/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:36:26,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:36:26,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:36:26,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:36:26,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:36:26,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:36:26,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:36:26,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:36:26,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:36:26,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:36:26,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:36:26,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:36:26,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:36:26,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:36:26,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:36:26,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:36:26,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:36:26,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:36:26,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:36:26,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:36:26,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:36:26,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:36:26,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:36:26,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:36:26,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:36:26,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:36:26,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:36:26,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:36:26,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:36:26,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:36:26,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:36:26,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:36:26,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:36:26,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:36:26,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:36:26,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:36:26,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:36:26,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:36:26,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:36:26,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:36:26,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:36:26,576 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 [2020-10-29 13:36:26,624 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:36:26,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:36:26,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:36:26,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:36:26,629 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:36:26,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:36:26,629 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:36:26,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:36:26,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:36:26,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:36:26,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:36:26,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:36:26,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:36:26,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:36:26,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:36:26,632 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:36:26,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:36:26,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:36:26,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:36:26,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:36:26,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:36:26,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:36:26,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:36:26,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:36:26,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:36:26,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:36:26,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:36:26,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:36:26,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:36:26,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:36:27,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:36:27,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:36:27,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:36:27,096 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:36:27,097 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:36:27,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:36:27,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1de622b5/15eb374997294badad26a987fd94adfb/FLAG7d658ac75 [2020-10-29 13:36:28,119 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:36:28,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:36:28,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1de622b5/15eb374997294badad26a987fd94adfb/FLAG7d658ac75 [2020-10-29 13:36:28,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1de622b5/15eb374997294badad26a987fd94adfb [2020-10-29 13:36:28,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:36:28,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:36:28,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:36:28,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:36:28,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:36:28,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:36:28" (1/1) ... [2020-10-29 13:36:28,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1de6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:28, skipping insertion in model container [2020-10-29 13:36:28,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:36:28" (1/1) ... [2020-10-29 13:36:28,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:36:28,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:36:29,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:36:29,877 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:36:30,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:36:30,272 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:36:30,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30 WrapperNode [2020-10-29 13:36:30,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:36:30,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:36:30,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:36:30,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:36:30,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30" (1/1) ... [2020-10-29 13:36:30,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30" (1/1) ... [2020-10-29 13:36:30,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30" (1/1) ... [2020-10-29 13:36:30,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30" (1/1) ... [2020-10-29 13:36:30,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30" (1/1) ... [2020-10-29 13:36:30,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30" (1/1) ... [2020-10-29 13:36:30,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30" (1/1) ... [2020-10-29 13:36:30,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:36:30,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:36:30,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:36:30,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:36:30,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30" (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 [2020-10-29 13:36:30,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:36:30,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:36:30,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:36:30,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:36:30,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:36:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:36:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:36:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:36:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:36:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:36:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:36:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:36:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:36:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:36:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:36:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:36:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:36:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:36:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:36:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:36:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:36:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:36:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:36:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:36:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:36:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:36:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:36:34,446 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:36:34,447 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:36:34,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:36:34 BoogieIcfgContainer [2020-10-29 13:36:34,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:36:34,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:36:34,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:36:34,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:36:34,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:36:28" (1/3) ... [2020-10-29 13:36:34,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227f183f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:36:34, skipping insertion in model container [2020-10-29 13:36:34,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:30" (2/3) ... [2020-10-29 13:36:34,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227f183f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:36:34, skipping insertion in model container [2020-10-29 13:36:34,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:36:34" (3/3) ... [2020-10-29 13:36:34,464 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:36:34,478 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:36:34,485 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:36:34,499 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:36:34,535 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:36:34,536 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:36:34,536 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:36:34,536 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:36:34,536 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:36:34,536 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:36:34,536 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:36:34,537 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:36:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states. [2020-10-29 13:36:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:36:34,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:34,598 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] [2020-10-29 13:36:34,599 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash 273753204, now seen corresponding path program 1 times [2020-10-29 13:36:34,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:34,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731035379] [2020-10-29 13:36:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:35,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:35,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:35,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:36,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:38,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:40,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:40,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:36:40,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:36:40,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 13:36:40,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:40,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:36:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:36:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:36:40,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:36:41,994 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:36:41,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:42,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:42,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:42,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:42,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 13:36:42,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:42,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:42,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:42,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:42,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:36:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:42,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731035379] [2020-10-29 13:36:42,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:42,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:36:42,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058064068] [2020-10-29 13:36:42,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:36:42,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:42,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:36:42,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:42,141 INFO L87 Difference]: Start difference. First operand 1299 states. Second operand 6 states. [2020-10-29 13:36:44,248 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:36:57,550 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 531 [2020-10-29 13:37:03,738 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:37:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:04,160 INFO L93 Difference]: Finished difference Result 3524 states and 6024 transitions. [2020-10-29 13:37:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:37:04,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:37:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:04,204 INFO L225 Difference]: With dead ends: 3524 [2020-10-29 13:37:04,205 INFO L226 Difference]: Without dead ends: 2449 [2020-10-29 13:37:04,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:37:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2020-10-29 13:37:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 2285. [2020-10-29 13:37:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2285 states. [2020-10-29 13:37:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 2985 transitions. [2020-10-29 13:37:04,450 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 2985 transitions. Word has length 57 [2020-10-29 13:37:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:04,451 INFO L481 AbstractCegarLoop]: Abstraction has 2285 states and 2985 transitions. [2020-10-29 13:37:04,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 2985 transitions. [2020-10-29 13:37:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:37:04,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:04,458 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] [2020-10-29 13:37:04,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:37:04,459 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:04,460 INFO L82 PathProgramCache]: Analyzing trace with hash 919223166, now seen corresponding path program 1 times [2020-10-29 13:37:04,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:04,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066786699] [2020-10-29 13:37:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:04,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:04,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:04,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:04,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:05,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:06,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:09,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:09,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:37:09,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:37:09,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:37:09,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:09,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:09,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:09,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:37:09,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:37:09,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:11,468 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:37:11,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:11,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:11,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:11,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:11,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:11,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-29 13:37:11,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:11,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:11,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:11,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066786699] [2020-10-29 13:37:11,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:11,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:37:11,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124218165] [2020-10-29 13:37:11,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:11,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:11,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:11,585 INFO L87 Difference]: Start difference. First operand 2285 states and 2985 transitions. Second operand 6 states. [2020-10-29 13:37:13,492 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:37:26,376 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 531 [2020-10-29 13:37:28,657 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:37:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:29,041 INFO L93 Difference]: Finished difference Result 2594 states and 3436 transitions. [2020-10-29 13:37:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:37:29,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-29 13:37:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:29,058 INFO L225 Difference]: With dead ends: 2594 [2020-10-29 13:37:29,058 INFO L226 Difference]: Without dead ends: 2443 [2020-10-29 13:37:29,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:37:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2020-10-29 13:37:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2275. [2020-10-29 13:37:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2020-10-29 13:37:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 2970 transitions. [2020-10-29 13:37:29,158 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 2970 transitions. Word has length 58 [2020-10-29 13:37:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:29,159 INFO L481 AbstractCegarLoop]: Abstraction has 2275 states and 2970 transitions. [2020-10-29 13:37:29,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 2970 transitions. [2020-10-29 13:37:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:37:29,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:29,165 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] [2020-10-29 13:37:29,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:37:29,165 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:29,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:29,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1320308122, now seen corresponding path program 1 times [2020-10-29 13:37:29,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:29,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693667922] [2020-10-29 13:37:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:29,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:29,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:29,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:32,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:32,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:32,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:33,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:33,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:34,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:34,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:37:34,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:37:34,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:37:34,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:34,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:34,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:37:34,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:37:34,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:36,191 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:37:36,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:36,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:36,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:36,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:36,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:36,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 13:37:36,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:36,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:36,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:36,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:36,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:36,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:36,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693667922] [2020-10-29 13:37:36,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:36,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:37:36,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050533338] [2020-10-29 13:37:36,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:36,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:36,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:36,284 INFO L87 Difference]: Start difference. First operand 2275 states and 2970 transitions. Second operand 6 states. [2020-10-29 13:37:38,157 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:37:46,190 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 531 [2020-10-29 13:37:50,565 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:37:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:51,597 INFO L93 Difference]: Finished difference Result 4969 states and 6807 transitions. [2020-10-29 13:37:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:37:51,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-29 13:37:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:51,618 INFO L225 Difference]: With dead ends: 4969 [2020-10-29 13:37:51,618 INFO L226 Difference]: Without dead ends: 4006 [2020-10-29 13:37:51,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:37:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2020-10-29 13:37:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 3481. [2020-10-29 13:37:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3481 states. [2020-10-29 13:37:51,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 4663 transitions. [2020-10-29 13:37:51,782 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 4663 transitions. Word has length 58 [2020-10-29 13:37:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:51,782 INFO L481 AbstractCegarLoop]: Abstraction has 3481 states and 4663 transitions. [2020-10-29 13:37:51,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:51,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 4663 transitions. [2020-10-29 13:37:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:37:51,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:51,788 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] [2020-10-29 13:37:51,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:37:51,788 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:51,789 INFO L82 PathProgramCache]: Analyzing trace with hash 304606119, now seen corresponding path program 1 times [2020-10-29 13:37:51,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:51,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017789319] [2020-10-29 13:37:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:51,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:52,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:52,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:52,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:56,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:56,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:37:56,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:37:56,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:37:56,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:56,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:56,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:37:56,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:37:56,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:37:56,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:59,001 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:37:59,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:59,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:59,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:59,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:59,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:59,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:37:59,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:59,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:59,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:59,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:59,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:59,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:59,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017789319] [2020-10-29 13:37:59,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:59,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:37:59,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726940630] [2020-10-29 13:37:59,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:37:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:37:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:37:59,083 INFO L87 Difference]: Start difference. First operand 3481 states and 4663 transitions. Second operand 9 states. [2020-10-29 13:38:01,174 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-29 13:38:09,457 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 538 [2020-10-29 13:38:11,953 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 539 [2020-10-29 13:38:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:14,035 INFO L93 Difference]: Finished difference Result 7655 states and 11121 transitions. [2020-10-29 13:38:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:38:14,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-29 13:38:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:14,078 INFO L225 Difference]: With dead ends: 7655 [2020-10-29 13:38:14,078 INFO L226 Difference]: Without dead ends: 7650 [2020-10-29 13:38:14,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:38:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2020-10-29 13:38:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 3478. [2020-10-29 13:38:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3478 states. [2020-10-29 13:38:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 4658 transitions. [2020-10-29 13:38:14,313 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 4658 transitions. Word has length 58 [2020-10-29 13:38:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:14,314 INFO L481 AbstractCegarLoop]: Abstraction has 3478 states and 4658 transitions. [2020-10-29 13:38:14,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:38:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 4658 transitions. [2020-10-29 13:38:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:38:14,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:14,319 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] [2020-10-29 13:38:14,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:38:14,320 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:14,320 INFO L82 PathProgramCache]: Analyzing trace with hash 150911763, now seen corresponding path program 1 times [2020-10-29 13:38:14,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:14,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542814429] [2020-10-29 13:38:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:14,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:14,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:14,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:14,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:15,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:16,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:16,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:16,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:16,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:16,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:19,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:19,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:38:19,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:38:19,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:38:19,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:19,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:38:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:38:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:38:19,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:21,552 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:38:21,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:21,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:21,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:21,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:21,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-29 13:38:21,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:21,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:21,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:21,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:21,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:21,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:38:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:21,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542814429] [2020-10-29 13:38:21,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:21,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:38:21,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106194551] [2020-10-29 13:38:21,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:38:21,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:21,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:38:21,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:38:21,671 INFO L87 Difference]: Start difference. First operand 3478 states and 4658 transitions. Second operand 8 states. [2020-10-29 13:38:23,532 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:38:32,807 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-29 13:38:36,847 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-29 13:38:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:37,976 INFO L93 Difference]: Finished difference Result 11370 states and 16428 transitions. [2020-10-29 13:38:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 13:38:37,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-29 13:38:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:38,024 INFO L225 Difference]: With dead ends: 11370 [2020-10-29 13:38:38,024 INFO L226 Difference]: Without dead ends: 10225 [2020-10-29 13:38:38,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:38:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10225 states. [2020-10-29 13:38:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10225 to 6018. [2020-10-29 13:38:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6018 states. [2020-10-29 13:38:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6018 states to 6018 states and 8357 transitions. [2020-10-29 13:38:38,517 INFO L78 Accepts]: Start accepts. Automaton has 6018 states and 8357 transitions. Word has length 59 [2020-10-29 13:38:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:38,518 INFO L481 AbstractCegarLoop]: Abstraction has 6018 states and 8357 transitions. [2020-10-29 13:38:38,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:38:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 6018 states and 8357 transitions. [2020-10-29 13:38:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:38:38,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:38,524 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] [2020-10-29 13:38:38,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:38:38,524 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:38,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2097672199, now seen corresponding path program 1 times [2020-10-29 13:38:38,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:38,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067264818] [2020-10-29 13:38:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:38,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:38,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:39,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:39,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:40,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:41,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:41,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:41,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:42,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:42,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:43,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:43,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:38:43,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:38:43,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:38:43,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:43,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:38:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:38:43,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:45,457 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:38:45,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:45,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:45,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:45,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:45,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 13:38:45,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:45,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:45,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:38:45,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:45,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067264818] [2020-10-29 13:38:45,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:45,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:38:45,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516811458] [2020-10-29 13:38:45,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:45,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:45,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:45,549 INFO L87 Difference]: Start difference. First operand 6018 states and 8357 transitions. Second operand 6 states. [2020-10-29 13:38:47,481 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-29 13:38:54,219 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:38:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:55,840 INFO L93 Difference]: Finished difference Result 7495 states and 10608 transitions. [2020-10-29 13:38:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:38:55,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-29 13:38:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:55,852 INFO L225 Difference]: With dead ends: 7495 [2020-10-29 13:38:55,853 INFO L226 Difference]: Without dead ends: 3723 [2020-10-29 13:38:55,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:38:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-10-29 13:38:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3717. [2020-10-29 13:38:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3717 states. [2020-10-29 13:38:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5056 transitions. [2020-10-29 13:38:56,083 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5056 transitions. Word has length 60 [2020-10-29 13:38:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:56,084 INFO L481 AbstractCegarLoop]: Abstraction has 3717 states and 5056 transitions. [2020-10-29 13:38:56,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5056 transitions. [2020-10-29 13:38:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:38:56,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:56,088 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] [2020-10-29 13:38:56,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:38:56,089 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:56,089 INFO L82 PathProgramCache]: Analyzing trace with hash -761155748, now seen corresponding path program 1 times [2020-10-29 13:38:56,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:56,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158566537] [2020-10-29 13:38:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:56,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:56,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:56,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:57,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:57,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:57,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:57,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:58,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:58,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:59,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:01,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:39:01,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:39:01,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:39:01,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:01,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:01,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:01,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:39:01,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:03,347 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:39:03,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:03,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:03,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:03,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:03,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:03,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:39:03,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:03,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:03,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:03,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:03,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:03,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:03,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158566537] [2020-10-29 13:39:03,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:03,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:39:03,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689665011] [2020-10-29 13:39:03,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:03,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:03,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:03,435 INFO L87 Difference]: Start difference. First operand 3717 states and 5056 transitions. Second operand 8 states. [2020-10-29 13:39:05,490 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 542 [2020-10-29 13:39:12,769 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 546 [2020-10-29 13:39:15,001 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 538 [2020-10-29 13:39:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:17,602 INFO L93 Difference]: Finished difference Result 10849 states and 15975 transitions. [2020-10-29 13:39:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:39:17,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-29 13:39:17,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:17,645 INFO L225 Difference]: With dead ends: 10849 [2020-10-29 13:39:17,646 INFO L226 Difference]: Without dead ends: 9280 [2020-10-29 13:39:17,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:39:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9280 states. [2020-10-29 13:39:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9280 to 3573. [2020-10-29 13:39:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3573 states. [2020-10-29 13:39:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 4863 transitions. [2020-10-29 13:39:17,997 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 4863 transitions. Word has length 60 [2020-10-29 13:39:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:17,998 INFO L481 AbstractCegarLoop]: Abstraction has 3573 states and 4863 transitions. [2020-10-29 13:39:17,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 4863 transitions. [2020-10-29 13:39:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:39:18,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:18,003 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] [2020-10-29 13:39:18,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:39:18,003 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:18,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1597113963, now seen corresponding path program 1 times [2020-10-29 13:39:18,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:18,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958798279] [2020-10-29 13:39:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:18,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:19,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:20,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:20,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:22,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:22,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:23,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:23,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:39:23,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:39:23,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:39:23,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:23,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:39:23,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:24,963 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:39:24,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:24,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:24,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:24,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:24,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:39:24,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:24,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:24,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:24,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:25,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958798279] [2020-10-29 13:39:25,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:25,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:39:25,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687568628] [2020-10-29 13:39:25,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:25,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:25,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:25,029 INFO L87 Difference]: Start difference. First operand 3573 states and 4863 transitions. Second operand 8 states. [2020-10-29 13:39:27,092 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-29 13:39:34,636 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-29 13:39:37,802 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:39:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:38,392 INFO L93 Difference]: Finished difference Result 4554 states and 6313 transitions. [2020-10-29 13:39:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:39:38,393 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-29 13:39:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:38,402 INFO L225 Difference]: With dead ends: 4554 [2020-10-29 13:39:38,402 INFO L226 Difference]: Without dead ends: 4547 [2020-10-29 13:39:38,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:39:38,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2020-10-29 13:39:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 3573. [2020-10-29 13:39:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3573 states. [2020-10-29 13:39:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 4862 transitions. [2020-10-29 13:39:38,731 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 4862 transitions. Word has length 61 [2020-10-29 13:39:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:38,731 INFO L481 AbstractCegarLoop]: Abstraction has 3573 states and 4862 transitions. [2020-10-29 13:39:38,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 4862 transitions. [2020-10-29 13:39:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 13:39:38,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:38,738 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] [2020-10-29 13:39:38,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:39:38,739 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1739392795, now seen corresponding path program 1 times [2020-10-29 13:39:38,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:38,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993508514] [2020-10-29 13:39:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:38,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:38,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:38,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:38,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:39,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:40,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:40,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:40,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:41,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:41,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:43,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:43,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 13:39:43,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:39:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:39:43,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:43,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:39:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:39:43,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:45,784 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:39:45,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:45,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:45,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:45,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:45,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:45,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 13:39:45,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:45,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:45,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:45,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:45,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:45,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:45,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993508514] [2020-10-29 13:39:45,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:45,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:39:45,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680271994] [2020-10-29 13:39:45,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:39:45,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:39:45,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:39:45,872 INFO L87 Difference]: Start difference. First operand 3573 states and 4862 transitions. Second operand 6 states. [2020-10-29 13:39:47,936 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:39:54,336 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 534 [2020-10-29 13:39:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:55,572 INFO L93 Difference]: Finished difference Result 7322 states and 10145 transitions. [2020-10-29 13:39:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:39:55,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-10-29 13:39:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:55,582 INFO L225 Difference]: With dead ends: 7322 [2020-10-29 13:39:55,583 INFO L226 Difference]: Without dead ends: 4418 [2020-10-29 13:39:55,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:39:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2020-10-29 13:39:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 4415. [2020-10-29 13:39:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4415 states. [2020-10-29 13:39:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 6084 transitions. [2020-10-29 13:39:56,005 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 6084 transitions. Word has length 62 [2020-10-29 13:39:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:56,005 INFO L481 AbstractCegarLoop]: Abstraction has 4415 states and 6084 transitions. [2020-10-29 13:39:56,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:39:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 6084 transitions. [2020-10-29 13:39:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 13:39:56,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:56,011 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] [2020-10-29 13:39:56,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:39:56,011 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:56,012 INFO L82 PathProgramCache]: Analyzing trace with hash -391520757, now seen corresponding path program 1 times [2020-10-29 13:39:56,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:56,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625684064] [2020-10-29 13:39:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:56,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:56,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:56,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:57,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:57,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:59,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:59,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 13:39:59,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:39:59,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3522 [2020-10-29 13:39:59,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:59,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:59,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:39:59,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:59,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:39:59,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:01,772 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:40:01,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:01,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:01,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:01,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:01,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:01,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:40:01,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:01,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:01,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:01,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625684064] [2020-10-29 13:40:01,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:01,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:40:01,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990306081] [2020-10-29 13:40:01,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:40:01,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:01,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:40:01,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:40:01,855 INFO L87 Difference]: Start difference. First operand 4415 states and 6084 transitions. Second operand 9 states. [2020-10-29 13:40:03,934 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 549