/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=DEEPEST --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_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:23:42,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:23:42,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:23:42,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:23:42,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:23:42,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:23:42,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:23:42,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:23:42,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:23:42,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:23:42,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:23:42,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:23:42,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:23:42,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:23:42,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:23:42,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:23:42,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:23:42,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:23:42,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:23:42,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:23:42,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:23:42,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:23:42,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:23:43,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:23:43,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:23:43,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:23:43,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:23:43,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:23:43,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:23:43,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:23:43,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:23:43,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:23:43,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:23:43,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:23:43,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:23:43,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:23:43,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:23:43,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:23:43,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:23:43,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:23:43,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:23:43,020 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 [2020-10-27 23:23:43,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:23:43,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:23:43,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:23:43,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:23:43,049 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:23:43,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:23:43,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:23:43,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:23:43,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:23:43,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:23:43,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:23:43,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:23:43,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:23:43,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:23:43,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:23:43,051 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:23:43,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:23:43,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:23:43,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:23:43,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:23:43,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:23:43,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:23:43,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:23:43,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:23:43,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:23:43,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:23:43,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:23:43,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:23:43,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:23:43,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:23:43,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:23:43,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:23:43,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:23:43,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:23:43,547 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:23:43,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 23:23:43,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d1c8e065/0345fe98a1794882b35a31a4c6a7fe1e/FLAG72391e6bd [2020-10-27 23:23:44,339 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:23:44,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 23:23:44,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d1c8e065/0345fe98a1794882b35a31a4c6a7fe1e/FLAG72391e6bd [2020-10-27 23:23:44,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d1c8e065/0345fe98a1794882b35a31a4c6a7fe1e [2020-10-27 23:23:44,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:23:44,574 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:23:44,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:23:44,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:23:44,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:23:44,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:23:44" (1/1) ... [2020-10-27 23:23:44,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@494bc2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:44, skipping insertion in model container [2020-10-27 23:23:44,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:23:44" (1/1) ... [2020-10-27 23:23:44,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:23:44,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:23:44,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:23:44,910 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:23:45,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:23:45,105 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:23:45,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45 WrapperNode [2020-10-27 23:23:45,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:23:45,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:23:45,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:23:45,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:23:45,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45" (1/1) ... [2020-10-27 23:23:45,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45" (1/1) ... [2020-10-27 23:23:45,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45" (1/1) ... [2020-10-27 23:23:45,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45" (1/1) ... [2020-10-27 23:23:45,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45" (1/1) ... [2020-10-27 23:23:45,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45" (1/1) ... [2020-10-27 23:23:45,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45" (1/1) ... [2020-10-27 23:23:45,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:23:45,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:23:45,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:23:45,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:23:45,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45" (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 [2020-10-27 23:23:45,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:23:45,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:23:45,271 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:23:45,271 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:23:45,271 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:23:45,272 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:23:45,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:23:45,273 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:23:45,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:23:45,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:23:45,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:23:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:23:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:23:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:23:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:23:45,276 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:23:45,276 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:23:45,276 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:23:45,277 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:23:45,277 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:23:45,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:23:45,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:23:45,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:23:45,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:23:45,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:23:45,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:23:45,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:23:46,208 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:23:46,209 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:23:46,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:23:46 BoogieIcfgContainer [2020-10-27 23:23:46,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:23:46,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:23:46,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:23:46,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:23:46,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:23:44" (1/3) ... [2020-10-27 23:23:46,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7199728d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:23:46, skipping insertion in model container [2020-10-27 23:23:46,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:45" (2/3) ... [2020-10-27 23:23:46,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7199728d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:23:46, skipping insertion in model container [2020-10-27 23:23:46,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:23:46" (3/3) ... [2020-10-27 23:23:46,221 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 23:23:46,234 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:23:46,240 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:23:46,254 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:23:46,284 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:23:46,285 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:23:46,285 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:23:46,285 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:23:46,285 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:23:46,285 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:23:46,285 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:23:46,285 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:23:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2020-10-27 23:23:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 23:23:46,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:46,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:46,320 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1717592954, now seen corresponding path program 1 times [2020-10-27 23:23:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:46,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836014200] [2020-10-27 23:23:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:46,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:46,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:47,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:49,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:49,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 23:23:49,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:23:49,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2605 [2020-10-27 23:23:49,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:23:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 23:23:49,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:23:49,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:23:49,773 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:23:49,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:49,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:49,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:49,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:49,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 23:23:49,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:49,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:23:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:23:49,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836014200] [2020-10-27 23:23:49,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:49,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:23:49,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481787497] [2020-10-27 23:23:49,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:23:49,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:49,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:23:49,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:23:49,923 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 6 states. [2020-10-27 23:23:50,336 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:23:51,686 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:23:51,986 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:23:52,478 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:23:52,820 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:23:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:52,919 INFO L93 Difference]: Finished difference Result 642 states and 1079 transitions. [2020-10-27 23:23:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:23:52,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-10-27 23:23:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:52,941 INFO L225 Difference]: With dead ends: 642 [2020-10-27 23:23:52,941 INFO L226 Difference]: Without dead ends: 532 [2020-10-27 23:23:52,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:23:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-27 23:23:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 213. [2020-10-27 23:23:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 23:23:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 338 transitions. [2020-10-27 23:23:53,062 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 338 transitions. Word has length 62 [2020-10-27 23:23:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:53,063 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 338 transitions. [2020-10-27 23:23:53,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:23:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 338 transitions. [2020-10-27 23:23:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 23:23:53,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:53,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:53,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:23:53,074 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash -204459959, now seen corresponding path program 1 times [2020-10-27 23:23:53,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:53,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174667877] [2020-10-27 23:23:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:53,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:53,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:53,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:53,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:53,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:56,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:56,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 23:23:56,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:23:56,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3073 [2020-10-27 23:23:56,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:56,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:23:56,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:23:56,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:23:56,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 23:23:56,606 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:23:56,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:56,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:56,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:56,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:56,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:56,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 23:23:56,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:56,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:56,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:56,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:56,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:23:56,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174667877] [2020-10-27 23:23:56,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:56,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:23:56,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98739122] [2020-10-27 23:23:56,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:23:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:56,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:23:56,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:23:56,707 INFO L87 Difference]: Start difference. First operand 213 states and 338 transitions. Second operand 7 states. [2020-10-27 23:23:57,111 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 23:23:58,247 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:23:58,617 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:23:58,962 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:23:59,344 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 23:23:59,697 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:24:00,381 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 23:24:00,903 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:24:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:00,928 INFO L93 Difference]: Finished difference Result 1302 states and 2159 transitions. [2020-10-27 23:24:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 23:24:00,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-10-27 23:24:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:00,937 INFO L225 Difference]: With dead ends: 1302 [2020-10-27 23:24:00,937 INFO L226 Difference]: Without dead ends: 1147 [2020-10-27 23:24:00,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-27 23:24:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2020-10-27 23:24:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 606. [2020-10-27 23:24:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-10-27 23:24:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 999 transitions. [2020-10-27 23:24:01,018 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 999 transitions. Word has length 63 [2020-10-27 23:24:01,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:01,019 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 999 transitions. [2020-10-27 23:24:01,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:24:01,019 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 999 transitions. [2020-10-27 23:24:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:24:01,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:01,028 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] [2020-10-27 23:24:01,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:24:01,029 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:01,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:01,030 INFO L82 PathProgramCache]: Analyzing trace with hash 482740595, now seen corresponding path program 1 times [2020-10-27 23:24:01,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:01,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111368361] [2020-10-27 23:24:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:01,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:01,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:01,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:01,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:01,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:04,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:04,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:24:04,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:24:04,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3092 [2020-10-27 23:24:04,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:24:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:24:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:24:04,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:04,476 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:04,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:04,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:04,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:04,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:04,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:24:04,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:04,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:04,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:04,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:04,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:04,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111368361] [2020-10-27 23:24:04,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:04,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:24:04,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649099942] [2020-10-27 23:24:04,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:24:04,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:04,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:24:04,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:04,518 INFO L87 Difference]: Start difference. First operand 606 states and 999 transitions. Second operand 5 states. [2020-10-27 23:24:04,840 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:24:05,861 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:24:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:05,988 INFO L93 Difference]: Finished difference Result 2117 states and 3540 transitions. [2020-10-27 23:24:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:24:05,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-27 23:24:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:06,002 INFO L225 Difference]: With dead ends: 2117 [2020-10-27 23:24:06,002 INFO L226 Difference]: Without dead ends: 1616 [2020-10-27 23:24:06,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:24:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-10-27 23:24:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1105. [2020-10-27 23:24:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1105 states. [2020-10-27 23:24:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1836 transitions. [2020-10-27 23:24:06,111 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1836 transitions. Word has length 64 [2020-10-27 23:24:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:06,111 INFO L481 AbstractCegarLoop]: Abstraction has 1105 states and 1836 transitions. [2020-10-27 23:24:06,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:24:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1836 transitions. [2020-10-27 23:24:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:24:06,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:06,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:06,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:24:06,119 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:06,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:06,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1754154600, now seen corresponding path program 1 times [2020-10-27 23:24:06,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:06,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812520544] [2020-10-27 23:24:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:06,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:06,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:06,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:06,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:07,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:10,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:11,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:11,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:24:11,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:24:11,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:24:11,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:11,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:24:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 23:24:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 23:24:11,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:11,492 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:11,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:11,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:11,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:11,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:11,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:11,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:24:11,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:11,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:11,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:11,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:11,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:11,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812520544] [2020-10-27 23:24:11,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:11,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:24:11,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580758516] [2020-10-27 23:24:11,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:24:11,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:11,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:24:11,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:11,537 INFO L87 Difference]: Start difference. First operand 1105 states and 1836 transitions. Second operand 4 states. [2020-10-27 23:24:11,882 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:24:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:12,984 INFO L93 Difference]: Finished difference Result 2864 states and 4791 transitions. [2020-10-27 23:24:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:12,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-27 23:24:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:12,999 INFO L225 Difference]: With dead ends: 2864 [2020-10-27 23:24:12,999 INFO L226 Difference]: Without dead ends: 1831 [2020-10-27 23:24:13,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2020-10-27 23:24:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1828. [2020-10-27 23:24:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1828 states. [2020-10-27 23:24:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 3036 transitions. [2020-10-27 23:24:13,145 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 3036 transitions. Word has length 65 [2020-10-27 23:24:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:13,146 INFO L481 AbstractCegarLoop]: Abstraction has 1828 states and 3036 transitions. [2020-10-27 23:24:13,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:24:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 3036 transitions. [2020-10-27 23:24:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:24:13,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:13,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:13,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:24:13,149 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 452420002, now seen corresponding path program 1 times [2020-10-27 23:24:13,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:13,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441513520] [2020-10-27 23:24:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:13,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:13,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:13,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:13,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:15,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:15,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:24:15,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:24:15,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2371 [2020-10-27 23:24:15,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:15,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:24:15,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 23:24:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:24:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:15,883 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:15,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:15,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:15,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:15,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:15,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:15,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:24:15,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:15,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:15,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:15,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:15,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:15,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441513520] [2020-10-27 23:24:15,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:15,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:24:15,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829988325] [2020-10-27 23:24:15,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:24:15,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:15,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:24:15,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:15,932 INFO L87 Difference]: Start difference. First operand 1828 states and 3036 transitions. Second operand 5 states. [2020-10-27 23:24:16,300 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:24:17,266 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:24:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:17,666 INFO L93 Difference]: Finished difference Result 6991 states and 11664 transitions. [2020-10-27 23:24:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:24:17,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-27 23:24:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:17,698 INFO L225 Difference]: With dead ends: 6991 [2020-10-27 23:24:17,698 INFO L226 Difference]: Without dead ends: 5270 [2020-10-27 23:24:17,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:24:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2020-10-27 23:24:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 3518. [2020-10-27 23:24:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3518 states. [2020-10-27 23:24:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 5838 transitions. [2020-10-27 23:24:17,996 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 5838 transitions. Word has length 65 [2020-10-27 23:24:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:17,997 INFO L481 AbstractCegarLoop]: Abstraction has 3518 states and 5838 transitions. [2020-10-27 23:24:17,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:24:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 5838 transitions. [2020-10-27 23:24:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:24:17,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:17,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:17,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:24:17,999 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash -596557784, now seen corresponding path program 1 times [2020-10-27 23:24:18,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:18,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995257141] [2020-10-27 23:24:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:18,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:18,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:18,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:18,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:18,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:18,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:20,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:23,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:23,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:24:23,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:24:23,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:24:23,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:23,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:24:23,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 23:24:23,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 23:24:23,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:23,502 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:23,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:23,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:23,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:23,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:23,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:23,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:24:23,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:23,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:23,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:23,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995257141] [2020-10-27 23:24:23,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:23,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:24:23,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159207926] [2020-10-27 23:24:23,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:24:23,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:23,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:24:23,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:23,547 INFO L87 Difference]: Start difference. First operand 3518 states and 5838 transitions. Second operand 4 states. [2020-10-27 23:24:23,881 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:24:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:25,008 INFO L93 Difference]: Finished difference Result 9304 states and 15458 transitions. [2020-10-27 23:24:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:25,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-27 23:24:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:25,043 INFO L225 Difference]: With dead ends: 9304 [2020-10-27 23:24:25,043 INFO L226 Difference]: Without dead ends: 5881 [2020-10-27 23:24:25,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2020-10-27 23:24:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 5862. [2020-10-27 23:24:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5862 states. [2020-10-27 23:24:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5862 states to 5862 states and 9673 transitions. [2020-10-27 23:24:25,470 INFO L78 Accepts]: Start accepts. Automaton has 5862 states and 9673 transitions. Word has length 65 [2020-10-27 23:24:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:25,470 INFO L481 AbstractCegarLoop]: Abstraction has 5862 states and 9673 transitions. [2020-10-27 23:24:25,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:24:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 5862 states and 9673 transitions. [2020-10-27 23:24:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:24:25,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:25,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:25,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:24:25,472 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash 506581598, now seen corresponding path program 1 times [2020-10-27 23:24:25,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:25,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499515097] [2020-10-27 23:24:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:25,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:27,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:30,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:30,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:24:30,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:24:30,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:24:30,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:24:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 23:24:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 23:24:30,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:30,859 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:30,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:30,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:30,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:30,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:30,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:30,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:24:30,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:30,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:30,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:30,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:30,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:30,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499515097] [2020-10-27 23:24:30,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:30,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:24:30,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746484989] [2020-10-27 23:24:30,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:24:30,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:30,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:24:30,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:30,905 INFO L87 Difference]: Start difference. First operand 5862 states and 9673 transitions. Second operand 4 states. [2020-10-27 23:24:31,225 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:24:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:32,429 INFO L93 Difference]: Finished difference Result 15356 states and 25325 transitions. [2020-10-27 23:24:32,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:32,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-27 23:24:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:32,487 INFO L225 Difference]: With dead ends: 15356 [2020-10-27 23:24:32,487 INFO L226 Difference]: Without dead ends: 9567 [2020-10-27 23:24:32,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9567 states. [2020-10-27 23:24:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9567 to 9549. [2020-10-27 23:24:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9549 states. [2020-10-27 23:24:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9549 states to 9549 states and 15614 transitions. [2020-10-27 23:24:33,268 INFO L78 Accepts]: Start accepts. Automaton has 9549 states and 15614 transitions. Word has length 65 [2020-10-27 23:24:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:33,268 INFO L481 AbstractCegarLoop]: Abstraction has 9549 states and 15614 transitions. [2020-10-27 23:24:33,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:24:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 9549 states and 15614 transitions. [2020-10-27 23:24:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:24:33,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:33,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:33,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:24:33,274 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2039953586, now seen corresponding path program 1 times [2020-10-27 23:24:33,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:33,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444952117] [2020-10-27 23:24:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:33,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:33,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:33,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:33,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:34,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:34,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:24:34,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:24:34,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-27 23:24:34,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:34,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:24:34,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 23:24:34,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:24:34,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:34,884 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:34,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:34,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:34,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:34,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:34,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:34,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:24:34,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:34,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:34,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:34,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:34,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:34,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444952117] [2020-10-27 23:24:34,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:34,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:24:34,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949251043] [2020-10-27 23:24:34,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:24:34,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:34,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:24:34,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:24:34,959 INFO L87 Difference]: Start difference. First operand 9549 states and 15614 transitions. Second operand 6 states. [2020-10-27 23:24:35,356 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 23:24:36,503 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:24:36,872 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:24:37,415 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:24:37,789 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 23:24:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:38,641 INFO L93 Difference]: Finished difference Result 29531 states and 48362 transitions. [2020-10-27 23:24:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:24:38,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 23:24:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:38,699 INFO L225 Difference]: With dead ends: 29531 [2020-10-27 23:24:38,699 INFO L226 Difference]: Without dead ends: 20040 [2020-10-27 23:24:38,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:24:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20040 states. [2020-10-27 23:24:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20040 to 9549. [2020-10-27 23:24:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9549 states. [2020-10-27 23:24:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9549 states to 9549 states and 15550 transitions. [2020-10-27 23:24:39,566 INFO L78 Accepts]: Start accepts. Automaton has 9549 states and 15550 transitions. Word has length 67 [2020-10-27 23:24:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:39,567 INFO L481 AbstractCegarLoop]: Abstraction has 9549 states and 15550 transitions. [2020-10-27 23:24:39,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:24:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 9549 states and 15550 transitions. [2020-10-27 23:24:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 23:24:39,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:39,568 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] [2020-10-27 23:24:39,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:24:39,568 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1012908191, now seen corresponding path program 1 times [2020-10-27 23:24:39,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:39,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289973678] [2020-10-27 23:24:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:39,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:39,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:39,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:39,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:39,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:40,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:40,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 23:24:40,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:24:40,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 772 [2020-10-27 23:24:40,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:40,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:24:40,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:24:40,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:24:40,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:40,752 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:40,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:40,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:40,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:40,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:40,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:40,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:24:40,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:40,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:40,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289973678] [2020-10-27 23:24:40,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:40,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:24:40,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731471916] [2020-10-27 23:24:40,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:24:40,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:40,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:24:40,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:40,783 INFO L87 Difference]: Start difference. First operand 9549 states and 15550 transitions. Second operand 4 states. [2020-10-27 23:24:41,135 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:24:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:42,245 INFO L93 Difference]: Finished difference Result 21597 states and 35144 transitions. [2020-10-27 23:24:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:42,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-27 23:24:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:42,278 INFO L225 Difference]: With dead ends: 21597 [2020-10-27 23:24:42,278 INFO L226 Difference]: Without dead ends: 12106 [2020-10-27 23:24:42,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2020-10-27 23:24:43,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 12103. [2020-10-27 23:24:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12103 states. [2020-10-27 23:24:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12103 states to 12103 states and 19612 transitions. [2020-10-27 23:24:43,370 INFO L78 Accepts]: Start accepts. Automaton has 12103 states and 19612 transitions. Word has length 68 [2020-10-27 23:24:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:43,370 INFO L481 AbstractCegarLoop]: Abstraction has 12103 states and 19612 transitions. [2020-10-27 23:24:43,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:24:43,370 INFO L276 IsEmpty]: Start isEmpty. Operand 12103 states and 19612 transitions. [2020-10-27 23:24:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:24:43,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:43,371 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] [2020-10-27 23:24:43,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:24:43,371 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:43,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:43,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1344678036, now seen corresponding path program 1 times [2020-10-27 23:24:43,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:43,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459560912] [2020-10-27 23:24:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:43,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:44,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:45,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:45,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:24:45,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:24:45,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1904 [2020-10-27 23:24:45,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:45,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:24:45,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 23:24:45,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:24:45,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:45,632 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:45,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:45,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:45,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:45,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:45,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:45,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:24:45,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:45,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:45,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459560912] [2020-10-27 23:24:45,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:45,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:24:45,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35919661] [2020-10-27 23:24:45,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:24:45,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:24:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:45,675 INFO L87 Difference]: Start difference. First operand 12103 states and 19612 transitions. Second operand 4 states. [2020-10-27 23:24:45,999 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:24:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:47,304 INFO L93 Difference]: Finished difference Result 27321 states and 44243 transitions. [2020-10-27 23:24:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:47,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 23:24:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:47,343 INFO L225 Difference]: With dead ends: 27321 [2020-10-27 23:24:47,344 INFO L226 Difference]: Without dead ends: 15302 [2020-10-27 23:24:47,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15302 states. [2020-10-27 23:24:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15302 to 15299. [2020-10-27 23:24:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15299 states. [2020-10-27 23:24:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15299 states to 15299 states and 24674 transitions. [2020-10-27 23:24:48,378 INFO L78 Accepts]: Start accepts. Automaton has 15299 states and 24674 transitions. Word has length 70 [2020-10-27 23:24:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:48,378 INFO L481 AbstractCegarLoop]: Abstraction has 15299 states and 24674 transitions. [2020-10-27 23:24:48,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:24:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 15299 states and 24674 transitions. [2020-10-27 23:24:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 23:24:48,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:48,379 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] [2020-10-27 23:24:48,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:24:48,380 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2045249151, now seen corresponding path program 1 times [2020-10-27 23:24:48,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:48,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520643464] [2020-10-27 23:24:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:48,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:48,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:48,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:48,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:48,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:48,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:50,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:51,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:51,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 23:24:51,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:24:51,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3281 [2020-10-27 23:24:51,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:24:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 23:24:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:24:51,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:52,012 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:52,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:52,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:52,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:52,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:24:52,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:52,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:52,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:52,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:52,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520643464] [2020-10-27 23:24:52,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:52,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:24:52,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438501235] [2020-10-27 23:24:52,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:24:52,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:52,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:24:52,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:52,051 INFO L87 Difference]: Start difference. First operand 15299 states and 24674 transitions. Second operand 4 states. [2020-10-27 23:24:52,389 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:24:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:54,104 INFO L93 Difference]: Finished difference Result 36460 states and 58669 transitions. [2020-10-27 23:24:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:54,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-27 23:24:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:54,159 INFO L225 Difference]: With dead ends: 36460 [2020-10-27 23:24:54,159 INFO L226 Difference]: Without dead ends: 21232 [2020-10-27 23:24:54,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21232 states. [2020-10-27 23:24:55,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21232 to 21229. [2020-10-27 23:24:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21229 states. [2020-10-27 23:24:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21229 states to 21229 states and 33663 transitions. [2020-10-27 23:24:55,784 INFO L78 Accepts]: Start accepts. Automaton has 21229 states and 33663 transitions. Word has length 72 [2020-10-27 23:24:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:55,784 INFO L481 AbstractCegarLoop]: Abstraction has 21229 states and 33663 transitions. [2020-10-27 23:24:55,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:24:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 21229 states and 33663 transitions. [2020-10-27 23:24:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 23:24:55,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:55,786 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] [2020-10-27 23:24:55,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:24:55,786 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1840568757, now seen corresponding path program 1 times [2020-10-27 23:24:55,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:55,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036804692] [2020-10-27 23:24:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:55,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:55,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:55,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:55,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:55,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:56,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:00,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:00,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 23:25:00,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:25:00,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:25:00,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:25:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 23:25:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:25:00,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:01,210 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:25:01,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:25:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:01,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:01,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:01,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:25:01,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:25:01,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:25:01,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:25:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:25:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:25:01,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:25:01,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036804692] [2020-10-27 23:25:01,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:25:01,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:25:01,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400858377] [2020-10-27 23:25:01,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:25:01,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:25:01,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:25:01,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:25:01,245 INFO L87 Difference]: Start difference. First operand 21229 states and 33663 transitions. Second operand 6 states. [2020-10-27 23:25:01,681 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 23:25:02,781 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:25:03,125 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:25:03,728 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 23:25:04,050 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:25:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:25:07,729 INFO L93 Difference]: Finished difference Result 97944 states and 156025 transitions. [2020-10-27 23:25:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:25:07,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-27 23:25:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:25:07,865 INFO L225 Difference]: With dead ends: 97944 [2020-10-27 23:25:07,866 INFO L226 Difference]: Without dead ends: 76801 [2020-10-27 23:25:07,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:25:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76801 states. [2020-10-27 23:25:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76801 to 39674. [2020-10-27 23:25:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39674 states. [2020-10-27 23:25:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39674 states to 39674 states and 62543 transitions. [2020-10-27 23:25:11,342 INFO L78 Accepts]: Start accepts. Automaton has 39674 states and 62543 transitions. Word has length 76 [2020-10-27 23:25:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:25:11,343 INFO L481 AbstractCegarLoop]: Abstraction has 39674 states and 62543 transitions. [2020-10-27 23:25:11,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:25:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 39674 states and 62543 transitions. [2020-10-27 23:25:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 23:25:11,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:25:11,344 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] [2020-10-27 23:25:11,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:25:11,344 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:25:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:25:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1163558722, now seen corresponding path program 1 times [2020-10-27 23:25:11,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:25:11,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941303739] [2020-10-27 23:25:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:25:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:11,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:11,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:11,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:11,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:12,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:12,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:16,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:16,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 23:25:16,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:25:16,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:25:16,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:25:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-27 23:25:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:25:16,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:16,744 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:25:16,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:25:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:16,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:16,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:16,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:25:16,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:25:16,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:25:16,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:16,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:25:16,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:25:16,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:25:16,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:25:16,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941303739] [2020-10-27 23:25:16,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:25:16,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:25:16,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222894106] [2020-10-27 23:25:16,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:25:16,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:25:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:25:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:25:16,769 INFO L87 Difference]: Start difference. First operand 39674 states and 62543 transitions. Second operand 5 states. [2020-10-27 23:25:21,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:25:21,777 INFO L93 Difference]: Finished difference Result 69654 states and 109151 transitions. [2020-10-27 23:25:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:25:21,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-27 23:25:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:25:21,875 INFO L225 Difference]: With dead ends: 69654 [2020-10-27 23:25:21,876 INFO L226 Difference]: Without dead ends: 69651 [2020-10-27 23:25:21,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:25:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69651 states. [2020-10-27 23:25:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69651 to 40538. [2020-10-27 23:25:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40538 states. [2020-10-27 23:25:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40538 states to 40538 states and 63389 transitions. [2020-10-27 23:25:25,785 INFO L78 Accepts]: Start accepts. Automaton has 40538 states and 63389 transitions. Word has length 77 [2020-10-27 23:25:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:25:25,785 INFO L481 AbstractCegarLoop]: Abstraction has 40538 states and 63389 transitions. [2020-10-27 23:25:25,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:25:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 40538 states and 63389 transitions. [2020-10-27 23:25:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:25:25,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:25:25,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:25:25,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:25:25,789 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:25:25,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:25:25,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1592821636, now seen corresponding path program 1 times [2020-10-27 23:25:25,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:25:25,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786944537] [2020-10-27 23:25:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:25:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:25,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:25,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:25,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:25,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:25,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:26,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:26,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:30,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:30,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:25:30,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:25:30,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:25:30,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:25:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 23:25:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 23:25:30,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:31,168 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:25:31,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:25:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:31,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:31,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:31,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:25:31,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:25:31,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:25:31,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:31,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:25:31,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:25:31,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:25:31,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:25:31,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786944537] [2020-10-27 23:25:31,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:25:31,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:25:31,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481575217] [2020-10-27 23:25:31,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:25:31,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:25:31,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:25:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:25:31,201 INFO L87 Difference]: Start difference. First operand 40538 states and 63389 transitions. Second operand 6 states. [2020-10-27 23:25:31,574 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 23:25:32,744 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:25:33,167 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:25:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:25:37,552 INFO L93 Difference]: Finished difference Result 106134 states and 166683 transitions. [2020-10-27 23:25:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 23:25:37,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-27 23:25:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:25:37,787 INFO L225 Difference]: With dead ends: 106134 [2020-10-27 23:25:37,787 INFO L226 Difference]: Without dead ends: 65682 [2020-10-27 23:25:37,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:25:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65682 states. [2020-10-27 23:25:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65682 to 65657. [2020-10-27 23:25:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65657 states. [2020-10-27 23:25:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65657 states to 65657 states and 102556 transitions. [2020-10-27 23:25:43,308 INFO L78 Accepts]: Start accepts. Automaton has 65657 states and 102556 transitions. Word has length 98 [2020-10-27 23:25:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:25:43,308 INFO L481 AbstractCegarLoop]: Abstraction has 65657 states and 102556 transitions. [2020-10-27 23:25:43,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:25:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 65657 states and 102556 transitions. [2020-10-27 23:25:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:25:43,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:25:43,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:25:43,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:25:43,312 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:25:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:25:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash 737992242, now seen corresponding path program 1 times [2020-10-27 23:25:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:25:43,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096519400] [2020-10-27 23:25:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:25:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:43,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:43,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:43,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:43,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:43,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:43,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:43,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:43,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:47,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:48,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:48,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:25:48,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:25:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:25:48,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:25:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:25:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 23:25:48,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:48,707 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:25:48,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:25:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:48,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:48,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:48,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:25:48,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:25:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:25:48,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:25:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:25:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:25:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:25:48,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096519400] [2020-10-27 23:25:48,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:25:48,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:25:48,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251019959] [2020-10-27 23:25:48,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:25:48,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:25:48,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:25:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:25:48,751 INFO L87 Difference]: Start difference. First operand 65657 states and 102556 transitions. Second operand 6 states. [2020-10-27 23:25:49,132 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 23:25:50,337 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:25:50,747 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:25:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:25:56,195 INFO L93 Difference]: Finished difference Result 106281 states and 166722 transitions. [2020-10-27 23:25:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 23:25:56,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-27 23:25:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:25:56,311 INFO L225 Difference]: With dead ends: 106281 [2020-10-27 23:25:56,311 INFO L226 Difference]: Without dead ends: 79248 [2020-10-27 23:25:56,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:25:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79248 states. [2020-10-27 23:26:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79248 to 78467. [2020-10-27 23:26:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78467 states. [2020-10-27 23:26:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78467 states to 78467 states and 122882 transitions. [2020-10-27 23:26:02,881 INFO L78 Accepts]: Start accepts. Automaton has 78467 states and 122882 transitions. Word has length 98 [2020-10-27 23:26:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:02,881 INFO L481 AbstractCegarLoop]: Abstraction has 78467 states and 122882 transitions. [2020-10-27 23:26:02,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:26:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 78467 states and 122882 transitions. [2020-10-27 23:26:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:26:02,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:02,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:26:02,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:26:02,884 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:02,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1144182715, now seen corresponding path program 1 times [2020-10-27 23:26:02,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:02,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93072584] [2020-10-27 23:26:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:02,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:02,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:02,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:03,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:03,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:03,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:03,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:07,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:07,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:07,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:07,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:26:07,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:26:07,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:26:07,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:07,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:26:07,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-27 23:26:07,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:26:07,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:08,280 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:26:08,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:08,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:08,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:08,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:08,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:08,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:26:08,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:08,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:26:08,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93072584] [2020-10-27 23:26:08,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:08,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:26:08,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779608279] [2020-10-27 23:26:08,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:26:08,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:08,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:26:08,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:26:08,325 INFO L87 Difference]: Start difference. First operand 78467 states and 122882 transitions. Second operand 4 states. [2020-10-27 23:26:10,129 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:26:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:14,895 INFO L93 Difference]: Finished difference Result 142086 states and 222990 transitions. [2020-10-27 23:26:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:26:14,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-27 23:26:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:15,015 INFO L225 Difference]: With dead ends: 142086 [2020-10-27 23:26:15,015 INFO L226 Difference]: Without dead ends: 63705 [2020-10-27 23:26:15,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63705 states. [2020-10-27 23:26:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63705 to 63650. [2020-10-27 23:26:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63650 states. [2020-10-27 23:26:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63650 states to 63650 states and 99370 transitions. [2020-10-27 23:26:20,834 INFO L78 Accepts]: Start accepts. Automaton has 63650 states and 99370 transitions. Word has length 98 [2020-10-27 23:26:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:20,835 INFO L481 AbstractCegarLoop]: Abstraction has 63650 states and 99370 transitions. [2020-10-27 23:26:20,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:26:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 63650 states and 99370 transitions. [2020-10-27 23:26:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:26:20,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:20,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:26:20,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:26:20,837 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:20,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:20,838 INFO L82 PathProgramCache]: Analyzing trace with hash 621850704, now seen corresponding path program 1 times [2020-10-27 23:26:20,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:20,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924588319] [2020-10-27 23:26:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:20,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:20,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:20,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:20,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:20,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:21,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:21,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:21,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:25,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:26:25,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:26:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:26:25,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:26:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 23:26:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:26:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:26,223 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:26:26,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:26,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:26,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:26,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:26,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:26,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:26:26,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:26,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:26,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:26,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:26:26,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924588319] [2020-10-27 23:26:26,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:26,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:26:26,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167394475] [2020-10-27 23:26:26,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:26:26,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:26,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:26:26,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:26:26,268 INFO L87 Difference]: Start difference. First operand 63650 states and 99370 transitions. Second operand 4 states. [2020-10-27 23:26:27,768 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:26:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:29,655 INFO L93 Difference]: Finished difference Result 89414 states and 139807 transitions. [2020-10-27 23:26:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:26:29,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-27 23:26:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:29,698 INFO L225 Difference]: With dead ends: 89414 [2020-10-27 23:26:29,698 INFO L226 Difference]: Without dead ends: 25850 [2020-10-27 23:26:29,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25850 states. [2020-10-27 23:26:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25850 to 25748. [2020-10-27 23:26:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25748 states. [2020-10-27 23:26:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25748 states to 25748 states and 40067 transitions. [2020-10-27 23:26:32,075 INFO L78 Accepts]: Start accepts. Automaton has 25748 states and 40067 transitions. Word has length 98 [2020-10-27 23:26:32,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:32,075 INFO L481 AbstractCegarLoop]: Abstraction has 25748 states and 40067 transitions. [2020-10-27 23:26:32,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:26:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 25748 states and 40067 transitions. [2020-10-27 23:26:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:26:32,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:32,076 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:26:32,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:26:32,077 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1761541615, now seen corresponding path program 1 times [2020-10-27 23:26:32,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:32,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878124789] [2020-10-27 23:26:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:32,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:32,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:32,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:32,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:32,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:32,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:32,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:36,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:36,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:37,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:37,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:26:37,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:26:37,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:26:37,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:26:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:26:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 23:26:37,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:37,477 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:26:37,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:37,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:37,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:37,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:37,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:37,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:26:37,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:37,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:37,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:37,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:37,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:26:37,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878124789] [2020-10-27 23:26:37,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:26:37,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:26:37,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122374995] [2020-10-27 23:26:37,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:26:37,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:37,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:26:37,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:26:37,517 INFO L87 Difference]: Start difference. First operand 25748 states and 40067 transitions. Second operand 6 states. [2020-10-27 23:26:37,909 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 23:26:39,078 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:26:39,450 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:26:39,816 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:26:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:43,781 INFO L93 Difference]: Finished difference Result 70318 states and 109459 transitions. [2020-10-27 23:26:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:26:43,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-27 23:26:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:43,847 INFO L225 Difference]: With dead ends: 70318 [2020-10-27 23:26:43,847 INFO L226 Difference]: Without dead ends: 44657 [2020-10-27 23:26:43,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:26:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44657 states. [2020-10-27 23:26:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44657 to 37160. [2020-10-27 23:26:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37160 states. [2020-10-27 23:26:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37160 states to 37160 states and 57795 transitions. [2020-10-27 23:26:47,618 INFO L78 Accepts]: Start accepts. Automaton has 37160 states and 57795 transitions. Word has length 98 [2020-10-27 23:26:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:47,618 INFO L481 AbstractCegarLoop]: Abstraction has 37160 states and 57795 transitions. [2020-10-27 23:26:47,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:26:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 37160 states and 57795 transitions. [2020-10-27 23:26:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 23:26:47,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:47,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:26:47,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:26:47,621 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash -245352061, now seen corresponding path program 1 times [2020-10-27 23:26:47,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:47,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924686157] [2020-10-27 23:26:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:47,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:47,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:47,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:47,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:47,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:48,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:52,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:52,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 23:26:52,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:26:52,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:26:52,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:26:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:26:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 23:26:52,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:53,046 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:26:53,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:53,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:53,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 23:26:53,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924686157] [2020-10-27 23:26:53,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:53,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:26:53,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245280427] [2020-10-27 23:26:53,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:26:53,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:53,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:26:53,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:53,094 INFO L87 Difference]: Start difference. First operand 37160 states and 57795 transitions. Second operand 5 states. [2020-10-27 23:26:53,464 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 23:26:54,502 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:26:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:59,538 INFO L93 Difference]: Finished difference Result 89710 states and 139043 transitions. [2020-10-27 23:26:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:26:59,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-27 23:26:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:59,615 INFO L225 Difference]: With dead ends: 89710 [2020-10-27 23:26:59,615 INFO L226 Difference]: Without dead ends: 52637 [2020-10-27 23:26:59,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:26:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52637 states. [2020-10-27 23:27:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52637 to 39081. [2020-10-27 23:27:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39081 states. [2020-10-27 23:27:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39081 states to 39081 states and 60620 transitions. [2020-10-27 23:27:03,512 INFO L78 Accepts]: Start accepts. Automaton has 39081 states and 60620 transitions. Word has length 99 [2020-10-27 23:27:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:03,512 INFO L481 AbstractCegarLoop]: Abstraction has 39081 states and 60620 transitions. [2020-10-27 23:27:03,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 39081 states and 60620 transitions. [2020-10-27 23:27:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 23:27:03,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:03,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:03,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 23:27:03,513 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:03,514 INFO L82 PathProgramCache]: Analyzing trace with hash -503547573, now seen corresponding path program 1 times [2020-10-27 23:27:03,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:03,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610982567] [2020-10-27 23:27:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:03,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:08,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:08,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 23:27:08,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:27:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:27:08,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 23:27:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 23:27:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:08,865 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:27:08,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:08,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:08,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:08,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:08,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:08,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:27:08,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:08,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:08,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:08,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:08,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:27:08,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610982567] [2020-10-27 23:27:08,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:08,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:08,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566314485] [2020-10-27 23:27:08,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:08,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:08,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:08,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:08,908 INFO L87 Difference]: Start difference. First operand 39081 states and 60620 transitions. Second operand 4 states. [2020-10-27 23:27:09,243 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:27:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:16,208 INFO L93 Difference]: Finished difference Result 110766 states and 171993 transitions. [2020-10-27 23:27:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:16,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-27 23:27:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:16,318 INFO L225 Difference]: With dead ends: 110766 [2020-10-27 23:27:16,318 INFO L226 Difference]: Without dead ends: 72860 [2020-10-27 23:27:16,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72860 states. [2020-10-27 23:27:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72860 to 72688. [2020-10-27 23:27:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72688 states. [2020-10-27 23:27:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72688 states to 72688 states and 112688 transitions. [2020-10-27 23:27:23,505 INFO L78 Accepts]: Start accepts. Automaton has 72688 states and 112688 transitions. Word has length 99 [2020-10-27 23:27:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:23,506 INFO L481 AbstractCegarLoop]: Abstraction has 72688 states and 112688 transitions. [2020-10-27 23:27:23,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 72688 states and 112688 transitions. [2020-10-27 23:27:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 23:27:23,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:23,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:23,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 23:27:23,508 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1484187975, now seen corresponding path program 1 times [2020-10-27 23:27:23,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:23,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206159859] [2020-10-27 23:27:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:23,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:23,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:23,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:23,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:23,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:23,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking...