/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:34:43,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:34:43,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:34:43,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:34:43,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:34:43,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:34:43,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:34:43,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:34:43,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:34:43,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:34:43,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:34:43,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:34:43,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:34:43,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:34:43,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:34:43,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:34:43,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:34:43,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:34:43,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:34:43,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:34:43,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:34:43,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:34:43,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:34:43,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:34:43,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:34:43,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:34:43,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:34:43,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:34:43,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:34:43,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:34:43,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:34:43,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:34:43,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:34:43,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:34:43,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:34:43,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:34:43,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:34:43,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:34:43,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:34:43,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:34:43,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:34:43,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 09:34:43,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:34:43,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:34:43,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:34:43,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:34:43,548 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:34:43,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:34:43,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:34:43,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:34:43,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:34:43,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:34:43,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:34:43,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:34:43,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:34:43,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:34:43,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:34:43,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:34:43,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:34:43,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:34:43,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:34:43,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:34:43,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:34:43,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:34:43,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:34:43,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:34:43,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:34:43,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:34:43,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:34:43,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:34:43,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:34:43,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:34:43,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:34:43,893 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:34:43,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:34:43,902 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:34:43,902 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:34:43,903 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-14 09:34:43,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c00d706d/fd31521818eb4a15ae352814fb19c391/FLAGe003f78ef [2020-10-14 09:34:44,608 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:34:44,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-14 09:34:44,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c00d706d/fd31521818eb4a15ae352814fb19c391/FLAGe003f78ef [2020-10-14 09:34:44,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c00d706d/fd31521818eb4a15ae352814fb19c391 [2020-10-14 09:34:44,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:34:44,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:34:44,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:34:44,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:34:44,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:34:44,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:34:44" (1/1) ... [2020-10-14 09:34:44,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5cffe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:44, skipping insertion in model container [2020-10-14 09:34:44,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:34:44" (1/1) ... [2020-10-14 09:34:44,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:34:45,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:34:46,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:34:46,043 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:34:46,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:34:46,716 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:34:46,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46 WrapperNode [2020-10-14 09:34:46,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:34:46,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:34:46,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:34:46,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:34:46,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46" (1/1) ... [2020-10-14 09:34:46,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46" (1/1) ... [2020-10-14 09:34:46,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46" (1/1) ... [2020-10-14 09:34:46,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46" (1/1) ... [2020-10-14 09:34:46,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46" (1/1) ... [2020-10-14 09:34:46,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46" (1/1) ... [2020-10-14 09:34:46,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46" (1/1) ... [2020-10-14 09:34:46,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:34:46,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:34:46,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:34:46,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:34:46,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:34:47,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:34:47,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:34:47,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:34:47,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:34:47,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:34:47,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:34:47,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:34:47,006 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:34:47,006 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:34:47,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:34:47,006 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:34:47,006 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:34:47,007 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:34:47,007 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:34:47,007 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:34:47,007 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:34:47,007 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:34:47,008 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:34:47,008 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:34:47,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:34:47,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:34:49,400 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:34:49,400 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:34:49,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:34:49 BoogieIcfgContainer [2020-10-14 09:34:49,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:34:49,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:34:49,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:34:49,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:34:49,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:34:44" (1/3) ... [2020-10-14 09:34:49,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0df382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:34:49, skipping insertion in model container [2020-10-14 09:34:49,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:46" (2/3) ... [2020-10-14 09:34:49,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0df382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:34:49, skipping insertion in model container [2020-10-14 09:34:49,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:34:49" (3/3) ... [2020-10-14 09:34:49,420 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-14 09:34:49,431 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:34:49,441 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:34:49,455 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:34:49,483 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:34:49,483 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:34:49,483 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:34:49,483 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:34:49,484 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:34:49,484 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:34:49,484 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:34:49,484 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:34:49,518 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states. [2020-10-14 09:34:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-14 09:34:49,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:34:49,557 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:34:49,557 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:34:49,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:34:49,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1803942302, now seen corresponding path program 1 times [2020-10-14 09:34:49,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:34:49,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687411445] [2020-10-14 09:34:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:34:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:51,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:52,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:52,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:53,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:53,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:53,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:53,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:53,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:54,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:54,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:55,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:55,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-14 09:34:55,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 09:34:55,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 09:34:55,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:55,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:55,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:34:55,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-14 09:34:55,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-14 09:34:55,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:34:56,359 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:34:56,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:34:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:56,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:56,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:56,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:34:56,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:34:56,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-14 09:34:56,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:56,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:56,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:34:56,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:34:56,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:34:56,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:34:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:34:56,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687411445] [2020-10-14 09:34:56,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:34:56,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:34:56,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883093906] [2020-10-14 09:34:56,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:34:56,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:34:56,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:34:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:34:56,659 INFO L87 Difference]: Start difference. First operand 776 states. Second operand 4 states. [2020-10-14 09:34:57,232 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-14 09:35:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:35:02,237 INFO L93 Difference]: Finished difference Result 1452 states and 2559 transitions. [2020-10-14 09:35:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:35:02,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-10-14 09:35:02,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:35:02,272 INFO L225 Difference]: With dead ends: 1452 [2020-10-14 09:35:02,272 INFO L226 Difference]: Without dead ends: 1246 [2020-10-14 09:35:02,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:35:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2020-10-14 09:35:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1244. [2020-10-14 09:35:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2020-10-14 09:35:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1943 transitions. [2020-10-14 09:35:02,436 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1943 transitions. Word has length 320 [2020-10-14 09:35:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:35:02,438 INFO L479 AbstractCegarLoop]: Abstraction has 1244 states and 1943 transitions. [2020-10-14 09:35:02,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:35:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1943 transitions. [2020-10-14 09:35:02,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-14 09:35:02,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:35:02,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:35:02,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:35:02,449 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:35:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:35:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash -193996828, now seen corresponding path program 1 times [2020-10-14 09:35:02,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:35:02,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45500249] [2020-10-14 09:35:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:35:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:03,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:03,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:04,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:04,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:04,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:04,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:05,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:05,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:05,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:05,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:05,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:05,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:05,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:07,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:07,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-14 09:35:07,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 09:35:07,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 09:35:07,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:07,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:07,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:35:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-14 09:35:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-14 09:35:07,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:35:08,494 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:35:08,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:35:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:08,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:08,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:08,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:35:08,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:35:08,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 09:35:08,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:08,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:35:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:35:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:35:08,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:35:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:35:08,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45500249] [2020-10-14 09:35:08,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:35:08,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:35:08,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517139027] [2020-10-14 09:35:08,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:35:08,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:35:08,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:35:08,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:35:08,744 INFO L87 Difference]: Start difference. First operand 1244 states and 1943 transitions. Second operand 4 states. [2020-10-14 09:35:09,519 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-14 09:35:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:35:13,866 INFO L93 Difference]: Finished difference Result 2536 states and 3994 transitions. [2020-10-14 09:35:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:35:13,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-10-14 09:35:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:35:13,884 INFO L225 Difference]: With dead ends: 2536 [2020-10-14 09:35:13,884 INFO L226 Difference]: Without dead ends: 2172 [2020-10-14 09:35:13,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:35:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2020-10-14 09:35:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2170. [2020-10-14 09:35:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2170 states. [2020-10-14 09:35:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3383 transitions. [2020-10-14 09:35:13,984 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3383 transitions. Word has length 320 [2020-10-14 09:35:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:35:13,986 INFO L479 AbstractCegarLoop]: Abstraction has 2170 states and 3383 transitions. [2020-10-14 09:35:13,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:35:13,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3383 transitions. [2020-10-14 09:35:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-14 09:35:13,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:35:13,995 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:35:13,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:35:13,996 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:35:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:35:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1008356965, now seen corresponding path program 1 times [2020-10-14 09:35:13,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:35:13,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082051787] [2020-10-14 09:35:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:35:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:14,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:14,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:15,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:15,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:15,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:15,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:15,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:16,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:16,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:16,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:16,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:16,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:18,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:18,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:19,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:19,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-14 09:35:19,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:35:19,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-14 09:35:19,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:19,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:19,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:35:19,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-14 09:35:19,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-14 09:35:19,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:35:19,891 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:35:19,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:35:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:19,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:19,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:35:19,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:35:19,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-14 09:35:19,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:19,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:19,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:35:19,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:35:19,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:35:19,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:35:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:35:20,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082051787] [2020-10-14 09:35:20,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:35:20,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:35:20,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139772015] [2020-10-14 09:35:20,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:35:20,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:35:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:35:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:35:20,223 INFO L87 Difference]: Start difference. First operand 2170 states and 3383 transitions. Second operand 4 states. [2020-10-14 09:35:20,874 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-14 09:35:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:35:25,559 INFO L93 Difference]: Finished difference Result 4670 states and 7345 transitions. [2020-10-14 09:35:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:35:25,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-10-14 09:35:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:35:25,579 INFO L225 Difference]: With dead ends: 4670 [2020-10-14 09:35:25,580 INFO L226 Difference]: Without dead ends: 3988 [2020-10-14 09:35:25,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:35:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2020-10-14 09:35:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 3986. [2020-10-14 09:35:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3986 states. [2020-10-14 09:35:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 6199 transitions. [2020-10-14 09:35:25,712 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 6199 transitions. Word has length 320 [2020-10-14 09:35:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:35:25,713 INFO L479 AbstractCegarLoop]: Abstraction has 3986 states and 6199 transitions. [2020-10-14 09:35:25,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:35:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 6199 transitions. [2020-10-14 09:35:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-14 09:35:25,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:35:25,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:35:25,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:35:25,725 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:35:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:35:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1005553859, now seen corresponding path program 1 times [2020-10-14 09:35:25,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:35:25,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829227648] [2020-10-14 09:35:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:35:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:26,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:26,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:26,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:26,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:27,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:27,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:27,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:27,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:27,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:27,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:27,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:27,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:28,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:29,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:29,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:30,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:30,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-14 09:35:30,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:35:30,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:35:30,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:30,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:30,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:35:30,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-14 09:35:30,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 231 [2020-10-14 09:35:30,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:35:31,460 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:35:31,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:35:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:31,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:31,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:31,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:35:31,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:35:31,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 09:35:31,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:31,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:31,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:35:31,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:35:31,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:35:31,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:35:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:35:31,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829227648] [2020-10-14 09:35:31,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:35:31,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:35:31,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529633929] [2020-10-14 09:35:31,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:35:31,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:35:31,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:35:31,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:35:31,709 INFO L87 Difference]: Start difference. First operand 3986 states and 6199 transitions. Second operand 4 states. [2020-10-14 09:35:32,131 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-14 09:35:35,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:35:35,984 INFO L93 Difference]: Finished difference Result 8822 states and 13845 transitions. [2020-10-14 09:35:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:35:35,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-10-14 09:35:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:35:36,022 INFO L225 Difference]: With dead ends: 8822 [2020-10-14 09:35:36,022 INFO L226 Difference]: Without dead ends: 7548 [2020-10-14 09:35:36,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:35:36,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7548 states. [2020-10-14 09:35:36,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7548 to 7546. [2020-10-14 09:35:36,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7546 states. [2020-10-14 09:35:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7546 states to 7546 states and 11703 transitions. [2020-10-14 09:35:36,325 INFO L78 Accepts]: Start accepts. Automaton has 7546 states and 11703 transitions. Word has length 320 [2020-10-14 09:35:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:35:36,326 INFO L479 AbstractCegarLoop]: Abstraction has 7546 states and 11703 transitions. [2020-10-14 09:35:36,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:35:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 7546 states and 11703 transitions. [2020-10-14 09:35:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-14 09:35:36,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:35:36,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:35:36,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:35:36,342 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:35:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:35:36,343 INFO L82 PathProgramCache]: Analyzing trace with hash -314024100, now seen corresponding path program 1 times [2020-10-14 09:35:36,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:35:36,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386860994] [2020-10-14 09:35:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:35:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:36,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:37,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:37,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:37,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:37,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:38,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:38,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:38,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:38,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:38,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:38,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:38,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:38,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:41,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:41,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-14 09:35:41,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 09:35:41,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:35:41,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:41,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:35:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:35:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-14 09:35:41,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:35:42,199 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:35:42,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:35:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:42,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:42,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:42,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:35:42,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:35:42,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:35:42,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:42,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:35:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:35:42,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:35:42,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:35:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:35:42,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386860994] [2020-10-14 09:35:42,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:35:42,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:35:42,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248649436] [2020-10-14 09:35:42,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:35:42,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:35:42,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:35:42,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:35:42,369 INFO L87 Difference]: Start difference. First operand 7546 states and 11703 transitions. Second operand 5 states. [2020-10-14 09:35:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:35:49,476 INFO L93 Difference]: Finished difference Result 22386 states and 34684 transitions. [2020-10-14 09:35:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:35:49,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2020-10-14 09:35:49,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:35:49,554 INFO L225 Difference]: With dead ends: 22386 [2020-10-14 09:35:49,554 INFO L226 Difference]: Without dead ends: 14853 [2020-10-14 09:35:49,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:35:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14853 states. [2020-10-14 09:35:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14853 to 14851. [2020-10-14 09:35:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14851 states. [2020-10-14 09:35:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14851 states to 14851 states and 22908 transitions. [2020-10-14 09:35:50,087 INFO L78 Accepts]: Start accepts. Automaton has 14851 states and 22908 transitions. Word has length 320 [2020-10-14 09:35:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:35:50,087 INFO L479 AbstractCegarLoop]: Abstraction has 14851 states and 22908 transitions. [2020-10-14 09:35:50,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:35:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 14851 states and 22908 transitions. [2020-10-14 09:35:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-14 09:35:50,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:35:50,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:35:50,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:35:50,117 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:35:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:35:50,117 INFO L82 PathProgramCache]: Analyzing trace with hash 456549240, now seen corresponding path program 1 times [2020-10-14 09:35:50,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:35:50,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692627582] [2020-10-14 09:35:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:35:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:50,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:50,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:50,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:50,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:50,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:51,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:51,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:51,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:51,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:51,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:51,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:51,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:53,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:53,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:55,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:55,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-14 09:35:55,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 09:35:55,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-14 09:35:55,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:55,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:55,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:35:55,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:35:55,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-14 09:35:55,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:55,791 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:35:55,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:35:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:55,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:55,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:55,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:35:55,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:35:55,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:35:55,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:55,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:35:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:35:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:35:55,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:35:55,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692627582] [2020-10-14 09:35:55,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:35:55,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:35:55,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127226851] [2020-10-14 09:35:55,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:35:55,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:35:55,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:35:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:35:55,940 INFO L87 Difference]: Start difference. First operand 14851 states and 22908 transitions. Second operand 4 states. [2020-10-14 09:36:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:03,926 INFO L93 Difference]: Finished difference Result 43781 states and 67419 transitions. [2020-10-14 09:36:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:36:03,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-10-14 09:36:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:04,008 INFO L225 Difference]: With dead ends: 43781 [2020-10-14 09:36:04,008 INFO L226 Difference]: Without dead ends: 29070 [2020-10-14 09:36:04,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29070 states. [2020-10-14 09:36:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29070 to 29068. [2020-10-14 09:36:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29068 states. [2020-10-14 09:36:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29068 states to 29068 states and 44546 transitions. [2020-10-14 09:36:05,106 INFO L78 Accepts]: Start accepts. Automaton has 29068 states and 44546 transitions. Word has length 322 [2020-10-14 09:36:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:05,106 INFO L479 AbstractCegarLoop]: Abstraction has 29068 states and 44546 transitions. [2020-10-14 09:36:05,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:36:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 29068 states and 44546 transitions. [2020-10-14 09:36:05,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-14 09:36:05,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:05,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:05,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:36:05,160 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash 330888893, now seen corresponding path program 1 times [2020-10-14 09:36:05,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:05,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296973092] [2020-10-14 09:36:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:05,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:05,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:07,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:07,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:07,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:07,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:10,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:10,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-14 09:36:10,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:36:10,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-14 09:36:10,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:10,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:10,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:36:10,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:36:10,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:36:10,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:10,668 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:36:10,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:10,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:10,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:10,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:10,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:10,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:36:10,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:10,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:10,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:10,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:10,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:10,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:10,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296973092] [2020-10-14 09:36:10,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:10,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:36:10,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476078803] [2020-10-14 09:36:10,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:36:10,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:10,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:36:10,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:10,776 INFO L87 Difference]: Start difference. First operand 29068 states and 44546 transitions. Second operand 4 states. [2020-10-14 09:36:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:15,763 INFO L93 Difference]: Finished difference Result 87045 states and 133362 transitions. [2020-10-14 09:36:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:36:15,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-10-14 09:36:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:15,883 INFO L225 Difference]: With dead ends: 87045 [2020-10-14 09:36:15,883 INFO L226 Difference]: Without dead ends: 58004 [2020-10-14 09:36:15,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58004 states. [2020-10-14 09:36:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58004 to 29079. [2020-10-14 09:36:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29079 states. [2020-10-14 09:36:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29079 states to 29079 states and 44561 transitions. [2020-10-14 09:36:17,062 INFO L78 Accepts]: Start accepts. Automaton has 29079 states and 44561 transitions. Word has length 322 [2020-10-14 09:36:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:17,063 INFO L479 AbstractCegarLoop]: Abstraction has 29079 states and 44561 transitions. [2020-10-14 09:36:17,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:36:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 29079 states and 44561 transitions. [2020-10-14 09:36:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-14 09:36:17,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:17,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:17,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:36:17,114 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1287388665, now seen corresponding path program 1 times [2020-10-14 09:36:17,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:17,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658439363] [2020-10-14 09:36:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:17,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:17,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:17,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:17,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:17,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:17,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:17,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:17,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:17,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:18,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:18,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:18,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:18,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:18,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:18,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:22,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:22,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-14 09:36:22,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:36:22,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-14 09:36:22,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:22,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:36:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:36:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:36:22,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:22,759 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:36:22,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:22,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:22,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:22,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:22,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:22,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:36:22,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:22,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:22,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:22,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:22,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:36:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:22,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658439363] [2020-10-14 09:36:22,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:22,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:36:22,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021757041] [2020-10-14 09:36:22,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:36:22,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:22,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:36:22,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:22,846 INFO L87 Difference]: Start difference. First operand 29079 states and 44561 transitions. Second operand 4 states. [2020-10-14 09:36:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:32,020 INFO L93 Difference]: Finished difference Result 87142 states and 133529 transitions. [2020-10-14 09:36:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:36:32,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 323 [2020-10-14 09:36:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:32,096 INFO L225 Difference]: With dead ends: 87142 [2020-10-14 09:36:32,096 INFO L226 Difference]: Without dead ends: 58113 [2020-10-14 09:36:32,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58113 states. [2020-10-14 09:36:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58113 to 29095. [2020-10-14 09:36:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29095 states. [2020-10-14 09:36:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29095 states to 29095 states and 44580 transitions. [2020-10-14 09:36:33,122 INFO L78 Accepts]: Start accepts. Automaton has 29095 states and 44580 transitions. Word has length 323 [2020-10-14 09:36:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:33,122 INFO L479 AbstractCegarLoop]: Abstraction has 29095 states and 44580 transitions. [2020-10-14 09:36:33,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:36:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 29095 states and 44580 transitions. [2020-10-14 09:36:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-14 09:36:33,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:33,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:33,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:36:33,151 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash 57170739, now seen corresponding path program 1 times [2020-10-14 09:36:33,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:33,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37011979] [2020-10-14 09:36:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:33,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:33,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:33,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:33,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:33,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:38,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:38,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-14 09:36:38,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 09:36:38,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 09:36:38,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:38,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:38,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:36:38,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 09:36:38,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-14 09:36:38,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:38,733 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:36:38,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:38,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:38,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:38,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:38,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:38,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:36:38,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:38,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:38,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:38,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:38,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:38,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:38,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37011979] [2020-10-14 09:36:38,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:38,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:36:38,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942293931] [2020-10-14 09:36:38,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:36:38,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:38,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:36:38,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:38,879 INFO L87 Difference]: Start difference. First operand 29095 states and 44580 transitions. Second operand 4 states. [2020-10-14 09:36:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:47,911 INFO L93 Difference]: Finished difference Result 82620 states and 126381 transitions. [2020-10-14 09:36:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:36:47,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-10-14 09:36:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:47,998 INFO L225 Difference]: With dead ends: 82620 [2020-10-14 09:36:47,999 INFO L226 Difference]: Without dead ends: 53722 [2020-10-14 09:36:48,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53722 states. [2020-10-14 09:36:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53722 to 53720. [2020-10-14 09:36:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53720 states. [2020-10-14 09:36:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53720 states to 53720 states and 81708 transitions. [2020-10-14 09:36:50,160 INFO L78 Accepts]: Start accepts. Automaton has 53720 states and 81708 transitions. Word has length 324 [2020-10-14 09:36:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:50,160 INFO L479 AbstractCegarLoop]: Abstraction has 53720 states and 81708 transitions. [2020-10-14 09:36:50,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:36:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53720 states and 81708 transitions. [2020-10-14 09:36:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-14 09:36:50,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:50,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:50,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:36:50,200 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1295889360, now seen corresponding path program 1 times [2020-10-14 09:36:50,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:50,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971330047] [2020-10-14 09:36:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:50,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:50,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:50,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:52,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:52,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:52,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:54,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:54,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:54,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:55,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:55,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-14 09:36:55,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 09:36:55,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:36:55,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:55,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:36:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:36:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-14 09:36:55,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:55,855 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:36:55,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:55,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:55,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:55,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:55,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:55,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:36:55,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:55,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:55,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:55,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:55,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:55,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:56,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971330047] [2020-10-14 09:36:56,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:56,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:36:56,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286536004] [2020-10-14 09:36:56,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:36:56,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:56,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:36:56,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:36:56,018 INFO L87 Difference]: Start difference. First operand 53720 states and 81708 transitions. Second operand 5 states. [2020-10-14 09:37:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:37:06,448 INFO L93 Difference]: Finished difference Result 158977 states and 241405 transitions. [2020-10-14 09:37:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:37:06,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-10-14 09:37:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:37:06,584 INFO L225 Difference]: With dead ends: 158977 [2020-10-14 09:37:06,584 INFO L226 Difference]: Without dead ends: 105531 [2020-10-14 09:37:06,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:37:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105531 states. [2020-10-14 09:37:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105531 to 105529. [2020-10-14 09:37:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105529 states. [2020-10-14 09:37:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105529 states to 105529 states and 159511 transitions. [2020-10-14 09:37:12,322 INFO L78 Accepts]: Start accepts. Automaton has 105529 states and 159511 transitions. Word has length 324 [2020-10-14 09:37:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:37:12,323 INFO L479 AbstractCegarLoop]: Abstraction has 105529 states and 159511 transitions. [2020-10-14 09:37:12,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:37:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 105529 states and 159511 transitions. [2020-10-14 09:37:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-14 09:37:12,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:37:12,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:37:12,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:37:12,411 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:37:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:37:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1155093286, now seen corresponding path program 1 times [2020-10-14 09:37:12,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:37:12,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479069579] [2020-10-14 09:37:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:37:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:12,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:12,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:12,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:12,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:13,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:13,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:13,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:13,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:13,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:13,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:13,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:14,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:14,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:14,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:14,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:17,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:17,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-14 09:37:17,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:37:17,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 09:37:17,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:17,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:17,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:37:17,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:37:17,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-14 09:37:17,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:17,976 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:37:17,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:37:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:17,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:17,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:17,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:37:17,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:37:17,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:37:17,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:17,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:17,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:37:17,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:37:17,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:37:17,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:37:18,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479069579] [2020-10-14 09:37:18,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:37:18,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:37:18,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243518347] [2020-10-14 09:37:18,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:37:18,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:37:18,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:37:18,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:18,103 INFO L87 Difference]: Start difference. First operand 105529 states and 159511 transitions. Second operand 4 states. [2020-10-14 09:37:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:37:33,427 INFO L93 Difference]: Finished difference Result 311677 states and 470314 transitions. [2020-10-14 09:37:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:37:33,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-10-14 09:37:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:37:33,705 INFO L225 Difference]: With dead ends: 311677 [2020-10-14 09:37:33,705 INFO L226 Difference]: Without dead ends: 206563 [2020-10-14 09:37:33,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206563 states. [2020-10-14 09:37:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206563 to 206561. [2020-10-14 09:37:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206561 states. [2020-10-14 09:37:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206561 states to 206561 states and 309958 transitions. [2020-10-14 09:37:47,554 INFO L78 Accepts]: Start accepts. Automaton has 206561 states and 309958 transitions. Word has length 326 [2020-10-14 09:37:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:37:47,554 INFO L479 AbstractCegarLoop]: Abstraction has 206561 states and 309958 transitions. [2020-10-14 09:37:47,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:37:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 206561 states and 309958 transitions. [2020-10-14 09:37:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-14 09:37:47,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:37:47,700 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:37:47,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:37:47,700 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:37:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:37:47,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2066665891, now seen corresponding path program 1 times [2020-10-14 09:37:47,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:37:47,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4225836] [2020-10-14 09:37:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:37:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:49,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:49,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:50,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:50,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:50,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:52,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:52,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-14 09:37:52,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 09:37:52,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 09:37:52,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:52,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:52,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:37:52,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:37:52,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-14 09:37:52,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:53,373 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:37:53,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:37:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:53,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:53,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:53,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:37:53,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:37:53,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:37:53,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:53,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:53,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:37:53,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:37:53,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:37:53,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:37:55,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4225836] [2020-10-14 09:37:55,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:37:55,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:37:55,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419109176] [2020-10-14 09:37:55,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:37:55,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:37:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:37:55,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:37:55,684 INFO L87 Difference]: Start difference. First operand 206561 states and 309958 transitions. Second operand 5 states.