/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:32:50,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:32:50,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:32:50,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:32:50,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:32:50,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:32:50,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:32:50,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:32:50,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:32:50,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:32:50,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:32:50,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:32:50,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:32:50,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:32:50,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:32:50,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:32:50,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:32:50,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:32:50,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:32:50,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:32:50,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:32:50,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:32:50,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:32:50,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:32:50,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:32:50,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:32:50,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:32:50,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:32:50,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:32:50,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:32:50,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:32:50,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:32:50,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:32:50,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:32:50,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:32:50,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:32:50,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:32:50,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:32:50,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:32:50,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:32:50,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:32:50,459 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 [2020-10-28 18:32:50,516 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:32:50,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:32:50,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:32:50,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:32:50,521 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:32:50,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:32:50,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:32:50,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:32:50,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:32:50,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:32:50,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:32:50,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:32:50,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:32:50,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:32:50,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:32:50,525 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:32:50,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:32:50,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:32:50,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:32:50,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:32:50,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:32:50,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:32:50,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:32:50,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:32:50,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:32:50,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:32:50,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:32:50,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:32:50,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:32:50,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:32:50,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:32:50,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:32:50,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:32:50,989 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:32:50,990 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:32:50,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 18:32:51,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/037890980/b6c7e3b10c404cd3ac4dc20ef9870917/FLAG605cf2905 [2020-10-28 18:32:51,978 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:32:51,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 18:32:52,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/037890980/b6c7e3b10c404cd3ac4dc20ef9870917/FLAG605cf2905 [2020-10-28 18:32:52,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/037890980/b6c7e3b10c404cd3ac4dc20ef9870917 [2020-10-28 18:32:52,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:32:52,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:32:52,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:32:52,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:32:52,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:32:52,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:32:52" (1/1) ... [2020-10-28 18:32:52,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6282e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:52, skipping insertion in model container [2020-10-28 18:32:52,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:32:52" (1/1) ... [2020-10-28 18:32:52,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:32:52,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:32:52,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:32:52,969 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:32:53,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:32:53,288 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:32:53,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53 WrapperNode [2020-10-28 18:32:53,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:32:53,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:32:53,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:32:53,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:32:53,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53" (1/1) ... [2020-10-28 18:32:53,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53" (1/1) ... [2020-10-28 18:32:53,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53" (1/1) ... [2020-10-28 18:32:53,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53" (1/1) ... [2020-10-28 18:32:53,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53" (1/1) ... [2020-10-28 18:32:53,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53" (1/1) ... [2020-10-28 18:32:53,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53" (1/1) ... [2020-10-28 18:32:53,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:32:53,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:32:53,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:32:53,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:32:53,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53" (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 [2020-10-28 18:32:53,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:32:53,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:32:53,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:32:53,585 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:32:53,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:32:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:32:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:32:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:32:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:32:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:32:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:32:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:32:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:32:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:32:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:32:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:32:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:32:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:32:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:32:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:32:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:32:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:32:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:32:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:32:53,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:32:53,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:32:53,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:32:53,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:32:55,872 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:32:55,872 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:32:55,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:32:55 BoogieIcfgContainer [2020-10-28 18:32:55,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:32:55,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:32:55,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:32:55,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:32:55,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:32:52" (1/3) ... [2020-10-28 18:32:55,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb3239e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:32:55, skipping insertion in model container [2020-10-28 18:32:55,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:32:53" (2/3) ... [2020-10-28 18:32:55,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb3239e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:32:55, skipping insertion in model container [2020-10-28 18:32:55,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:32:55" (3/3) ... [2020-10-28 18:32:55,884 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 18:32:55,897 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:32:55,903 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:32:55,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:32:55,962 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:32:55,962 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:32:55,963 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:32:55,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:32:55,963 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:32:55,963 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:32:55,963 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:32:55,964 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:32:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states. [2020-10-28 18:32:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:32:56,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:56,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:32:56,016 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:56,023 INFO L82 PathProgramCache]: Analyzing trace with hash 445602210, now seen corresponding path program 1 times [2020-10-28 18:32:56,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:56,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857391368] [2020-10-28 18:32:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:56,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:56,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:57,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:57,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:58,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:59,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:00,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:00,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:00,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:00,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:01,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:01,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:33:01,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:33:01,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:33:01,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:01,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:01,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:33:01,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:33:01,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:33:01,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:33:01,850 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2020-10-28 18:33:02,689 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:33:02,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:02,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:02,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:02,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:02,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-28 18:33:02,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:02,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:02,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:33:02,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:33:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:33:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:02,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857391368] [2020-10-28 18:33:02,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:33:02,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:33:02,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305403142] [2020-10-28 18:33:02,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:33:02,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:33:02,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:33:02,877 INFO L87 Difference]: Start difference. First operand 579 states. Second operand 6 states. [2020-10-28 18:33:03,929 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:33:09,336 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:33:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:33:09,798 INFO L93 Difference]: Finished difference Result 900 states and 1527 transitions. [2020-10-28 18:33:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:33:09,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:33:09,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:33:09,836 INFO L225 Difference]: With dead ends: 900 [2020-10-28 18:33:09,836 INFO L226 Difference]: Without dead ends: 606 [2020-10-28 18:33:09,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:33:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-28 18:33:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 566. [2020-10-28 18:33:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-10-28 18:33:09,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 730 transitions. [2020-10-28 18:33:09,993 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 730 transitions. Word has length 65 [2020-10-28 18:33:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:33:09,994 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 730 transitions. [2020-10-28 18:33:09,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:33:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 730 transitions. [2020-10-28 18:33:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:33:09,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:33:09,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:33:09,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:33:09,999 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:33:10,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:33:10,000 INFO L82 PathProgramCache]: Analyzing trace with hash -965646780, now seen corresponding path program 1 times [2020-10-28 18:33:10,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:33:10,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001355628] [2020-10-28 18:33:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:33:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:10,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:10,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:10,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:10,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:13,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:14,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:14,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:15,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:15,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:33:15,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:33:15,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 18:33:15,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:15,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:15,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:33:15,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:15,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:33:15,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:33:16,144 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:33:16,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:16,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:16,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:16,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:16,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:16,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:33:16,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:16,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:16,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:33:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:33:16,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:33:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:16,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001355628] [2020-10-28 18:33:16,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:33:16,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:33:16,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700395575] [2020-10-28 18:33:16,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:33:16,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:16,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:33:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:33:16,225 INFO L87 Difference]: Start difference. First operand 566 states and 730 transitions. Second operand 8 states. [2020-10-28 18:33:17,247 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:33:20,846 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:33:22,074 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 18:33:22,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:33:22,985 INFO L93 Difference]: Finished difference Result 967 states and 1310 transitions. [2020-10-28 18:33:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:33:22,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 18:33:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:33:22,992 INFO L225 Difference]: With dead ends: 967 [2020-10-28 18:33:22,992 INFO L226 Difference]: Without dead ends: 837 [2020-10-28 18:33:22,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:33:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-10-28 18:33:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 564. [2020-10-28 18:33:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-10-28 18:33:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 727 transitions. [2020-10-28 18:33:23,051 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 727 transitions. Word has length 65 [2020-10-28 18:33:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:33:23,051 INFO L481 AbstractCegarLoop]: Abstraction has 564 states and 727 transitions. [2020-10-28 18:33:23,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:33:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 727 transitions. [2020-10-28 18:33:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:33:23,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:33:23,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:33:23,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:33:23,055 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:33:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:33:23,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2123568343, now seen corresponding path program 1 times [2020-10-28 18:33:23,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:33:23,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807747351] [2020-10-28 18:33:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:33:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:23,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:23,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:23,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:23,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:23,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:25,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:25,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:26,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:26,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:26,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:27,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:28,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:28,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:33:28,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:33:28,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:33:28,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:28,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:28,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:33:28,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:28,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:33:28,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:29,194 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:33:29,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:29,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:29,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:29,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:29,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 18:33:29,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:29,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:33:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:33:29,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:33:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807747351] [2020-10-28 18:33:29,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:33:29,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:33:29,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279818609] [2020-10-28 18:33:29,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:33:29,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:29,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:33:29,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:33:29,339 INFO L87 Difference]: Start difference. First operand 564 states and 727 transitions. Second operand 8 states. [2020-10-28 18:33:30,323 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:33:33,814 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:33:35,006 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:33:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:33:35,555 INFO L93 Difference]: Finished difference Result 839 states and 1116 transitions. [2020-10-28 18:33:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:33:35,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 18:33:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:33:35,571 INFO L225 Difference]: With dead ends: 839 [2020-10-28 18:33:35,571 INFO L226 Difference]: Without dead ends: 823 [2020-10-28 18:33:35,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:33:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2020-10-28 18:33:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 562. [2020-10-28 18:33:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-10-28 18:33:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 724 transitions. [2020-10-28 18:33:35,623 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 724 transitions. Word has length 65 [2020-10-28 18:33:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:33:35,623 INFO L481 AbstractCegarLoop]: Abstraction has 562 states and 724 transitions. [2020-10-28 18:33:35,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:33:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 724 transitions. [2020-10-28 18:33:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:33:35,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:33:35,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:33:35,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:33:35,626 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:33:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:33:35,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1721728547, now seen corresponding path program 1 times [2020-10-28 18:33:35,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:33:35,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016999048] [2020-10-28 18:33:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:33:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:35,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:35,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:35,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:36,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:36,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:36,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:37,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:37,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:38,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:40,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:40,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:33:40,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:33:40,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:33:40,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:40,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:33:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:33:40,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:41,612 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:33:41,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:41,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:41,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:41,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:41,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:41,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:33:41,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:41,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:41,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:33:41,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:41,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:33:41,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:41,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016999048] [2020-10-28 18:33:41,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:33:41,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:33:41,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576538043] [2020-10-28 18:33:41,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:33:41,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:41,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:33:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:33:41,694 INFO L87 Difference]: Start difference. First operand 562 states and 724 transitions. Second operand 8 states. [2020-10-28 18:33:42,707 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:33:46,184 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:33:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:33:47,266 INFO L93 Difference]: Finished difference Result 965 states and 1306 transitions. [2020-10-28 18:33:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:33:47,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 18:33:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:33:47,272 INFO L225 Difference]: With dead ends: 965 [2020-10-28 18:33:47,272 INFO L226 Difference]: Without dead ends: 838 [2020-10-28 18:33:47,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:33:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2020-10-28 18:33:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 560. [2020-10-28 18:33:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-10-28 18:33:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 721 transitions. [2020-10-28 18:33:47,317 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 721 transitions. Word has length 65 [2020-10-28 18:33:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:33:47,317 INFO L481 AbstractCegarLoop]: Abstraction has 560 states and 721 transitions. [2020-10-28 18:33:47,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:33:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 721 transitions. [2020-10-28 18:33:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:33:47,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:33:47,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:33:47,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:33:47,320 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:33:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:33:47,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1996866258, now seen corresponding path program 1 times [2020-10-28 18:33:47,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:33:47,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909317878] [2020-10-28 18:33:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:33:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:47,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:47,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:47,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:47,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:49,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:49,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:52,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:52,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:33:52,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:33:52,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 18:33:52,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:52,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:52,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:33:52,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:52,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:33:52,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:53,506 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:33:53,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:53,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:53,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:53,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:53,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:53,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:33:53,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:53,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:53,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:33:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:33:53,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:53,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909317878] [2020-10-28 18:33:53,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:33:53,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:33:53,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111295287] [2020-10-28 18:33:53,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:33:53,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:33:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:33:53,588 INFO L87 Difference]: Start difference. First operand 560 states and 721 transitions. Second operand 8 states. [2020-10-28 18:33:54,579 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 18:33:58,243 WARN L193 SmtUtils]: Spent 941.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-28 18:33:59,381 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:34:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:00,311 INFO L93 Difference]: Finished difference Result 848 states and 1123 transitions. [2020-10-28 18:34:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:34:00,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 18:34:00,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:00,317 INFO L225 Difference]: With dead ends: 848 [2020-10-28 18:34:00,318 INFO L226 Difference]: Without dead ends: 819 [2020-10-28 18:34:00,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:34:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-10-28 18:34:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 549. [2020-10-28 18:34:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-10-28 18:34:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 706 transitions. [2020-10-28 18:34:00,373 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 706 transitions. Word has length 65 [2020-10-28 18:34:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:00,374 INFO L481 AbstractCegarLoop]: Abstraction has 549 states and 706 transitions. [2020-10-28 18:34:00,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:34:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 706 transitions. [2020-10-28 18:34:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:34:00,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:00,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:34:00,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:34:00,376 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash 868169035, now seen corresponding path program 1 times [2020-10-28 18:34:00,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:00,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112703179] [2020-10-28 18:34:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:00,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:00,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:00,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:00,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:00,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:01,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:02,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:04,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:04,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:05,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:05,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:34:05,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:34:05,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:34:05,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:05,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:34:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:34:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:34:05,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:06,295 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:34:06,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:06,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:06,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:06,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:06,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:06,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:34:06,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:06,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:06,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:06,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:06,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:06,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112703179] [2020-10-28 18:34:06,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:06,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:34:06,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122697608] [2020-10-28 18:34:06,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:34:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:06,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:34:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:34:06,361 INFO L87 Difference]: Start difference. First operand 549 states and 706 transitions. Second operand 7 states. [2020-10-28 18:34:07,314 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:34:10,980 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:34:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:11,999 INFO L93 Difference]: Finished difference Result 956 states and 1291 transitions. [2020-10-28 18:34:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:34:11,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:34:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:12,005 INFO L225 Difference]: With dead ends: 956 [2020-10-28 18:34:12,005 INFO L226 Difference]: Without dead ends: 822 [2020-10-28 18:34:12,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:34:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2020-10-28 18:34:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 549. [2020-10-28 18:34:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-10-28 18:34:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 705 transitions. [2020-10-28 18:34:12,058 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 705 transitions. Word has length 67 [2020-10-28 18:34:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:12,059 INFO L481 AbstractCegarLoop]: Abstraction has 549 states and 705 transitions. [2020-10-28 18:34:12,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:34:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 705 transitions. [2020-10-28 18:34:12,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:34:12,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:12,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:34:12,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:34:12,061 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:12,062 INFO L82 PathProgramCache]: Analyzing trace with hash -426155862, now seen corresponding path program 1 times [2020-10-28 18:34:12,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:12,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063769056] [2020-10-28 18:34:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:12,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:12,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:12,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:12,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:12,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:12,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:13,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:16,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:16,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:16,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:16,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:17,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:17,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:34:17,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:34:17,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:34:17,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:17,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:34:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:34:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 18:34:17,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:18,119 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:34:18,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:18,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:18,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:18,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:18,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:18,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:34:18,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:18,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:18,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:18,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063769056] [2020-10-28 18:34:18,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:18,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:34:18,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302614846] [2020-10-28 18:34:18,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:34:18,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:18,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:34:18,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:34:18,179 INFO L87 Difference]: Start difference. First operand 549 states and 705 transitions. Second operand 8 states. [2020-10-28 18:34:19,232 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:34:23,050 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:34:23,967 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:34:25,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:25,402 INFO L93 Difference]: Finished difference Result 1226 states and 1682 transitions. [2020-10-28 18:34:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:34:25,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:34:25,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:25,410 INFO L225 Difference]: With dead ends: 1226 [2020-10-28 18:34:25,411 INFO L226 Difference]: Without dead ends: 1115 [2020-10-28 18:34:25,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:34:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-10-28 18:34:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 809. [2020-10-28 18:34:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-10-28 18:34:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1087 transitions. [2020-10-28 18:34:25,502 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1087 transitions. Word has length 67 [2020-10-28 18:34:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:25,503 INFO L481 AbstractCegarLoop]: Abstraction has 809 states and 1087 transitions. [2020-10-28 18:34:25,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:34:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1087 transitions. [2020-10-28 18:34:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:34:25,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:25,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:34:25,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:34:25,505 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:25,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1025904546, now seen corresponding path program 1 times [2020-10-28 18:34:25,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:25,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218176166] [2020-10-28 18:34:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:25,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:25,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:25,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:25,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:25,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:26,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:28,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:28,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:28,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:30,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:30,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:34:30,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:34:30,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:34:30,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:30,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:30,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:34:30,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:34:30,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:34:30,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:31,449 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:34:31,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:31,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:31,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:31,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:31,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:31,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:34:31,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:31,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:31,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:31,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:31,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:31,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:31,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218176166] [2020-10-28 18:34:31,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:31,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:34:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121295562] [2020-10-28 18:34:31,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:34:31,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:34:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:34:31,515 INFO L87 Difference]: Start difference. First operand 809 states and 1087 transitions. Second operand 8 states. [2020-10-28 18:34:32,526 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:34:36,770 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:34:37,659 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:34:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:39,223 INFO L93 Difference]: Finished difference Result 2480 states and 3543 transitions. [2020-10-28 18:34:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:34:39,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:34:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:39,235 INFO L225 Difference]: With dead ends: 2480 [2020-10-28 18:34:39,235 INFO L226 Difference]: Without dead ends: 2153 [2020-10-28 18:34:39,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:34:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2020-10-28 18:34:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1609. [2020-10-28 18:34:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-10-28 18:34:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2258 transitions. [2020-10-28 18:34:39,449 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2258 transitions. Word has length 67 [2020-10-28 18:34:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:39,449 INFO L481 AbstractCegarLoop]: Abstraction has 1609 states and 2258 transitions. [2020-10-28 18:34:39,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:34:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2258 transitions. [2020-10-28 18:34:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:34:39,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:39,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:34:39,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:34:39,452 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash -998339452, now seen corresponding path program 1 times [2020-10-28 18:34:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:39,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370821034] [2020-10-28 18:34:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:39,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:39,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:39,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:39,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:40,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:42,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:42,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:44,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:44,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:34:44,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:34:44,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:34:44,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:44,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:44,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:34:44,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:34:44,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:34:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:45,481 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:34:45,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:45,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:45,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:45,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:45,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:45,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:34:45,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:45,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:45,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:45,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370821034] [2020-10-28 18:34:45,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:45,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:34:45,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138975258] [2020-10-28 18:34:45,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:34:45,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:34:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:34:45,541 INFO L87 Difference]: Start difference. First operand 1609 states and 2258 transitions. Second operand 7 states. [2020-10-28 18:34:46,575 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:34:50,254 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:34:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:51,552 INFO L93 Difference]: Finished difference Result 3359 states and 4855 transitions. [2020-10-28 18:34:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:34:51,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:34:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:51,566 INFO L225 Difference]: With dead ends: 3359 [2020-10-28 18:34:51,566 INFO L226 Difference]: Without dead ends: 2869 [2020-10-28 18:34:51,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:34:51,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2869 states. [2020-10-28 18:34:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2869 to 1609. [2020-10-28 18:34:51,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-10-28 18:34:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2257 transitions. [2020-10-28 18:34:51,787 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2257 transitions. Word has length 67 [2020-10-28 18:34:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:51,787 INFO L481 AbstractCegarLoop]: Abstraction has 1609 states and 2257 transitions. [2020-10-28 18:34:51,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:34:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2257 transitions. [2020-10-28 18:34:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:34:51,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:51,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:34:51,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:34:51,790 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:51,791 INFO L82 PathProgramCache]: Analyzing trace with hash -437075604, now seen corresponding path program 1 times [2020-10-28 18:34:51,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:51,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333578694] [2020-10-28 18:34:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:51,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:51,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:51,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:52,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:52,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:53,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:55,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:55,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:55,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:55,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:56,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:56,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:56,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:34:56,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:34:56,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:34:56,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:56,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:34:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:34:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:34:56,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:57,737 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:34:57,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:57,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:57,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:57,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:57,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:57,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:34:57,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:57,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:57,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:57,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:57,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:57,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:57,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333578694] [2020-10-28 18:34:57,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:57,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:34:57,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069670076] [2020-10-28 18:34:57,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:34:57,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:34:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:34:57,793 INFO L87 Difference]: Start difference. First operand 1609 states and 2257 transitions. Second operand 7 states. [2020-10-28 18:34:58,782 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:35:02,475 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:35:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:03,675 INFO L93 Difference]: Finished difference Result 3716 states and 5452 transitions. [2020-10-28 18:35:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:35:03,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:35:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:03,687 INFO L225 Difference]: With dead ends: 3716 [2020-10-28 18:35:03,687 INFO L226 Difference]: Without dead ends: 3066 [2020-10-28 18:35:03,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:35:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2020-10-28 18:35:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 1609. [2020-10-28 18:35:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-10-28 18:35:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2256 transitions. [2020-10-28 18:35:03,869 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2256 transitions. Word has length 67 [2020-10-28 18:35:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:03,869 INFO L481 AbstractCegarLoop]: Abstraction has 1609 states and 2256 transitions. [2020-10-28 18:35:03,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:35:03,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2256 transitions. [2020-10-28 18:35:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:35:03,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:03,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:35:03,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:35:03,872 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:03,872 INFO L82 PathProgramCache]: Analyzing trace with hash -663008654, now seen corresponding path program 1 times [2020-10-28 18:35:03,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:03,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627171805] [2020-10-28 18:35:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:03,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:04,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:04,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:04,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:04,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:04,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:05,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:05,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:05,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:06,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:08,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:08,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:35:08,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:35:08,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:35:08,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:08,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:08,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:35:08,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:35:08,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:35:08,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:09,834 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:35:09,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:09,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:09,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:09,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:09,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:09,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:35:09,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:09,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:09,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627171805] [2020-10-28 18:35:09,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:35:09,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:35:09,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447978752] [2020-10-28 18:35:09,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:35:09,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:09,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:35:09,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:35:09,881 INFO L87 Difference]: Start difference. First operand 1609 states and 2256 transitions. Second operand 7 states. [2020-10-28 18:35:10,856 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:35:14,513 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:35:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:15,763 INFO L93 Difference]: Finished difference Result 3845 states and 5599 transitions. [2020-10-28 18:35:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:35:15,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:35:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:15,774 INFO L225 Difference]: With dead ends: 3845 [2020-10-28 18:35:15,774 INFO L226 Difference]: Without dead ends: 3147 [2020-10-28 18:35:15,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:35:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2020-10-28 18:35:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 1609. [2020-10-28 18:35:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-10-28 18:35:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2255 transitions. [2020-10-28 18:35:16,001 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2255 transitions. Word has length 67 [2020-10-28 18:35:16,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:16,001 INFO L481 AbstractCegarLoop]: Abstraction has 1609 states and 2255 transitions. [2020-10-28 18:35:16,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:35:16,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2255 transitions. [2020-10-28 18:35:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:35:16,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:16,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:35:16,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:35:16,004 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash -319914876, now seen corresponding path program 1 times [2020-10-28 18:35:16,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:16,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463934711] [2020-10-28 18:35:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:16,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:16,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:16,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:16,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:16,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:16,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:16,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:18,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:18,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:18,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:18,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:19,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:19,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:19,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:20,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:21,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:21,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:35:21,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:35:21,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:35:21,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:21,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:35:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:35:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:35:21,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:22,015 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:35:22,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:22,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:22,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:22,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:22,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:22,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:35:22,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:22,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:22,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:22,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463934711] [2020-10-28 18:35:22,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:35:22,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:35:22,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571570663] [2020-10-28 18:35:22,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:35:22,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:22,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:35:22,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:35:22,059 INFO L87 Difference]: Start difference. First operand 1609 states and 2255 transitions. Second operand 8 states. [2020-10-28 18:35:23,117 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:35:27,831 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:35:28,893 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:35:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:30,893 INFO L93 Difference]: Finished difference Result 6211 states and 9098 transitions. [2020-10-28 18:35:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:35:30,894 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:35:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:30,912 INFO L225 Difference]: With dead ends: 6211 [2020-10-28 18:35:30,912 INFO L226 Difference]: Without dead ends: 5273 [2020-10-28 18:35:30,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:35:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2020-10-28 18:35:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 3844. [2020-10-28 18:35:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3844 states. [2020-10-28 18:35:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5535 transitions. [2020-10-28 18:35:31,537 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5535 transitions. Word has length 67 [2020-10-28 18:35:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:31,537 INFO L481 AbstractCegarLoop]: Abstraction has 3844 states and 5535 transitions. [2020-10-28 18:35:31,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:35:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5535 transitions. [2020-10-28 18:35:31,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:35:31,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:31,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:35:31,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:35:31,541 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:31,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1795259119, now seen corresponding path program 1 times [2020-10-28 18:35:31,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:31,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575638266] [2020-10-28 18:35:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:31,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:31,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:31,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:31,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:32,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:32,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:32,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:32,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:33,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:33,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:34,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:34,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:35,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:36,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:36,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:36,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:35:36,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:35:36,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:35:36,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:36,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:35:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:35:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 18:35:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:37,585 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:35:37,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:37,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:37,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:37,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:37,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:37,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:35:37,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:37,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:37,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:37,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:37,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:37,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:37,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575638266] [2020-10-28 18:35:37,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:35:37,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:35:37,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824766773] [2020-10-28 18:35:37,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:35:37,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:37,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:35:37,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:35:37,636 INFO L87 Difference]: Start difference. First operand 3844 states and 5535 transitions. Second operand 8 states. [2020-10-28 18:35:38,700 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:35:42,769 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:35:43,835 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:35:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:45,872 INFO L93 Difference]: Finished difference Result 5261 states and 7608 transitions. [2020-10-28 18:35:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:35:45,872 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:35:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:45,903 INFO L225 Difference]: With dead ends: 5261 [2020-10-28 18:35:45,903 INFO L226 Difference]: Without dead ends: 5254 [2020-10-28 18:35:45,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:35:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5254 states. [2020-10-28 18:35:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5254 to 3844. [2020-10-28 18:35:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3844 states. [2020-10-28 18:35:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5532 transitions. [2020-10-28 18:35:46,492 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5532 transitions. Word has length 67 [2020-10-28 18:35:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:46,492 INFO L481 AbstractCegarLoop]: Abstraction has 3844 states and 5532 transitions. [2020-10-28 18:35:46,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:35:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5532 transitions. [2020-10-28 18:35:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:35:46,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:46,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:35:46,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:35:46,496 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1003061388, now seen corresponding path program 1 times [2020-10-28 18:35:46,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:46,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449063127] [2020-10-28 18:35:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:46,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:46,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:46,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:46,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:47,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:50,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:50,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:51,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:51,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:51,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:35:51,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:35:51,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:35:51,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:51,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:35:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:35:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:35:51,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:52,525 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:35:52,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:52,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:52,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:52,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:52,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:52,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:35:52,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:52,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:52,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:52,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:52,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:52,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:52,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449063127] [2020-10-28 18:35:52,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:35:52,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:35:52,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909284580] [2020-10-28 18:35:52,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:35:52,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:35:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:35:52,571 INFO L87 Difference]: Start difference. First operand 3844 states and 5532 transitions. Second operand 7 states. [2020-10-28 18:35:53,618 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:35:57,404 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:35:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:59,347 INFO L93 Difference]: Finished difference Result 9934 states and 14797 transitions. [2020-10-28 18:35:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:35:59,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:35:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:59,376 INFO L225 Difference]: With dead ends: 9934 [2020-10-28 18:35:59,376 INFO L226 Difference]: Without dead ends: 8056 [2020-10-28 18:35:59,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:35:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8056 states. [2020-10-28 18:35:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8056 to 3844. [2020-10-28 18:35:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3844 states. [2020-10-28 18:35:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5531 transitions. [2020-10-28 18:35:59,867 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5531 transitions. Word has length 67 [2020-10-28 18:35:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:59,867 INFO L481 AbstractCegarLoop]: Abstraction has 3844 states and 5531 transitions. [2020-10-28 18:35:59,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:35:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5531 transitions. [2020-10-28 18:35:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:35:59,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:59,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:35:59,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:35:59,870 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1149271481, now seen corresponding path program 1 times [2020-10-28 18:35:59,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:59,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426756593] [2020-10-28 18:35:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:59,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:59,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:00,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:00,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:00,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:01,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:01,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:01,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:02,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:03,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:03,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:04,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:04,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:36:04,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:36:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:36:04,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:04,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:36:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:36:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:36:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:36:05,900 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:36:05,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:36:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:05,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:05,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:05,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:36:05,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:36:05,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:36:05,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:05,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:05,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:36:05,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:36:05,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:36:05,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:36:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:36:05,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426756593] [2020-10-28 18:36:05,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:36:05,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:36:05,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602826465] [2020-10-28 18:36:05,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:36:05,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:36:05,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:36:05,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:36:05,947 INFO L87 Difference]: Start difference. First operand 3844 states and 5531 transitions. Second operand 7 states. [2020-10-28 18:36:06,969 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:36:10,856 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:36:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:36:12,723 INFO L93 Difference]: Finished difference Result 8530 states and 12599 transitions. [2020-10-28 18:36:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:36:12,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:36:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:36:12,743 INFO L225 Difference]: With dead ends: 8530 [2020-10-28 18:36:12,743 INFO L226 Difference]: Without dead ends: 7206 [2020-10-28 18:36:12,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:36:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7206 states. [2020-10-28 18:36:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7206 to 3844. [2020-10-28 18:36:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3844 states. [2020-10-28 18:36:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5530 transitions. [2020-10-28 18:36:13,250 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5530 transitions. Word has length 67 [2020-10-28 18:36:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:36:13,250 INFO L481 AbstractCegarLoop]: Abstraction has 3844 states and 5530 transitions. [2020-10-28 18:36:13,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:36:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5530 transitions. [2020-10-28 18:36:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:36:13,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:36:13,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:36:13,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:36:13,253 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:36:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:36:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1273772413, now seen corresponding path program 1 times [2020-10-28 18:36:13,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:36:13,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207013200] [2020-10-28 18:36:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:36:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:13,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:13,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:13,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:13,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:13,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:14,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:15,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:15,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:15,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:15,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:16,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:16,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:16,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:17,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:18,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:18,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:18,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:36:18,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:36:18,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:36:18,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:18,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:18,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:36:18,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:36:18,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:36:18,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:36:19,303 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:36:19,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:36:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:19,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:19,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:19,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:36:19,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:36:19,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:36:19,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:19,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:19,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:36:19,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:36:19,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:36:19,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:36:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:36:19,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207013200] [2020-10-28 18:36:19,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:36:19,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:36:19,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621580574] [2020-10-28 18:36:19,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:36:19,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:36:19,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:36:19,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:36:19,368 INFO L87 Difference]: Start difference. First operand 3844 states and 5530 transitions. Second operand 8 states. [2020-10-28 18:36:20,399 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:36:24,465 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:36:25,491 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:36:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:36:27,512 INFO L93 Difference]: Finished difference Result 5254 states and 7596 transitions. [2020-10-28 18:36:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:36:27,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:36:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:36:27,524 INFO L225 Difference]: With dead ends: 5254 [2020-10-28 18:36:27,524 INFO L226 Difference]: Without dead ends: 5244 [2020-10-28 18:36:27,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:36:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2020-10-28 18:36:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 3844. [2020-10-28 18:36:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3844 states. [2020-10-28 18:36:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5529 transitions. [2020-10-28 18:36:28,141 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5529 transitions. Word has length 67 [2020-10-28 18:36:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:36:28,141 INFO L481 AbstractCegarLoop]: Abstraction has 3844 states and 5529 transitions. [2020-10-28 18:36:28,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:36:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5529 transitions. [2020-10-28 18:36:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:36:28,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:36:28,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:36:28,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:36:28,144 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:36:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:36:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash -64545893, now seen corresponding path program 1 times [2020-10-28 18:36:28,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:36:28,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271078232] [2020-10-28 18:36:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:36:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:28,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:28,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:29,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:29,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:29,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:29,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:29,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:30,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:31,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:31,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking...