21 states. [2020-10-12 09:53:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:33,694 INFO L93 Difference]: Finished difference Result 669 states and 696 transitions. [2020-10-12 09:53:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:53:33,695 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 337 [2020-10-12 09:53:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:33,698 INFO L225 Difference]: With dead ends: 669 [2020-10-12 09:53:33,698 INFO L226 Difference]: Without dead ends: 370 [2020-10-12 09:53:33,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:53:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-12 09:53:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 361. [2020-10-12 09:53:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-12 09:53:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 371 transitions. [2020-10-12 09:53:33,720 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 371 transitions. Word has length 337 [2020-10-12 09:53:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:33,722 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 371 transitions. [2020-10-12 09:53:33,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:53:33,723 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 371 transitions. [2020-10-12 09:53:33,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-12 09:53:33,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:33,727 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:33,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:53:33,727 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:33,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1243696702, now seen corresponding path program 18 times [2020-10-12 09:53:33,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:33,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855076518] [2020-10-12 09:53:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:33,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:33,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:38,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:38,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 363 [2020-10-12 09:53:38,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-12 09:53:38,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:53:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-12 09:53:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:53:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:39,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:39,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:39,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:39,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:39,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:39,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:39,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:39,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:39,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:39,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-12 09:53:39,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855076518] [2020-10-12 09:53:39,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:39,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:53:39,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292182171] [2020-10-12 09:53:39,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:53:39,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:39,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:53:39,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:39,199 INFO L87 Difference]: Start difference. First operand 361 states and 371 transitions. Second operand 22 states. [2020-10-12 09:53:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:40,242 INFO L93 Difference]: Finished difference Result 703 states and 730 transitions. [2020-10-12 09:53:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:53:40,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 355 [2020-10-12 09:53:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:40,244 INFO L225 Difference]: With dead ends: 703 [2020-10-12 09:53:40,245 INFO L226 Difference]: Without dead ends: 388 [2020-10-12 09:53:40,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-12 09:53:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 379. [2020-10-12 09:53:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-12 09:53:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 389 transitions. [2020-10-12 09:53:40,273 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 389 transitions. Word has length 355 [2020-10-12 09:53:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:40,275 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 389 transitions. [2020-10-12 09:53:40,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:53:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 389 transitions. [2020-10-12 09:53:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-12 09:53:40,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:40,281 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:40,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:53:40,282 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:40,282 INFO L82 PathProgramCache]: Analyzing trace with hash 134684816, now seen corresponding path program 19 times [2020-10-12 09:53:40,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:40,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223358274] [2020-10-12 09:53:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:40,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:45,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:45,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-12 09:53:45,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:45,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5166 [2020-10-12 09:53:45,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:53:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-12 09:53:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:53:45,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:45,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:45,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:45,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:45,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:45,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:45,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:45,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:45,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:45,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:45,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2020-10-12 09:53:46,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223358274] [2020-10-12 09:53:46,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:46,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:53:46,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280289214] [2020-10-12 09:53:46,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:53:46,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:46,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:53:46,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:46,068 INFO L87 Difference]: Start difference. First operand 379 states and 389 transitions. Second operand 23 states. [2020-10-12 09:53:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:47,176 INFO L93 Difference]: Finished difference Result 737 states and 764 transitions. [2020-10-12 09:53:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:53:47,176 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 373 [2020-10-12 09:53:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:47,179 INFO L225 Difference]: With dead ends: 737 [2020-10-12 09:53:47,179 INFO L226 Difference]: Without dead ends: 406 [2020-10-12 09:53:47,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-12 09:53:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 397. [2020-10-12 09:53:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-12 09:53:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 407 transitions. [2020-10-12 09:53:47,196 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 407 transitions. Word has length 373 [2020-10-12 09:53:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:47,197 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 407 transitions. [2020-10-12 09:53:47,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:53:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 407 transitions. [2020-10-12 09:53:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-12 09:53:47,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:47,200 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:47,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:53:47,200 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash -418695202, now seen corresponding path program 20 times [2020-10-12 09:53:47,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:47,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558337895] [2020-10-12 09:53:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:47,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:52,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 399 [2020-10-12 09:53:52,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:52,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5245 [2020-10-12 09:53:52,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:52,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:53:52,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 09:53:52,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:53:52,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:52,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:52,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:52,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:52,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:52,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:52,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:52,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2020-10-12 09:53:53,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558337895] [2020-10-12 09:53:53,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:53,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:53:53,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626700215] [2020-10-12 09:53:53,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:53:53,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:53,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:53:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:53,090 INFO L87 Difference]: Start difference. First operand 397 states and 407 transitions. Second operand 24 states. [2020-10-12 09:53:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:54,117 INFO L93 Difference]: Finished difference Result 771 states and 798 transitions. [2020-10-12 09:53:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:53:54,118 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 391 [2020-10-12 09:53:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:54,122 INFO L225 Difference]: With dead ends: 771 [2020-10-12 09:53:54,123 INFO L226 Difference]: Without dead ends: 424 [2020-10-12 09:53:54,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-12 09:53:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 415. [2020-10-12 09:53:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-10-12 09:53:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 425 transitions. [2020-10-12 09:53:54,135 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 425 transitions. Word has length 391 [2020-10-12 09:53:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:54,135 INFO L479 AbstractCegarLoop]: Abstraction has 415 states and 425 transitions. [2020-10-12 09:53:54,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:53:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 425 transitions. [2020-10-12 09:53:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-10-12 09:53:54,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:54,138 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:54,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:53:54,139 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:54,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:54,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2012338092, now seen corresponding path program 21 times [2020-10-12 09:53:54,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:54,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320964831] [2020-10-12 09:53:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:54,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:59,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:59,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-10-12 09:53:59,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:59,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5737 [2020-10-12 09:53:59,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:53:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-12 09:53:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:53:59,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:00,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:00,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:00,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:00,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:00,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:00,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:00,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:00,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:00,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:00,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2020-10-12 09:54:00,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320964831] [2020-10-12 09:54:00,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:00,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:54:00,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884652728] [2020-10-12 09:54:00,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:54:00,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:00,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:54:00,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:54:00,397 INFO L87 Difference]: Start difference. First operand 415 states and 425 transitions. Second operand 25 states. [2020-10-12 09:54:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:01,446 INFO L93 Difference]: Finished difference Result 805 states and 832 transitions. [2020-10-12 09:54:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:54:01,448 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 409 [2020-10-12 09:54:01,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:01,450 INFO L225 Difference]: With dead ends: 805 [2020-10-12 09:54:01,450 INFO L226 Difference]: Without dead ends: 442 [2020-10-12 09:54:01,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:54:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-12 09:54:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 433. [2020-10-12 09:54:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-12 09:54:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 443 transitions. [2020-10-12 09:54:01,464 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 443 transitions. Word has length 409 [2020-10-12 09:54:01,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:01,464 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 443 transitions. [2020-10-12 09:54:01,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:54:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 443 transitions. [2020-10-12 09:54:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-10-12 09:54:01,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:01,468 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:01,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:54:01,468 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:01,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1942609914, now seen corresponding path program 22 times [2020-10-12 09:54:01,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:01,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766163686] [2020-10-12 09:54:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:01,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:06,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 435 [2020-10-12 09:54:06,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:54:06,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5475 [2020-10-12 09:54:06,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:54:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-12 09:54:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:54:06,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:07,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:07,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:07,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:07,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:07,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:07,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:07,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:07,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:07,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2020-10-12 09:54:07,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766163686] [2020-10-12 09:54:07,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:07,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:54:07,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445843180] [2020-10-12 09:54:07,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:54:07,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:07,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:54:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:54:07,452 INFO L87 Difference]: Start difference. First operand 433 states and 443 transitions. Second operand 26 states. [2020-10-12 09:54:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:08,507 INFO L93 Difference]: Finished difference Result 839 states and 866 transitions. [2020-10-12 09:54:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:54:08,507 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 427 [2020-10-12 09:54:08,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:08,511 INFO L225 Difference]: With dead ends: 839 [2020-10-12 09:54:08,511 INFO L226 Difference]: Without dead ends: 460 [2020-10-12 09:54:08,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:54:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-12 09:54:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2020-10-12 09:54:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-12 09:54:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 461 transitions. [2020-10-12 09:54:08,523 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 461 transitions. Word has length 427 [2020-10-12 09:54:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:08,524 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 461 transitions. [2020-10-12 09:54:08,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:54:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 461 transitions. [2020-10-12 09:54:08,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-10-12 09:54:08,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:08,527 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:08,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:54:08,528 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:08,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash 900346056, now seen corresponding path program 23 times [2020-10-12 09:54:08,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:08,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217845042] [2020-10-12 09:54:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:08,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:13,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:13,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 453 [2020-10-12 09:54:13,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:54:13,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5394 [2020-10-12 09:54:13,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:13,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:54:13,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-12 09:54:13,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:54:13,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:14,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:14,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:14,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:14,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:14,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:14,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:14,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:14,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2020-10-12 09:54:14,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217845042] [2020-10-12 09:54:14,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:14,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:54:14,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029853727] [2020-10-12 09:54:14,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:54:14,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:54:14,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:54:14,459 INFO L87 Difference]: Start difference. First operand 451 states and 461 transitions. Second operand 27 states. [2020-10-12 09:54:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:15,756 INFO L93 Difference]: Finished difference Result 873 states and 900 transitions. [2020-10-12 09:54:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:54:15,756 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 445 [2020-10-12 09:54:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:15,759 INFO L225 Difference]: With dead ends: 873 [2020-10-12 09:54:15,759 INFO L226 Difference]: Without dead ends: 478 [2020-10-12 09:54:15,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:54:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-12 09:54:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 469. [2020-10-12 09:54:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-12 09:54:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 479 transitions. [2020-10-12 09:54:15,772 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 479 transitions. Word has length 445 [2020-10-12 09:54:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:15,773 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 479 transitions. [2020-10-12 09:54:15,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:54:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 479 transitions. [2020-10-12 09:54:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-10-12 09:54:15,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:15,782 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:15,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:54:15,785 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1219602966, now seen corresponding path program 24 times [2020-10-12 09:54:15,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:15,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760473571] [2020-10-12 09:54:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:15,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:16,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:16,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 471 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5307 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:21,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:21,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:21,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:21,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:21,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:21,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:21,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:21,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:21,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2020-10-12 09:54:21,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760473571] [2020-10-12 09:54:21,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:21,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:54:21,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548283512] [2020-10-12 09:54:21,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:54:21,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:54:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:54:21,772 INFO L87 Difference]: Start difference. First operand 469 states and 479 transitions. Second operand 28 states. [2020-10-12 09:54:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:23,119 INFO L93 Difference]: Finished difference Result 907 states and 934 transitions. [2020-10-12 09:54:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:54:23,120 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 463 [2020-10-12 09:54:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:23,122 INFO L225 Difference]: With dead ends: 907 [2020-10-12 09:54:23,123 INFO L226 Difference]: Without dead ends: 496 [2020-10-12 09:54:23,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:54:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-12 09:54:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 487. [2020-10-12 09:54:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-10-12 09:54:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 497 transitions. [2020-10-12 09:54:23,135 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 497 transitions. Word has length 463 [2020-10-12 09:54:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:23,136 INFO L479 AbstractCegarLoop]: Abstraction has 487 states and 497 transitions. [2020-10-12 09:54:23,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:54:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 497 transitions. [2020-10-12 09:54:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-10-12 09:54:23,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:23,140 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:23,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:54:23,140 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:23,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1980181476, now seen corresponding path program 25 times [2020-10-12 09:54:23,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:23,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25222349] [2020-10-12 09:54:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:23,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:23,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:23,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:23,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:23,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:23,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:28,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 489 [2020-10-12 09:54:28,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:54:28,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5221 [2020-10-12 09:54:28,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:28,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:54:28,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 09:54:28,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:54:28,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:28,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:28,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:28,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:28,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:28,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:28,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:28,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:28,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:28,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:28,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2020-10-12 09:54:29,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25222349] [2020-10-12 09:54:29,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:29,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:54:29,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636879257] [2020-10-12 09:54:29,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:54:29,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:29,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:54:29,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:54:29,099 INFO L87 Difference]: Start difference. First operand 487 states and 497 transitions. Second operand 29 states. [2020-10-12 09:54:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:30,533 INFO L93 Difference]: Finished difference Result 941 states and 968 transitions. [2020-10-12 09:54:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:54:30,534 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 481 [2020-10-12 09:54:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:30,536 INFO L225 Difference]: With dead ends: 941 [2020-10-12 09:54:30,536 INFO L226 Difference]: Without dead ends: 514 [2020-10-12 09:54:30,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:54:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-12 09:54:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 505. [2020-10-12 09:54:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-12 09:54:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 515 transitions. [2020-10-12 09:54:30,549 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 515 transitions. Word has length 481 [2020-10-12 09:54:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:30,549 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 515 transitions. [2020-10-12 09:54:30,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:54:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 515 transitions. [2020-10-12 09:54:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-12 09:54:30,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:30,553 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:30,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:54:30,554 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:30,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1389991474, now seen corresponding path program 26 times [2020-10-12 09:54:30,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:30,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698296101] [2020-10-12 09:54:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:30,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:36,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:36,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 507 [2020-10-12 09:54:36,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:54:36,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5476 [2020-10-12 09:54:36,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:54:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:54:36,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:36,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:36,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:36,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:36,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:36,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:36,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:36,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:36,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2020-10-12 09:54:36,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698296101] [2020-10-12 09:54:36,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:36,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:54:36,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50537461] [2020-10-12 09:54:36,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:54:36,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:36,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:54:36,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:54:36,798 INFO L87 Difference]: Start difference. First operand 505 states and 515 transitions. Second operand 30 states. [2020-10-12 09:54:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:38,298 INFO L93 Difference]: Finished difference Result 975 states and 1002 transitions. [2020-10-12 09:54:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:54:38,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 499 [2020-10-12 09:54:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:38,302 INFO L225 Difference]: With dead ends: 975 [2020-10-12 09:54:38,302 INFO L226 Difference]: Without dead ends: 532 [2020-10-12 09:54:38,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:54:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-12 09:54:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 523. [2020-10-12 09:54:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-10-12 09:54:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 533 transitions. [2020-10-12 09:54:38,319 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 533 transitions. Word has length 499 [2020-10-12 09:54:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:38,319 INFO L479 AbstractCegarLoop]: Abstraction has 523 states and 533 transitions. [2020-10-12 09:54:38,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:54:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 533 transitions. [2020-10-12 09:54:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-10-12 09:54:38,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:38,323 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:38,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:54:38,323 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:38,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1314900224, now seen corresponding path program 27 times [2020-10-12 09:54:38,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:38,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995945629] [2020-10-12 09:54:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:38,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:43,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:43,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 525 [2020-10-12 09:54:43,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:54:43,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5358 [2020-10-12 09:54:43,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:54:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-12 09:54:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:54:43,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:44,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:44,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:44,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:44,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:44,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:44,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:44,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:44,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:44,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:44,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:44,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2020-10-12 09:54:44,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995945629] [2020-10-12 09:54:44,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:44,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:54:44,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426517817] [2020-10-12 09:54:44,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:54:44,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:44,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:54:44,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:44,402 INFO L87 Difference]: Start difference. First operand 523 states and 533 transitions. Second operand 31 states. [2020-10-12 09:54:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:45,828 INFO L93 Difference]: Finished difference Result 1009 states and 1036 transitions. [2020-10-12 09:54:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:54:45,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 517 [2020-10-12 09:54:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:45,832 INFO L225 Difference]: With dead ends: 1009 [2020-10-12 09:54:45,832 INFO L226 Difference]: Without dead ends: 550 [2020-10-12 09:54:45,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-10-12 09:54:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 541. [2020-10-12 09:54:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-10-12 09:54:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 551 transitions. [2020-10-12 09:54:45,845 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 551 transitions. Word has length 517 [2020-10-12 09:54:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:45,845 INFO L479 AbstractCegarLoop]: Abstraction has 541 states and 551 transitions. [2020-10-12 09:54:45,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:54:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 551 transitions. [2020-10-12 09:54:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-10-12 09:54:45,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:45,849 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:45,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:54:45,850 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:45,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1071162446, now seen corresponding path program 28 times [2020-10-12 09:54:45,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:45,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19968702] [2020-10-12 09:54:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:45,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:45,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:45,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:52,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:52,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 543 [2020-10-12 09:54:52,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:54:52,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6172 [2020-10-12 09:54:52,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:54:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 245 [2020-10-12 09:54:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:54:52,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:52,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:52,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:52,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:52,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:52,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:52,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:52,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:52,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:52,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:52,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:52,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2020-10-12 09:54:52,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19968702] [2020-10-12 09:54:52,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:52,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:54:52,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864690420] [2020-10-12 09:54:52,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:54:52,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:52,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:54:52,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:52,793 INFO L87 Difference]: Start difference. First operand 541 states and 551 transitions. Second operand 32 states. [2020-10-12 09:54:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:54,411 INFO L93 Difference]: Finished difference Result 1043 states and 1070 transitions. [2020-10-12 09:54:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:54:54,416 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 535 [2020-10-12 09:54:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:54,418 INFO L225 Difference]: With dead ends: 1043 [2020-10-12 09:54:54,418 INFO L226 Difference]: Without dead ends: 568 [2020-10-12 09:54:54,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-12 09:54:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 559. [2020-10-12 09:54:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-10-12 09:54:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 569 transitions. [2020-10-12 09:54:54,431 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 569 transitions. Word has length 535 [2020-10-12 09:54:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:54,431 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 569 transitions. [2020-10-12 09:54:54,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:54:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 569 transitions. [2020-10-12 09:54:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2020-10-12 09:54:54,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:54,436 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:54,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:54:54,436 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1955268636, now seen corresponding path program 29 times [2020-10-12 09:54:54,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:54,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428222368] [2020-10-12 09:54:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:54,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:59,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:59,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 561 [2020-10-12 09:54:59,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:54:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5252 [2020-10-12 09:54:59,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:54:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:54:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:54:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:00,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:00,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:00,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:00,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:00,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:00,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:00,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:00,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:00,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:00,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:00,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2020-10-12 09:55:00,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428222368] [2020-10-12 09:55:00,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:00,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:55:00,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482784097] [2020-10-12 09:55:00,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:55:00,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:00,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:55:00,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:55:00,504 INFO L87 Difference]: Start difference. First operand 559 states and 569 transitions. Second operand 33 states. [2020-10-12 09:55:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:02,323 INFO L93 Difference]: Finished difference Result 1077 states and 1104 transitions. [2020-10-12 09:55:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:55:02,324 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 553 [2020-10-12 09:55:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:02,328 INFO L225 Difference]: With dead ends: 1077 [2020-10-12 09:55:02,328 INFO L226 Difference]: Without dead ends: 586 [2020-10-12 09:55:02,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:55:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-10-12 09:55:02,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 577. [2020-10-12 09:55:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-12 09:55:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 587 transitions. [2020-10-12 09:55:02,343 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 587 transitions. Word has length 553 [2020-10-12 09:55:02,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:02,344 INFO L479 AbstractCegarLoop]: Abstraction has 577 states and 587 transitions. [2020-10-12 09:55:02,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:55:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 587 transitions. [2020-10-12 09:55:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-10-12 09:55:02,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:02,349 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:02,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:55:02,349 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:02,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1036375146, now seen corresponding path program 30 times [2020-10-12 09:55:02,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:02,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117502602] [2020-10-12 09:55:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:02,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:02,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:02,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:02,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:02,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:08,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:08,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 579 [2020-10-12 09:55:08,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:08,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6516 [2020-10-12 09:55:08,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:55:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-12 09:55:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:55:08,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:09,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:09,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:09,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:09,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:09,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:09,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:09,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:09,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:09,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:09,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:09,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2020-10-12 09:55:09,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117502602] [2020-10-12 09:55:09,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:09,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:55:09,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367621206] [2020-10-12 09:55:09,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:55:09,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:09,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:55:09,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:55:09,798 INFO L87 Difference]: Start difference. First operand 577 states and 587 transitions. Second operand 34 states. [2020-10-12 09:55:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:11,664 INFO L93 Difference]: Finished difference Result 1111 states and 1138 transitions. [2020-10-12 09:55:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:55:11,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 571 [2020-10-12 09:55:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:11,670 INFO L225 Difference]: With dead ends: 1111 [2020-10-12 09:55:11,670 INFO L226 Difference]: Without dead ends: 604 [2020-10-12 09:55:11,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:55:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-10-12 09:55:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 595. [2020-10-12 09:55:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-12 09:55:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 605 transitions. [2020-10-12 09:55:11,683 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 605 transitions. Word has length 571 [2020-10-12 09:55:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:11,684 INFO L479 AbstractCegarLoop]: Abstraction has 595 states and 605 transitions. [2020-10-12 09:55:11,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:55:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 605 transitions. [2020-10-12 09:55:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2020-10-12 09:55:11,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:11,690 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:11,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:55:11,690 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:11,690 INFO L82 PathProgramCache]: Analyzing trace with hash -18880200, now seen corresponding path program 31 times [2020-10-12 09:55:11,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:11,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738325384] [2020-10-12 09:55:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:11,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:11,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:12,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:12,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:18,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:18,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 597 [2020-10-12 09:55:18,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:18,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6974 [2020-10-12 09:55:18,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:55:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 269 [2020-10-12 09:55:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:55:18,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:19,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:19,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:19,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:19,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:19,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:19,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:19,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:19,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:19,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:19,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2020-10-12 09:55:19,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738325384] [2020-10-12 09:55:19,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:19,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:55:19,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59638701] [2020-10-12 09:55:19,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:55:19,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:19,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:55:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:55:19,657 INFO L87 Difference]: Start difference. First operand 595 states and 605 transitions. Second operand 35 states. [2020-10-12 09:55:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:21,508 INFO L93 Difference]: Finished difference Result 1145 states and 1172 transitions. [2020-10-12 09:55:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:55:21,508 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 589 [2020-10-12 09:55:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:21,511 INFO L225 Difference]: With dead ends: 1145 [2020-10-12 09:55:21,511 INFO L226 Difference]: Without dead ends: 622 [2020-10-12 09:55:21,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:55:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-10-12 09:55:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 613. [2020-10-12 09:55:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-10-12 09:55:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 623 transitions. [2020-10-12 09:55:21,524 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 623 transitions. Word has length 589 [2020-10-12 09:55:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:21,525 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 623 transitions. [2020-10-12 09:55:21,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:55:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 623 transitions. [2020-10-12 09:55:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2020-10-12 09:55:21,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:21,530 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:21,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:55:21,530 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1153948026, now seen corresponding path program 32 times [2020-10-12 09:55:21,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:21,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840817098] [2020-10-12 09:55:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:21,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:27,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:27,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 615 [2020-10-12 09:55:27,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:27,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5478 [2020-10-12 09:55:27,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:55:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 211 [2020-10-12 09:55:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:55:27,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:27,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:27,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:27,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:27,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:27,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:27,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:27,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:27,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:27,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:27,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:27,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2020-10-12 09:55:27,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840817098] [2020-10-12 09:55:27,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:27,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:55:27,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71385838] [2020-10-12 09:55:27,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:55:27,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:55:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:55:27,995 INFO L87 Difference]: Start difference. First operand 613 states and 623 transitions. Second operand 36 states. [2020-10-12 09:55:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:29,811 INFO L93 Difference]: Finished difference Result 1179 states and 1206 transitions. [2020-10-12 09:55:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:55:29,811 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 607 [2020-10-12 09:55:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:29,815 INFO L225 Difference]: With dead ends: 1179 [2020-10-12 09:55:29,815 INFO L226 Difference]: Without dead ends: 640 [2020-10-12 09:55:29,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:55:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-12 09:55:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 631. [2020-10-12 09:55:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-10-12 09:55:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 641 transitions. [2020-10-12 09:55:29,828 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 641 transitions. Word has length 607 [2020-10-12 09:55:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:29,828 INFO L479 AbstractCegarLoop]: Abstraction has 631 states and 641 transitions. [2020-10-12 09:55:29,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:55:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 641 transitions. [2020-10-12 09:55:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2020-10-12 09:55:29,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:29,834 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:29,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:55:29,834 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:29,835 INFO L82 PathProgramCache]: Analyzing trace with hash 607480916, now seen corresponding path program 33 times [2020-10-12 09:55:29,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:29,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499090086] [2020-10-12 09:55:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:35,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:35,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 633 [2020-10-12 09:55:35,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:35,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5322 [2020-10-12 09:55:35,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:55:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 285 [2020-10-12 09:55:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:55:35,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:36,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:36,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:36,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:36,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:36,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:36,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:36,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:36,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2020-10-12 09:55:36,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499090086] [2020-10-12 09:55:36,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:36,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:55:36,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115618496] [2020-10-12 09:55:36,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:55:36,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:36,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:55:36,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:55:36,197 INFO L87 Difference]: Start difference. First operand 631 states and 641 transitions. Second operand 37 states. [2020-10-12 09:55:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:38,234 INFO L93 Difference]: Finished difference Result 1213 states and 1240 transitions. [2020-10-12 09:55:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:55:38,235 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 625 [2020-10-12 09:55:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:38,239 INFO L225 Difference]: With dead ends: 1213 [2020-10-12 09:55:38,239 INFO L226 Difference]: Without dead ends: 658 [2020-10-12 09:55:38,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:55:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-12 09:55:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 649. [2020-10-12 09:55:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-10-12 09:55:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 659 transitions. [2020-10-12 09:55:38,252 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 659 transitions. Word has length 625 [2020-10-12 09:55:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:38,252 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 659 transitions. [2020-10-12 09:55:38,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:55:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 659 transitions. [2020-10-12 09:55:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2020-10-12 09:55:38,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:38,258 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:38,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:55:38,258 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:38,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:38,259 INFO L82 PathProgramCache]: Analyzing trace with hash 658938530, now seen corresponding path program 34 times [2020-10-12 09:55:38,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:38,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278728451] [2020-10-12 09:55:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:38,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:43,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 651 [2020-10-12 09:55:43,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:43,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-12 09:55:43,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:43,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:55:43,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-12 09:55:43,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:55:43,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0