/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-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:54:48,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:54:48,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:54:48,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:54:48,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:54:48,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:54:48,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:54:48,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:54:48,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:54:48,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:54:48,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:54:48,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:54:48,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:54:48,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:54:48,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:54:48,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:54:48,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:54:48,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:54:48,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:54:48,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:54:48,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:54:48,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:54:48,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:54:48,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:54:48,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:54:48,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:54:48,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:54:48,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:54:48,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:54:48,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:54:48,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:54:48,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:54:48,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:54:48,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:54:48,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:54:48,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:54:48,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:54:48,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:54:48,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:54:48,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:54:48,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:54:48,466 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 18:54:48,516 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:54:48,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:54:48,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:54:48,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:54:48,522 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:54:48,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:54:48,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:54:48,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:54:48,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:54:48,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:54:48,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:54:48,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:54:48,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:54:48,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:54:48,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:54:48,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:54:48,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:54:48,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:54:48,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:54:48,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:54:48,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:54:48,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:54:48,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:54:48,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:54:48,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:54:48,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:54:48,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:54:48,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:54:48,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:54:48,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:54:48,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:54:49,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:54:49,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:54:49,040 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:54:49,040 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:54:49,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:54:49,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e78c3a88d/24c4f13ca6934e25962ff7f3decde16d/FLAG93828f67e [2020-10-28 18:54:50,018 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:54:50,019 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:54:50,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e78c3a88d/24c4f13ca6934e25962ff7f3decde16d/FLAG93828f67e [2020-10-28 18:54:50,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e78c3a88d/24c4f13ca6934e25962ff7f3decde16d [2020-10-28 18:54:50,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:54:50,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:54:50,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:50,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:54:50,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:54:50,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:50" (1/1) ... [2020-10-28 18:54:50,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6871c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:50, skipping insertion in model container [2020-10-28 18:54:50,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:50" (1/1) ... [2020-10-28 18:54:50,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:54:50,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:54:50,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:50,903 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:54:51,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:51,112 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:54:51,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51 WrapperNode [2020-10-28 18:54:51,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:51,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:54:51,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:54:51,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:54:51,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51" (1/1) ... [2020-10-28 18:54:51,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51" (1/1) ... [2020-10-28 18:54:51,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51" (1/1) ... [2020-10-28 18:54:51,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51" (1/1) ... [2020-10-28 18:54:51,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51" (1/1) ... [2020-10-28 18:54:51,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51" (1/1) ... [2020-10-28 18:54:51,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51" (1/1) ... [2020-10-28 18:54:51,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:54:51,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:54:51,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:54:51,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:54:51,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51" (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 18:54:51,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:54:51,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:54:51,355 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:54:51,355 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:54:51,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:54:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:54:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:54:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:54:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:54:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:54:51,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:54:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:54:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:54:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:54:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:54:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:54:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:54:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:54:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:54:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:54:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:54:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:54:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:54:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:54:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:54:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:54:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:54:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:54:53,711 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:54:53,712 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:54:53,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:53 BoogieIcfgContainer [2020-10-28 18:54:53,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:54:53,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:54:53,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:54:53,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:54:53,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:54:50" (1/3) ... [2020-10-28 18:54:53,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7316ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:53, skipping insertion in model container [2020-10-28 18:54:53,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:51" (2/3) ... [2020-10-28 18:54:53,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7316ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:53, skipping insertion in model container [2020-10-28 18:54:53,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:53" (3/3) ... [2020-10-28 18:54:53,723 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:54:53,735 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:54:53,740 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:54:53,754 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:54:53,785 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:54:53,785 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:54:53,785 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:54:53,785 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:54:53,785 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:54:53,785 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:54:53,786 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:54:53,786 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:54:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states. [2020-10-28 18:54:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:54:53,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:53,832 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] [2020-10-28 18:54:53,832 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:53,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1101731786, now seen corresponding path program 1 times [2020-10-28 18:54:53,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:53,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651852632] [2020-10-28 18:54:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:54,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:54,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:54,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:54,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:56,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:56,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:58,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:58,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:58,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:59,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:59,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:54:59,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:54:59,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:54:59,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:59,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:59,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:54:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:54:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:54:59,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:55:00,224 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:55:00,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:00,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:00,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:00,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:00,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 18:55:00,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:00,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:00,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:00,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:00,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:00,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:00,345 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 18:55:00,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651852632] [2020-10-28 18:55:00,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:00,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:55:00,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562345659] [2020-10-28 18:55:00,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:00,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:00,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:00,372 INFO L87 Difference]: Start difference. First operand 465 states. Second operand 8 states. [2020-10-28 18:55:01,110 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 18:55:05,334 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:55:06,721 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:55:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:06,929 INFO L93 Difference]: Finished difference Result 851 states and 1458 transitions. [2020-10-28 18:55:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:55:06,934 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-28 18:55:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:06,972 INFO L225 Difference]: With dead ends: 851 [2020-10-28 18:55:06,972 INFO L226 Difference]: Without dead ends: 705 [2020-10-28 18:55:06,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:55:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-10-28 18:55:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 462. [2020-10-28 18:55:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-28 18:55:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 604 transitions. [2020-10-28 18:55:07,071 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 604 transitions. Word has length 55 [2020-10-28 18:55:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:07,072 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 604 transitions. [2020-10-28 18:55:07,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 604 transitions. [2020-10-28 18:55:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:55:07,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:07,078 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] [2020-10-28 18:55:07,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:55:07,079 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:07,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2092309806, now seen corresponding path program 1 times [2020-10-28 18:55:07,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:07,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500635622] [2020-10-28 18:55:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:07,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:08,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:08,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:09,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:11,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:11,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:12,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:12,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:55:12,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:55:12,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 18:55:12,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:12,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 18:55:12,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:55:12,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:12,871 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:55:12,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:12,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:12,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:12,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:12,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:12,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:55:12,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:12,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:12,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:12,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:12,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:12,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:12,933 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 18:55:12,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500635622] [2020-10-28 18:55:12,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:12,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:55:12,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189172320] [2020-10-28 18:55:12,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:55:12,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:12,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:55:12,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:55:12,938 INFO L87 Difference]: Start difference. First operand 462 states and 604 transitions. Second operand 4 states. [2020-10-28 18:55:13,625 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:55:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:16,059 INFO L93 Difference]: Finished difference Result 729 states and 997 transitions. [2020-10-28 18:55:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:55:16,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 18:55:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:16,067 INFO L225 Difference]: With dead ends: 729 [2020-10-28 18:55:16,067 INFO L226 Difference]: Without dead ends: 586 [2020-10-28 18:55:16,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:55:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-10-28 18:55:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 580. [2020-10-28 18:55:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-10-28 18:55:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 778 transitions. [2020-10-28 18:55:16,112 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 778 transitions. Word has length 55 [2020-10-28 18:55:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:16,112 INFO L481 AbstractCegarLoop]: Abstraction has 580 states and 778 transitions. [2020-10-28 18:55:16,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:55:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 778 transitions. [2020-10-28 18:55:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:55:16,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:16,115 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] [2020-10-28 18:55:16,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:55:16,116 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:16,116 INFO L82 PathProgramCache]: Analyzing trace with hash -590777575, now seen corresponding path program 1 times [2020-10-28 18:55:16,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:16,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730951009] [2020-10-28 18:55:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:16,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:17,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:17,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:17,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:17,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:21,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:21,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:55:21,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:55:21,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 18:55:21,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:21,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:21,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:21,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:21,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:55:21,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:21,978 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:55:21,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:22,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:22,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:22,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:22,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:22,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 18:55:22,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:22,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:22,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:22,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:22,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:22,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:22,122 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 18:55:22,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730951009] [2020-10-28 18:55:22,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:22,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:55:22,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206389273] [2020-10-28 18:55:22,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:22,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:22,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:22,129 INFO L87 Difference]: Start difference. First operand 580 states and 778 transitions. Second operand 8 states. [2020-10-28 18:55:22,833 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 18:55:25,918 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:55:27,369 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:55:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:27,625 INFO L93 Difference]: Finished difference Result 1464 states and 2103 transitions. [2020-10-28 18:55:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:55:27,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-28 18:55:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:27,633 INFO L225 Difference]: With dead ends: 1464 [2020-10-28 18:55:27,634 INFO L226 Difference]: Without dead ends: 1262 [2020-10-28 18:55:27,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:55:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2020-10-28 18:55:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 616. [2020-10-28 18:55:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-10-28 18:55:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 820 transitions. [2020-10-28 18:55:27,684 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 820 transitions. Word has length 55 [2020-10-28 18:55:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:27,685 INFO L481 AbstractCegarLoop]: Abstraction has 616 states and 820 transitions. [2020-10-28 18:55:27,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 820 transitions. [2020-10-28 18:55:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:55:27,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:27,688 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] [2020-10-28 18:55:27,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:55:27,688 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash 425180388, now seen corresponding path program 1 times [2020-10-28 18:55:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:27,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605136692] [2020-10-28 18:55:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:27,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:27,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:27,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:27,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:28,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:28,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:29,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:31,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:31,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:31,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:31,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:32,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:32,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:32,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:32,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:55:32,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:55:32,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:55:32,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:32,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:32,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:32,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:32,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:55:32,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:33,546 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:55:33,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:33,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:33,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:33,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:33,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:55:33,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:33,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:33,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:33,627 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 18:55:33,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605136692] [2020-10-28 18:55:33,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:33,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:55:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073853070] [2020-10-28 18:55:33,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:33,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:33,630 INFO L87 Difference]: Start difference. First operand 616 states and 820 transitions. Second operand 8 states. [2020-10-28 18:55:34,310 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:55:37,389 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-28 18:55:39,124 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:55:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:39,428 INFO L93 Difference]: Finished difference Result 1397 states and 1961 transitions. [2020-10-28 18:55:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:55:39,428 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:55:39,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:39,438 INFO L225 Difference]: With dead ends: 1397 [2020-10-28 18:55:39,439 INFO L226 Difference]: Without dead ends: 1222 [2020-10-28 18:55:39,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:55:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2020-10-28 18:55:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 659. [2020-10-28 18:55:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2020-10-28 18:55:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 882 transitions. [2020-10-28 18:55:39,499 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 882 transitions. Word has length 56 [2020-10-28 18:55:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:39,499 INFO L481 AbstractCegarLoop]: Abstraction has 659 states and 882 transitions. [2020-10-28 18:55:39,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 882 transitions. [2020-10-28 18:55:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:55:39,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:39,503 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] [2020-10-28 18:55:39,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:55:39,503 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:39,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1491503906, now seen corresponding path program 1 times [2020-10-28 18:55:39,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:39,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368251097] [2020-10-28 18:55:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:39,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:40,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:41,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:41,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:43,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:43,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:44,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:44,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:55:44,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:55:44,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:55:44,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:44,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:44,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:44,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:44,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:55:44,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:45,320 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:55:45,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:45,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:45,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:45,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:45,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:45,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 18:55:45,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:45,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:45,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:45,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:45,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:45,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:45,395 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 18:55:45,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368251097] [2020-10-28 18:55:45,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:45,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:55:45,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024782954] [2020-10-28 18:55:45,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:45,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:45,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:45,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:45,398 INFO L87 Difference]: Start difference. First operand 659 states and 882 transitions. Second operand 8 states. [2020-10-28 18:55:46,089 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:55:48,977 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:55:50,605 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:55:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:50,915 INFO L93 Difference]: Finished difference Result 1522 states and 2137 transitions. [2020-10-28 18:55:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:55:50,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:55:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:50,922 INFO L225 Difference]: With dead ends: 1522 [2020-10-28 18:55:50,922 INFO L226 Difference]: Without dead ends: 1314 [2020-10-28 18:55:50,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:55:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2020-10-28 18:55:50,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 667. [2020-10-28 18:55:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-10-28 18:55:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 890 transitions. [2020-10-28 18:55:50,977 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 890 transitions. Word has length 56 [2020-10-28 18:55:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:50,978 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 890 transitions. [2020-10-28 18:55:50,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 890 transitions. [2020-10-28 18:55:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:50,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:50,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:50,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:55:50,980 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:50,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:50,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1876536965, now seen corresponding path program 1 times [2020-10-28 18:55:50,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:50,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597625249] [2020-10-28 18:55:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:51,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:53,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:53,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:54,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:54,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:55,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:55,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:55,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:55,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:56,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:56,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:56,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:55:56,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:55:56,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:56,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:55:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:55:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:56,876 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:55:56,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:56,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:56,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:56,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:56,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:56,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:55:56,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:56,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:56,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:56,928 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 18:55:56,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597625249] [2020-10-28 18:55:56,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:56,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:55:56,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314181063] [2020-10-28 18:55:56,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:56,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:56,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:56,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:56,931 INFO L87 Difference]: Start difference. First operand 667 states and 890 transitions. Second operand 8 states. [2020-10-28 18:55:57,687 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-28 18:56:00,885 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2020-10-28 18:56:01,950 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:56:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:02,843 INFO L93 Difference]: Finished difference Result 2074 states and 2936 transitions. [2020-10-28 18:56:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:56:02,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-28 18:56:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:02,854 INFO L225 Difference]: With dead ends: 2074 [2020-10-28 18:56:02,855 INFO L226 Difference]: Without dead ends: 1850 [2020-10-28 18:56:02,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:56:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2020-10-28 18:56:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 667. [2020-10-28 18:56:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-10-28 18:56:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 890 transitions. [2020-10-28 18:56:02,925 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 890 transitions. Word has length 57 [2020-10-28 18:56:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:02,925 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 890 transitions. [2020-10-28 18:56:02,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:56:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 890 transitions. [2020-10-28 18:56:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:56:02,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:02,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:02,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:56:02,927 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:02,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1710846274, now seen corresponding path program 1 times [2020-10-28 18:56:02,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:02,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357394268] [2020-10-28 18:56:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:02,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:06,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:07,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:07,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:07,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:56:07,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:56:07,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:56:07,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:07,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:07,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:07,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:56:07,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:56:07,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:08,583 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:56:08,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:08,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:08,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:08,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:08,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:56:08,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:08,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:08,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:08,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:08,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:08,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:56:08,630 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 18:56:08,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357394268] [2020-10-28 18:56:08,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:08,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:56:08,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614231898] [2020-10-28 18:56:08,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:56:08,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:56:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:56:08,632 INFO L87 Difference]: Start difference. First operand 667 states and 890 transitions. Second operand 4 states. [2020-10-28 18:56:09,300 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:56:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:11,859 INFO L93 Difference]: Finished difference Result 1071 states and 1465 transitions. [2020-10-28 18:56:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:56:11,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:56:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:11,864 INFO L225 Difference]: With dead ends: 1071 [2020-10-28 18:56:11,864 INFO L226 Difference]: Without dead ends: 860 [2020-10-28 18:56:11,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:56:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-10-28 18:56:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 857. [2020-10-28 18:56:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-10-28 18:56:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1154 transitions. [2020-10-28 18:56:11,959 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1154 transitions. Word has length 57 [2020-10-28 18:56:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:11,960 INFO L481 AbstractCegarLoop]: Abstraction has 857 states and 1154 transitions. [2020-10-28 18:56:11,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:56:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1154 transitions. [2020-10-28 18:56:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:56:11,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:11,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:11,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:56:11,962 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash -703147839, now seen corresponding path program 1 times [2020-10-28 18:56:11,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:11,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311794196] [2020-10-28 18:56:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:12,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:12,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:12,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:12,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:12,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:13,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:13,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:13,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:13,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:14,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:14,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:15,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:15,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:15,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:15,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:15,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:16,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:17,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:17,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:56:17,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:56:17,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:56:17,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:17,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:17,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:56:17,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:56:17,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:56:17,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:17,719 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:56:17,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:17,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:17,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:17,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:17,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:17,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:56:17,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:17,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:17,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:17,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:17,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:56:17,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:17,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311794196] [2020-10-28 18:56:17,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:17,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:56:17,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731897305] [2020-10-28 18:56:17,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:56:17,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:56:17,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:56:17,777 INFO L87 Difference]: Start difference. First operand 857 states and 1154 transitions. Second operand 7 states. [2020-10-28 18:56:18,448 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:56:21,320 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:56:22,804 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:56:23,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:23,215 INFO L93 Difference]: Finished difference Result 2044 states and 2866 transitions. [2020-10-28 18:56:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:56:23,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-28 18:56:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:23,224 INFO L225 Difference]: With dead ends: 2044 [2020-10-28 18:56:23,224 INFO L226 Difference]: Without dead ends: 1781 [2020-10-28 18:56:23,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:56:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2020-10-28 18:56:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 889. [2020-10-28 18:56:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2020-10-28 18:56:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1200 transitions. [2020-10-28 18:56:23,333 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1200 transitions. Word has length 57 [2020-10-28 18:56:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:23,333 INFO L481 AbstractCegarLoop]: Abstraction has 889 states and 1200 transitions. [2020-10-28 18:56:23,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:56:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1200 transitions. [2020-10-28 18:56:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:56:23,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:23,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:23,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:56:23,336 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1091941505, now seen corresponding path program 1 times [2020-10-28 18:56:23,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:23,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859341837] [2020-10-28 18:56:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:23,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:23,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:23,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:23,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:23,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:23,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:24,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:24,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:24,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:24,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:25,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:25,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:27,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:27,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:28,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:28,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:56:28,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:56:28,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:56:28,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:28,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:28,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:56:28,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:56:28,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:56:28,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:29,057 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:56:29,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:29,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:29,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:29,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:29,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:29,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:56:29,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:29,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:29,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:29,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:29,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:56:29,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:29,109 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 18:56:29,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859341837] [2020-10-28 18:56:29,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:29,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:56:29,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351920921] [2020-10-28 18:56:29,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:56:29,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:29,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:56:29,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:56:29,111 INFO L87 Difference]: Start difference. First operand 889 states and 1200 transitions. Second operand 6 states. [2020-10-28 18:56:29,805 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:56:32,303 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:56:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:32,687 INFO L93 Difference]: Finished difference Result 1812 states and 2494 transitions. [2020-10-28 18:56:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:56:32,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 18:56:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:32,693 INFO L225 Difference]: With dead ends: 1812 [2020-10-28 18:56:32,693 INFO L226 Difference]: Without dead ends: 1171 [2020-10-28 18:56:32,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:56:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2020-10-28 18:56:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1162. [2020-10-28 18:56:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-28 18:56:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1585 transitions. [2020-10-28 18:56:32,842 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1585 transitions. Word has length 58 [2020-10-28 18:56:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:32,843 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1585 transitions. [2020-10-28 18:56:32,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:56:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1585 transitions. [2020-10-28 18:56:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:56:32,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:32,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:32,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:56:32,846 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:32,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:32,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2032830262, now seen corresponding path program 1 times [2020-10-28 18:56:32,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:32,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643470576] [2020-10-28 18:56:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:32,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:32,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:32,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:33,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:33,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:33,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:34,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:34,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:34,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:35,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:35,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:36,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:36,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:36,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:36,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:37,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:37,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:37,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:56:37,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:56:37,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:56:37,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:37,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:56:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:56:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:56:37,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:38,746 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:56:38,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:38,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:38,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:38,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:38,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:56:38,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:38,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:38,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:38,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:38,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:38,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:38,788 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 18:56:38,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643470576] [2020-10-28 18:56:38,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:38,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:56:38,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879286509] [2020-10-28 18:56:38,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:56:38,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:38,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:56:38,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:56:38,790 INFO L87 Difference]: Start difference. First operand 1162 states and 1585 transitions. Second operand 9 states. [2020-10-28 18:56:39,533 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 18:56:42,583 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2020-10-28 18:56:44,141 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2020-10-28 18:56:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:44,789 INFO L93 Difference]: Finished difference Result 3512 states and 5017 transitions. [2020-10-28 18:56:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:56:44,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-28 18:56:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:44,802 INFO L225 Difference]: With dead ends: 3512 [2020-10-28 18:56:44,802 INFO L226 Difference]: Without dead ends: 3507 [2020-10-28 18:56:44,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:56:44,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2020-10-28 18:56:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 1159. [2020-10-28 18:56:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2020-10-28 18:56:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1581 transitions. [2020-10-28 18:56:45,005 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1581 transitions. Word has length 59 [2020-10-28 18:56:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:45,005 INFO L481 AbstractCegarLoop]: Abstraction has 1159 states and 1581 transitions. [2020-10-28 18:56:45,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:56:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1581 transitions. [2020-10-28 18:56:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:56:45,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:45,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:45,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:56:45,009 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -659307424, now seen corresponding path program 1 times [2020-10-28 18:56:45,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:45,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971511297] [2020-10-28 18:56:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:45,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:45,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:45,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:45,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:45,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:45,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:45,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:46,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:46,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:46,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:46,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:48,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:48,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:49,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:49,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:49,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:50,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:50,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:56:50,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:56:50,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:56:50,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:50,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:50,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:50,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:56:50,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:56:50,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:50,699 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:56:50,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:50,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:50,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:50,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:50,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:50,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:56:50,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:50,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:50,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:50,737 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 18:56:50,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971511297] [2020-10-28 18:56:50,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:50,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:56:50,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484360816] [2020-10-28 18:56:50,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:56:50,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:50,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:56:50,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:56:50,740 INFO L87 Difference]: Start difference. First operand 1159 states and 1581 transitions. Second operand 4 states. [2020-10-28 18:56:51,402 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 18:56:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:53,006 INFO L93 Difference]: Finished difference Result 1700 states and 2360 transitions. [2020-10-28 18:56:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:56:53,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-28 18:56:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:53,011 INFO L225 Difference]: With dead ends: 1700 [2020-10-28 18:56:53,011 INFO L226 Difference]: Without dead ends: 1165 [2020-10-28 18:56:53,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:56:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-10-28 18:56:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1160. [2020-10-28 18:56:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-10-28 18:56:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1619 transitions. [2020-10-28 18:56:53,252 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1619 transitions. Word has length 60 [2020-10-28 18:56:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:53,252 INFO L481 AbstractCegarLoop]: Abstraction has 1160 states and 1619 transitions. [2020-10-28 18:56:53,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:56:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1619 transitions. [2020-10-28 18:56:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:56:53,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:53,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:53,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:56:53,256 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash 770321802, now seen corresponding path program 1 times [2020-10-28 18:56:53,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:53,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74465005] [2020-10-28 18:56:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:53,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:53,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:53,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:53,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:53,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:53,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:54,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:54,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:58,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:58,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:56:58,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:56:58,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:56:58,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:58,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:56:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:56:58,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:58,926 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:56:58,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:58,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:58,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:58,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:58,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:58,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:56:58,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:58,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:58,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:58,963 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 18:56:58,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74465005] [2020-10-28 18:56:58,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:58,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:56:58,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250084360] [2020-10-28 18:56:58,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:56:58,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:58,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:56:58,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:56:58,965 INFO L87 Difference]: Start difference. First operand 1160 states and 1619 transitions. Second operand 4 states. [2020-10-28 18:56:59,640 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:57:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:01,273 INFO L93 Difference]: Finished difference Result 2330 states and 3343 transitions. [2020-10-28 18:57:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:01,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-28 18:57:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:01,280 INFO L225 Difference]: With dead ends: 2330 [2020-10-28 18:57:01,280 INFO L226 Difference]: Without dead ends: 1737 [2020-10-28 18:57:01,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2020-10-28 18:57:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1734. [2020-10-28 18:57:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1734 states. [2020-10-28 18:57:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2447 transitions. [2020-10-28 18:57:01,639 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2447 transitions. Word has length 70 [2020-10-28 18:57:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:01,640 INFO L481 AbstractCegarLoop]: Abstraction has 1734 states and 2447 transitions. [2020-10-28 18:57:01,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2447 transitions. [2020-10-28 18:57:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:57:01,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:01,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:01,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:57:01,643 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:01,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2138978740, now seen corresponding path program 1 times [2020-10-28 18:57:01,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:01,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275478837] [2020-10-28 18:57:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:01,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:01,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:01,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:01,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:01,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:01,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:03,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:06,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:06,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:57:06,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:57:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:57:06,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:06,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 18:57:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 18:57:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:07,343 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:57:07,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:07,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:07,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:07,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:07,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:07,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:57:07,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:07,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:07,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:07,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:07,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:07,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:07,374 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 18:57:07,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275478837] [2020-10-28 18:57:07,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:07,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:07,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868491138] [2020-10-28 18:57:07,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:07,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:07,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:07,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:07,376 INFO L87 Difference]: Start difference. First operand 1734 states and 2447 transitions. Second operand 4 states. [2020-10-28 18:57:09,587 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 18:57:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:10,019 INFO L93 Difference]: Finished difference Result 4407 states and 6298 transitions. [2020-10-28 18:57:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:10,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 18:57:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:10,029 INFO L225 Difference]: With dead ends: 4407 [2020-10-28 18:57:10,029 INFO L226 Difference]: Without dead ends: 2942 [2020-10-28 18:57:10,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2020-10-28 18:57:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2939. [2020-10-28 18:57:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2939 states. [2020-10-28 18:57:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 4102 transitions. [2020-10-28 18:57:10,512 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 4102 transitions. Word has length 71 [2020-10-28 18:57:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:10,513 INFO L481 AbstractCegarLoop]: Abstraction has 2939 states and 4102 transitions. [2020-10-28 18:57:10,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 4102 transitions. [2020-10-28 18:57:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:57:10,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:10,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:10,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:57:10,517 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash -718413138, now seen corresponding path program 1 times [2020-10-28 18:57:10,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:10,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650373475] [2020-10-28 18:57:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:10,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:10,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:10,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:10,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:11,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:12,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:57:12,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:57:12,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2416 [2020-10-28 18:57:12,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:12,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 18:57:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:57:12,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:13,664 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:57:13,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:13,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:13,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:13,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:13,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:57:13,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:13,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:13,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:13,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:13,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:13,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:13,714 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 18:57:13,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650373475] [2020-10-28 18:57:13,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:13,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:13,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733090539] [2020-10-28 18:57:13,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:13,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:13,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:13,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:13,716 INFO L87 Difference]: Start difference. First operand 2939 states and 4102 transitions. Second operand 4 states. [2020-10-28 18:57:14,400 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:57:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:16,787 INFO L93 Difference]: Finished difference Result 6865 states and 9746 transitions. [2020-10-28 18:57:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:16,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:57:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:16,803 INFO L225 Difference]: With dead ends: 6865 [2020-10-28 18:57:16,803 INFO L226 Difference]: Without dead ends: 4814 [2020-10-28 18:57:16,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2020-10-28 18:57:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4571. [2020-10-28 18:57:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4571 states. [2020-10-28 18:57:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 6430 transitions. [2020-10-28 18:57:17,637 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 6430 transitions. Word has length 72 [2020-10-28 18:57:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:17,637 INFO L481 AbstractCegarLoop]: Abstraction has 4571 states and 6430 transitions. [2020-10-28 18:57:17,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 6430 transitions. [2020-10-28 18:57:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:57:17,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:17,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:17,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:57:17,642 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 45909317, now seen corresponding path program 1 times [2020-10-28 18:57:17,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:17,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381071850] [2020-10-28 18:57:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:17,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:17,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:17,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:18,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:18,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:18,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:57:18,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:57:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-28 18:57:18,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:18,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:57:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:57:18,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:19,591 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:57:19,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:19,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:19,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:19,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:19,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:19,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:57:19,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:19,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:19,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:19,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:19,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:19,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:19,630 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 18:57:19,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381071850] [2020-10-28 18:57:19,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:19,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:19,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504356275] [2020-10-28 18:57:19,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:19,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:19,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:19,633 INFO L87 Difference]: Start difference. First operand 4571 states and 6430 transitions. Second operand 4 states. [2020-10-28 18:57:20,317 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:57:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:23,376 INFO L93 Difference]: Finished difference Result 11553 states and 16402 transitions. [2020-10-28 18:57:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:23,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 18:57:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:23,400 INFO L225 Difference]: With dead ends: 11553 [2020-10-28 18:57:23,400 INFO L226 Difference]: Without dead ends: 7870 [2020-10-28 18:57:23,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7870 states. [2020-10-28 18:57:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7870 to 7243. [2020-10-28 18:57:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7243 states. [2020-10-28 18:57:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7243 states to 7243 states and 10190 transitions. [2020-10-28 18:57:24,707 INFO L78 Accepts]: Start accepts. Automaton has 7243 states and 10190 transitions. Word has length 73 [2020-10-28 18:57:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:24,708 INFO L481 AbstractCegarLoop]: Abstraction has 7243 states and 10190 transitions. [2020-10-28 18:57:24,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7243 states and 10190 transitions. [2020-10-28 18:57:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:57:24,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:24,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:24,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:57:24,711 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:24,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1154962273, now seen corresponding path program 1 times [2020-10-28 18:57:24,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:24,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242505566] [2020-10-28 18:57:24,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:24,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:24,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:24,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:25,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:25,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:57:25,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:57:25,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-28 18:57:25,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:25,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:25,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:25,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 18:57:25,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 18:57:25,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:26,168 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:57:26,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:26,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:26,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:26,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:26,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:26,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:57:26,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:26,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:26,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:26,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:26,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:26,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:26,213 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 18:57:26,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242505566] [2020-10-28 18:57:26,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:26,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:26,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713861915] [2020-10-28 18:57:26,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:26,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:26,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:26,215 INFO L87 Difference]: Start difference. First operand 7243 states and 10190 transitions. Second operand 4 states. [2020-10-28 18:57:26,913 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:57:30,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:30,916 INFO L93 Difference]: Finished difference Result 18801 states and 26482 transitions. [2020-10-28 18:57:30,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:30,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 18:57:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:30,944 INFO L225 Difference]: With dead ends: 18801 [2020-10-28 18:57:30,944 INFO L226 Difference]: Without dead ends: 12342 [2020-10-28 18:57:30,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12342 states. [2020-10-28 18:57:33,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12342 to 11091. [2020-10-28 18:57:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11091 states. [2020-10-28 18:57:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 15422 transitions. [2020-10-28 18:57:33,208 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 15422 transitions. Word has length 74 [2020-10-28 18:57:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:33,209 INFO L481 AbstractCegarLoop]: Abstraction has 11091 states and 15422 transitions. [2020-10-28 18:57:33,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 15422 transitions. [2020-10-28 18:57:33,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:57:33,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:33,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:33,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:57:33,212 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:33,213 INFO L82 PathProgramCache]: Analyzing trace with hash 515453143, now seen corresponding path program 1 times [2020-10-28 18:57:33,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:33,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039388300] [2020-10-28 18:57:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:33,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:33,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:33,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:33,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:33,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:33,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:33,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:33,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:34,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:34,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:57:34,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:57:34,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1101 [2020-10-28 18:57:34,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:34,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:34,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:57:34,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:57:34,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:57:34,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:35,027 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:57:35,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:35,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:35,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:35,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:35,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:35,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:57:35,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:35,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:35,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:35,083 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 18:57:35,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039388300] [2020-10-28 18:57:35,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:35,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:57:35,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508181332] [2020-10-28 18:57:35,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:57:35,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:35,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:57:35,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:57:35,085 INFO L87 Difference]: Start difference. First operand 11091 states and 15422 transitions. Second operand 6 states. [2020-10-28 18:57:37,852 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-28 18:57:38,586 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:57:39,259 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:57:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:41,769 INFO L93 Difference]: Finished difference Result 16491 states and 22815 transitions. [2020-10-28 18:57:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:57:41,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-28 18:57:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:41,792 INFO L225 Difference]: With dead ends: 16491 [2020-10-28 18:57:41,793 INFO L226 Difference]: Without dead ends: 10450 [2020-10-28 18:57:41,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:57:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10450 states. [2020-10-28 18:57:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10450 to 8067. [2020-10-28 18:57:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8067 states. [2020-10-28 18:57:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8067 states to 8067 states and 11011 transitions. [2020-10-28 18:57:43,503 INFO L78 Accepts]: Start accepts. Automaton has 8067 states and 11011 transitions. Word has length 74 [2020-10-28 18:57:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:43,504 INFO L481 AbstractCegarLoop]: Abstraction has 8067 states and 11011 transitions. [2020-10-28 18:57:43,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:57:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8067 states and 11011 transitions. [2020-10-28 18:57:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 18:57:43,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:43,505 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:43,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:57:43,506 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:43,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:43,506 INFO L82 PathProgramCache]: Analyzing trace with hash 898598214, now seen corresponding path program 1 times [2020-10-28 18:57:43,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:43,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968478616] [2020-10-28 18:57:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:43,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:44,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:44,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 18:57:44,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:57:44,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-28 18:57:44,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:44,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:57:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:57:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:57:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:44,819 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:57:44,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:44,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:44,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:44,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:44,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:44,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 18:57:44,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:44,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:44,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:57:44,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:44,886 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 18:57:44,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968478616] [2020-10-28 18:57:44,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:44,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:57:44,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564579599] [2020-10-28 18:57:44,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:57:44,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:44,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:57:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:57:44,888 INFO L87 Difference]: Start difference. First operand 8067 states and 11011 transitions. Second operand 6 states. [2020-10-28 18:57:45,700 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:57:47,755 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 18:57:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:50,456 INFO L93 Difference]: Finished difference Result 21873 states and 30086 transitions. [2020-10-28 18:57:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:57:50,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-28 18:57:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:50,481 INFO L225 Difference]: With dead ends: 21873 [2020-10-28 18:57:50,481 INFO L226 Difference]: Without dead ends: 14132 [2020-10-28 18:57:50,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:57:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14132 states. [2020-10-28 18:57:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14132 to 14098. [2020-10-28 18:57:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14098 states. [2020-10-28 18:57:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14098 states to 14098 states and 19286 transitions. [2020-10-28 18:57:53,510 INFO L78 Accepts]: Start accepts. Automaton has 14098 states and 19286 transitions. Word has length 75 [2020-10-28 18:57:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:53,510 INFO L481 AbstractCegarLoop]: Abstraction has 14098 states and 19286 transitions. [2020-10-28 18:57:53,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:57:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 14098 states and 19286 transitions. [2020-10-28 18:57:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 18:57:53,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:53,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:53,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:57:53,513 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:53,514 INFO L82 PathProgramCache]: Analyzing trace with hash -14395499, now seen corresponding path program 1 times [2020-10-28 18:57:53,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:53,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521337412] [2020-10-28 18:57:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:53,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:53,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:54,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:54,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 18:57:54,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:57:54,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-28 18:57:54,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:54,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:57:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:57:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:57:54,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:54,733 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:57:54,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:54,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:54,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:54,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:54,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:54,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 18:57:54,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:54,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:57:54,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:54,813 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 18:57:54,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521337412] [2020-10-28 18:57:54,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:54,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:57:54,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576733735] [2020-10-28 18:57:54,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:57:54,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:54,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:57:54,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:57:54,816 INFO L87 Difference]: Start difference. First operand 14098 states and 19286 transitions. Second operand 6 states. [2020-10-28 18:57:55,511 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:57:57,668 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:58:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:02,904 INFO L93 Difference]: Finished difference Result 40980 states and 56348 transitions. [2020-10-28 18:58:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:58:02,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-28 18:58:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:02,940 INFO L225 Difference]: With dead ends: 40980 [2020-10-28 18:58:02,941 INFO L226 Difference]: Without dead ends: 27111 [2020-10-28 18:58:02,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:58:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27111 states. [2020-10-28 18:58:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27111 to 26999. [2020-10-28 18:58:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26999 states. [2020-10-28 18:58:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26999 states to 26999 states and 36977 transitions. [2020-10-28 18:58:08,794 INFO L78 Accepts]: Start accepts. Automaton has 26999 states and 36977 transitions. Word has length 76 [2020-10-28 18:58:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:08,795 INFO L481 AbstractCegarLoop]: Abstraction has 26999 states and 36977 transitions. [2020-10-28 18:58:08,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:58:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 26999 states and 36977 transitions. [2020-10-28 18:58:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 18:58:08,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:08,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:08,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:58:08,799 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:08,800 INFO L82 PathProgramCache]: Analyzing trace with hash 406228584, now seen corresponding path program 1 times [2020-10-28 18:58:08,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:08,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073276551] [2020-10-28 18:58:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:08,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:08,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:08,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:08,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:11,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:11,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 18:58:11,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:58:11,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2394 [2020-10-28 18:58:11,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:11,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:58:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:58:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:58:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:11,925 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:58:11,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:11,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:11,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:11,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:11,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:11,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:58:11,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:11,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:11,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:11,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:11,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:11,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:11,959 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 18:58:11,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073276551] [2020-10-28 18:58:11,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:11,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:58:11,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56862474] [2020-10-28 18:58:11,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:58:11,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:11,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:58:11,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:58:11,961 INFO L87 Difference]: Start difference. First operand 26999 states and 36977 transitions. Second operand 8 states. [2020-10-28 18:58:12,698 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:58:15,681 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:58:16,533 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:58:17,310 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 18:58:22,926 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 295