/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=SHALLOWEST --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/systemc/mem_slave_tlm.1.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 06:31:09,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:31:09,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:31:09,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:31:09,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:31:09,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:31:09,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:31:09,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:31:09,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:31:09,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:31:09,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:31:09,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:31:09,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:31:09,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:31:09,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:31:09,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:31:09,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:31:09,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:31:09,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:31:09,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:31:09,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:31:09,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:31:09,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:31:09,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:31:09,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:31:09,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:31:09,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:31:09,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:31:09,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:31:09,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:31:09,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:31:09,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:31:09,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:31:09,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:31:09,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:31:09,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:31:09,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:31:09,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:31:09,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:31:09,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:31:09,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:31:09,501 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 06:31:09,551 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:31:09,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:31:09,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:31:09,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:31:09,557 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:31:09,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:31:09,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:31:09,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:31:09,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:31:09,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:31:09,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:31:09,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:31:09,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:31:09,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:31:09,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:31:09,560 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:31:09,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:31:09,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:31:09,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:31:09,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:31:09,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:31:09,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:31:09,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:31:09,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:31:09,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:31:09,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:31:09,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:31:09,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:31:09,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:31:09,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:31:09,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:31:10,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:31:10,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:31:10,037 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:31:10,037 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:31:10,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/mem_slave_tlm.1.cil.c [2020-10-27 06:31:10,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed015b556/3393889d6c0d4761afbdbf06da1090e3/FLAGa73f7be3c [2020-10-27 06:31:10,812 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:31:10,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/mem_slave_tlm.1.cil.c [2020-10-27 06:31:10,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed015b556/3393889d6c0d4761afbdbf06da1090e3/FLAGa73f7be3c [2020-10-27 06:31:11,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed015b556/3393889d6c0d4761afbdbf06da1090e3 [2020-10-27 06:31:11,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:31:11,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:31:11,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:31:11,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:31:11,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:31:11,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:31:11" (1/1) ... [2020-10-27 06:31:11,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f78a2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11, skipping insertion in model container [2020-10-27 06:31:11,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:31:11" (1/1) ... [2020-10-27 06:31:11,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:31:11,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:31:11,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:31:11,539 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:31:11,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:31:11,768 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:31:11,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11 WrapperNode [2020-10-27 06:31:11,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:31:11,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:31:11,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:31:11,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:31:11,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11" (1/1) ... [2020-10-27 06:31:11,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11" (1/1) ... [2020-10-27 06:31:11,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11" (1/1) ... [2020-10-27 06:31:11,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11" (1/1) ... [2020-10-27 06:31:11,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11" (1/1) ... [2020-10-27 06:31:11,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11" (1/1) ... [2020-10-27 06:31:11,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11" (1/1) ... [2020-10-27 06:31:11,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:31:11,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:31:11,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:31:11,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:31:11,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11" (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 06:31:11,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:31:11,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:31:11,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:31:11,965 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-27 06:31:11,965 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2020-10-27 06:31:11,965 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2020-10-27 06:31:11,965 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2020-10-27 06:31:11,966 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2020-10-27 06:31:11,966 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-27 06:31:11,966 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-27 06:31:11,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:31:11,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:31:11,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:31:11,967 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:31:11,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:31:11,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 06:31:11,968 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-27 06:31:11,968 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2020-10-27 06:31:11,968 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2020-10-27 06:31:11,968 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2020-10-27 06:31:11,969 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2020-10-27 06:31:11,969 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-27 06:31:11,969 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-27 06:31:11,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:31:11,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:31:11,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:31:11,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:31:11,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:31:11,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:31:11,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:31:13,119 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:31:13,119 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-27 06:31:13,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:31:13 BoogieIcfgContainer [2020-10-27 06:31:13,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:31:13,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:31:13,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:31:13,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:31:13,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:31:11" (1/3) ... [2020-10-27 06:31:13,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7280919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:31:13, skipping insertion in model container [2020-10-27 06:31:13,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:11" (2/3) ... [2020-10-27 06:31:13,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7280919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:31:13, skipping insertion in model container [2020-10-27 06:31:13,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:31:13" (3/3) ... [2020-10-27 06:31:13,134 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.1.cil.c [2020-10-27 06:31:13,149 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:31:13,155 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:31:13,169 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:31:13,200 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:31:13,201 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:31:13,201 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:31:13,201 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:31:13,201 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:31:13,201 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:31:13,201 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:31:13,201 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:31:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states. [2020-10-27 06:31:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 06:31:13,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:13,241 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] [2020-10-27 06:31:13,242 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash 804727503, now seen corresponding path program 1 times [2020-10-27 06:31:13,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:13,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402664383] [2020-10-27 06:31:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:13,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:13,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:13,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:13,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:14,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:14,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:15,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:15,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:15,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:15,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:16,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:16,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:18,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:18,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 06:31:18,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 06:31:18,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 06:31:18,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:18,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:31:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 06:31:18,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 06:31:18,908 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:31:18,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:18,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:18,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:18,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:18,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:18,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 06:31:18,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:18,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:18,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:18,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:18,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:19,010 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 06:31:19,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402664383] [2020-10-27 06:31:19,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:19,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:31:19,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614345385] [2020-10-27 06:31:19,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:31:19,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:31:19,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:31:19,044 INFO L87 Difference]: Start difference. First operand 302 states. Second operand 4 states. [2020-10-27 06:31:19,349 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:31:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:21,141 INFO L93 Difference]: Finished difference Result 624 states and 1105 transitions. [2020-10-27 06:31:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:31:21,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 06:31:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:21,165 INFO L225 Difference]: With dead ends: 624 [2020-10-27 06:31:21,165 INFO L226 Difference]: Without dead ends: 341 [2020-10-27 06:31:21,175 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 06:31:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-27 06:31:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 290. [2020-10-27 06:31:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-27 06:31:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 477 transitions. [2020-10-27 06:31:21,287 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 477 transitions. Word has length 41 [2020-10-27 06:31:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:21,288 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 477 transitions. [2020-10-27 06:31:21,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:31:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 477 transitions. [2020-10-27 06:31:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 06:31:21,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:21,295 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] [2020-10-27 06:31:21,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:31:21,296 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash 603109470, now seen corresponding path program 1 times [2020-10-27 06:31:21,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:21,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722604264] [2020-10-27 06:31:21,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:21,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:21,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:21,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:21,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:22,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:22,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:22,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:26,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:26,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 06:31:26,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 06:31:26,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4775 [2020-10-27 06:31:26,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 06:31:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:31:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 06:31:26,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:26,529 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:31:26,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:26,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:26,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:26,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:26,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:26,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 06:31:26,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:31:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:31:26,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:26,580 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 06:31:26,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722604264] [2020-10-27 06:31:26,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:26,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 06:31:26,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894524773] [2020-10-27 06:31:26,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 06:31:26,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:26,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 06:31:26,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:31:26,585 INFO L87 Difference]: Start difference. First operand 290 states and 477 transitions. Second operand 7 states. [2020-10-27 06:31:26,859 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:31:28,486 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 06:31:28,879 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 06:31:30,171 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 06:31:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:30,301 INFO L93 Difference]: Finished difference Result 641 states and 1013 transitions. [2020-10-27 06:31:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 06:31:30,302 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-27 06:31:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:30,309 INFO L225 Difference]: With dead ends: 641 [2020-10-27 06:31:30,309 INFO L226 Difference]: Without dead ends: 637 [2020-10-27 06:31:30,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-27 06:31:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-10-27 06:31:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 526. [2020-10-27 06:31:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-10-27 06:31:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 861 transitions. [2020-10-27 06:31:30,430 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 861 transitions. Word has length 42 [2020-10-27 06:31:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:30,431 INFO L481 AbstractCegarLoop]: Abstraction has 526 states and 861 transitions. [2020-10-27 06:31:30,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 06:31:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 861 transitions. [2020-10-27 06:31:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 06:31:30,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:30,444 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] [2020-10-27 06:31:30,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:31:30,444 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1784587609, now seen corresponding path program 1 times [2020-10-27 06:31:30,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:30,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102234861] [2020-10-27 06:31:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:30,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:30,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:30,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:30,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:31,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:31,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:31,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:31,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:31,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:31,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:33,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:33,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 06:31:33,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:31:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3190 [2020-10-27 06:31:33,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:31:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 06:31:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:33,966 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:31:33,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:33,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:33,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:33,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:33,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:33,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:31:33,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:33,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:33,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:33,995 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 06:31:33,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102234861] [2020-10-27 06:31:33,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:33,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:31:33,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044001500] [2020-10-27 06:31:33,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:31:33,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:33,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:31:33,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:31:33,998 INFO L87 Difference]: Start difference. First operand 526 states and 861 transitions. Second operand 4 states. [2020-10-27 06:31:34,248 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:31:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:36,362 INFO L93 Difference]: Finished difference Result 1437 states and 2309 transitions. [2020-10-27 06:31:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:31:36,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 06:31:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:36,373 INFO L225 Difference]: With dead ends: 1437 [2020-10-27 06:31:36,373 INFO L226 Difference]: Without dead ends: 937 [2020-10-27 06:31:36,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:31:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2020-10-27 06:31:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 842. [2020-10-27 06:31:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-10-27 06:31:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1356 transitions. [2020-10-27 06:31:36,554 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1356 transitions. Word has length 41 [2020-10-27 06:31:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:36,555 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1356 transitions. [2020-10-27 06:31:36,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:31:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1356 transitions. [2020-10-27 06:31:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 06:31:36,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:36,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:31:36,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:31:36,557 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:36,558 INFO L82 PathProgramCache]: Analyzing trace with hash -461938224, now seen corresponding path program 1 times [2020-10-27 06:31:36,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:36,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787848277] [2020-10-27 06:31:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:36,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:36,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:37,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:37,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:37,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:37,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:40,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:41,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:41,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 06:31:41,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:31:41,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 06:31:41,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:41,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 06:31:41,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:31:41,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 06:31:41,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:41,864 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:31:41,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:41,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:41,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:41,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:41,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:41,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 06:31:41,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:31:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:31:41,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:41,906 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 06:31:41,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787848277] [2020-10-27 06:31:41,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:41,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:31:41,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099839873] [2020-10-27 06:31:41,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:31:41,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:31:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:31:41,909 INFO L87 Difference]: Start difference. First operand 842 states and 1356 transitions. Second operand 5 states. [2020-10-27 06:31:42,168 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:31:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:44,548 INFO L93 Difference]: Finished difference Result 1798 states and 2867 transitions. [2020-10-27 06:31:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 06:31:44,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-27 06:31:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:44,557 INFO L225 Difference]: With dead ends: 1798 [2020-10-27 06:31:44,557 INFO L226 Difference]: Without dead ends: 982 [2020-10-27 06:31:44,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:31:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2020-10-27 06:31:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 828. [2020-10-27 06:31:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-10-27 06:31:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1336 transitions. [2020-10-27 06:31:44,689 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1336 transitions. Word has length 43 [2020-10-27 06:31:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:44,689 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1336 transitions. [2020-10-27 06:31:44,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:31:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1336 transitions. [2020-10-27 06:31:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 06:31:44,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:44,692 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 06:31:44,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 06:31:44,693 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1486998175, now seen corresponding path program 1 times [2020-10-27 06:31:44,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:44,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397401591] [2020-10-27 06:31:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:44,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:44,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:44,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:44,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:44,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:45,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:45,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:46,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:46,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:48,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:48,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:49,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:49,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:49,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:49,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:49,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:49,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 06:31:49,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 06:31:49,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 06:31:49,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:31:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 06:31:49,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:50,019 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:31:50,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:50,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:50,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:50,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:50,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:31:50,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:50,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 06:31:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:50,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:50,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:50,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:50,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:50,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 06:31:50,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:31:50,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 06:31:50,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:50,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:31:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-27 06:31:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 06:31:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:50,203 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 06:31:50,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397401591] [2020-10-27 06:31:50,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:50,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 06:31:50,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986253193] [2020-10-27 06:31:50,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 06:31:50,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 06:31:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:31:50,206 INFO L87 Difference]: Start difference. First operand 828 states and 1336 transitions. Second operand 6 states. [2020-10-27 06:31:50,474 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 06:31:50,729 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 06:31:52,035 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:31:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:31:53,941 INFO L93 Difference]: Finished difference Result 2210 states and 3580 transitions. [2020-10-27 06:31:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 06:31:53,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-10-27 06:31:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:31:53,953 INFO L225 Difference]: With dead ends: 2210 [2020-10-27 06:31:53,954 INFO L226 Difference]: Without dead ends: 1393 [2020-10-27 06:31:53,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-27 06:31:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2020-10-27 06:31:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1239. [2020-10-27 06:31:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1239 states. [2020-10-27 06:31:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1957 transitions. [2020-10-27 06:31:54,175 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1957 transitions. Word has length 62 [2020-10-27 06:31:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:31:54,176 INFO L481 AbstractCegarLoop]: Abstraction has 1239 states and 1957 transitions. [2020-10-27 06:31:54,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 06:31:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1957 transitions. [2020-10-27 06:31:54,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 06:31:54,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:54,185 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 06:31:54,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 06:31:54,185 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2114194517, now seen corresponding path program 1 times [2020-10-27 06:31:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:54,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477073090] [2020-10-27 06:31:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:54,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:55,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:55,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:55,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:55,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:59,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:59,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 06:31:59,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:31:59,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 06:31:59,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:31:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 06:31:59,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:31:59,599 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:31:59,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:59,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:59,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:59,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:59,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:59,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 06:31:59,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:59,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:59,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:59,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:59,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:31:59,763 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 06:31:59,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 06:31:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:59,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:59,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:59,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:59,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:59,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 06:31:59,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:31:59,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 06:31:59,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:31:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:31:59,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 06:31:59,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:31:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:31:59,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477073090] [2020-10-27 06:31:59,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:59,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:31:59,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820056456] [2020-10-27 06:31:59,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 06:31:59,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:59,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 06:31:59,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 06:31:59,941 INFO L87 Difference]: Start difference. First operand 1239 states and 1957 transitions. Second operand 8 states. [2020-10-27 06:32:00,255 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 06:32:01,139 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:32:01,672 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 06:32:03,923 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 06:32:04,968 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-27 06:32:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:06,268 INFO L93 Difference]: Finished difference Result 4089 states and 7096 transitions. [2020-10-27 06:32:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:32:06,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 06:32:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:06,300 INFO L225 Difference]: With dead ends: 4089 [2020-10-27 06:32:06,300 INFO L226 Difference]: Without dead ends: 2862 [2020-10-27 06:32:06,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-27 06:32:06,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2020-10-27 06:32:06,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2487. [2020-10-27 06:32:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2487 states. [2020-10-27 06:32:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 4120 transitions. [2020-10-27 06:32:06,785 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 4120 transitions. Word has length 65 [2020-10-27 06:32:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:06,785 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 4120 transitions. [2020-10-27 06:32:06,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 06:32:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 4120 transitions. [2020-10-27 06:32:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 06:32:06,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:06,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:06,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 06:32:06,791 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1600068583, now seen corresponding path program 1 times [2020-10-27 06:32:06,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:06,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751106402] [2020-10-27 06:32:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:06,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:06,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:07,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:07,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:09,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:09,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 06:32:09,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:32:09,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2536 [2020-10-27 06:32:09,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:09,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:09,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:09,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:32:09,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:09,708 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:32:09,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:09,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:09,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:09,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:09,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:09,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:32:09,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:09,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:32:09,874 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 06:32:09,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:09,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:09,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:09,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:32:09,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:09,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:32:09,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:09,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:09,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 06:32:09,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:09,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:32:09,932 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 06:32:09,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751106402] [2020-10-27 06:32:09,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:09,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:32:09,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802740081] [2020-10-27 06:32:09,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:32:09,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:09,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:32:09,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:32:09,937 INFO L87 Difference]: Start difference. First operand 2487 states and 4120 transitions. Second operand 5 states. [2020-10-27 06:32:10,210 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:32:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:12,316 INFO L93 Difference]: Finished difference Result 5195 states and 8537 transitions. [2020-10-27 06:32:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:32:12,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 06:32:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:12,340 INFO L225 Difference]: With dead ends: 5195 [2020-10-27 06:32:12,341 INFO L226 Difference]: Without dead ends: 2717 [2020-10-27 06:32:12,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:32:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2020-10-27 06:32:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2487. [2020-10-27 06:32:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2487 states. [2020-10-27 06:32:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 4119 transitions. [2020-10-27 06:32:12,750 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 4119 transitions. Word has length 75 [2020-10-27 06:32:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:12,750 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 4119 transitions. [2020-10-27 06:32:12,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:32:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 4119 transitions. [2020-10-27 06:32:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 06:32:12,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:12,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:12,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 06:32:12,756 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1478744987, now seen corresponding path program 1 times [2020-10-27 06:32:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:12,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807507079] [2020-10-27 06:32:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:12,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:12,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:13,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:13,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:13,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 06:32:13,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:32:13,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-27 06:32:13,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:32:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 06:32:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 06:32:13,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:13,690 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:32:13,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:13,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:13,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:13,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:13,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:32:13,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:13,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:13,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:13,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:13,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:13,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:32:13,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:13,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 06:32:13,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:13,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:32:13,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:13,983 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 06:32:13,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807507079] [2020-10-27 06:32:13,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:13,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 06:32:13,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611911093] [2020-10-27 06:32:13,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 06:32:13,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:13,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 06:32:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 06:32:13,990 INFO L87 Difference]: Start difference. First operand 2487 states and 4119 transitions. Second operand 10 states. [2020-10-27 06:32:14,260 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:32:14,759 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 06:32:15,082 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 06:32:15,671 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 06:32:15,971 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 06:32:17,593 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 06:32:18,084 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 06:32:18,773 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 06:32:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:20,439 INFO L93 Difference]: Finished difference Result 5953 states and 10665 transitions. [2020-10-27 06:32:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 06:32:20,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-27 06:32:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:20,476 INFO L225 Difference]: With dead ends: 5953 [2020-10-27 06:32:20,477 INFO L226 Difference]: Without dead ends: 3484 [2020-10-27 06:32:20,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-10-27 06:32:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2020-10-27 06:32:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 3088. [2020-10-27 06:32:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3088 states. [2020-10-27 06:32:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 5376 transitions. [2020-10-27 06:32:21,054 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 5376 transitions. Word has length 75 [2020-10-27 06:32:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:21,057 INFO L481 AbstractCegarLoop]: Abstraction has 3088 states and 5376 transitions. [2020-10-27 06:32:21,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 06:32:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 5376 transitions. [2020-10-27 06:32:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 06:32:21,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:21,065 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 06:32:21,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 06:32:21,066 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:21,067 INFO L82 PathProgramCache]: Analyzing trace with hash -574916951, now seen corresponding path program 1 times [2020-10-27 06:32:21,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:21,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043357303] [2020-10-27 06:32:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:21,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:21,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:21,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:21,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 06:32:21,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:32:21,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-27 06:32:21,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:21,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:32:21,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 06:32:21,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 06:32:21,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:21,825 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:32:21,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:21,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:21,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:21,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:21,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:32:21,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:21,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:21,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:21,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:21,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:21,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:21,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:21,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:32:21,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:21,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:32:21,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:21,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:21,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:21,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:32:21,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:22,085 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 06:32:22,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043357303] [2020-10-27 06:32:22,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:22,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 06:32:22,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56222038] [2020-10-27 06:32:22,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 06:32:22,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:22,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 06:32:22,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 06:32:22,087 INFO L87 Difference]: Start difference. First operand 3088 states and 5376 transitions. Second operand 10 states. [2020-10-27 06:32:22,400 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:32:22,882 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 06:32:23,204 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 06:32:25,126 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 06:32:25,411 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 06:32:25,688 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 06:32:25,881 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-27 06:32:26,216 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 06:32:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:28,168 INFO L93 Difference]: Finished difference Result 3487 states and 6008 transitions. [2020-10-27 06:32:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 06:32:28,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 06:32:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:28,200 INFO L225 Difference]: With dead ends: 3487 [2020-10-27 06:32:28,200 INFO L226 Difference]: Without dead ends: 3483 [2020-10-27 06:32:28,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-27 06:32:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2020-10-27 06:32:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 3088. [2020-10-27 06:32:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3088 states. [2020-10-27 06:32:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 5370 transitions. [2020-10-27 06:32:28,735 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 5370 transitions. Word has length 76 [2020-10-27 06:32:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:28,735 INFO L481 AbstractCegarLoop]: Abstraction has 3088 states and 5370 transitions. [2020-10-27 06:32:28,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 06:32:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 5370 transitions. [2020-10-27 06:32:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 06:32:28,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:28,744 INFO L422 BasicCegarLoop]: trace histogram [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 06:32:28,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 06:32:28,744 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash -165614767, now seen corresponding path program 1 times [2020-10-27 06:32:28,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:28,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101455950] [2020-10-27 06:32:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:28,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:28,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:28,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:28,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:32,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:32,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:32,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:33,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 06:32:33,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 06:32:33,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 06:32:33,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:32:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 06:32:33,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:34,026 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:32:34,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:34,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:34,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:34,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:34,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:34,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:32:34,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:34,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:34,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:34,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:34,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 06:32:34,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:34,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 06:32:34,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:34,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:34,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:32:34,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 06:32:34,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:34,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 06:32:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:34,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:34,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:34,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:34,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 06:32:34,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:32:34,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 06:32:34,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-27 06:32:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 06:32:34,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:32:34,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101455950] [2020-10-27 06:32:34,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:34,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 06:32:34,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588834835] [2020-10-27 06:32:34,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:32:34,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:32:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:32:34,309 INFO L87 Difference]: Start difference. First operand 3088 states and 5370 transitions. Second operand 9 states. [2020-10-27 06:32:34,561 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:32:35,226 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 06:32:35,570 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:32:36,334 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:32:38,266 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 06:32:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:44,293 INFO L93 Difference]: Finished difference Result 13787 states and 36637 transitions. [2020-10-27 06:32:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 06:32:44,294 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-27 06:32:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:44,460 INFO L225 Difference]: With dead ends: 13787 [2020-10-27 06:32:44,460 INFO L226 Difference]: Without dead ends: 10765 [2020-10-27 06:32:44,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-27 06:32:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10765 states. [2020-10-27 06:32:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10765 to 8973. [2020-10-27 06:32:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8973 states. [2020-10-27 06:32:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 20064 transitions. [2020-10-27 06:32:46,414 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 20064 transitions. Word has length 84 [2020-10-27 06:32:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:46,414 INFO L481 AbstractCegarLoop]: Abstraction has 8973 states and 20064 transitions. [2020-10-27 06:32:46,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:32:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 20064 transitions. [2020-10-27 06:32:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 06:32:46,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:46,427 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:46,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 06:32:46,427 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash -278346708, now seen corresponding path program 1 times [2020-10-27 06:32:46,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:46,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866138574] [2020-10-27 06:32:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:46,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:47,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:47,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:48,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:48,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:49,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:51,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:51,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 06:32:51,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 06:32:51,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 06:32:51,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:51,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 06:32:51,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:51,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 06:32:51,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:51,765 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:32:51,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:51,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:51,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:51,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:51,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:32:51,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:51,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:51,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:51,952 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 06:32:51,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 06:32:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:51,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:51,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:52,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:52,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:52,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 06:32:52,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:32:52,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 06:32:52,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:52,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:32:52,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:32:52,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 06:32:52,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:52,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 06:32:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:52,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:52,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:52,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 06:32:52,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:52,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:32:52,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:52,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:52,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:32:52,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:32:52,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:52,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 06:32:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:52,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:52,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:52,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 06:32:52,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:52,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 06:32:52,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:52,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:52,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:52,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 06:32:52,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:52,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 06:32:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:52,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:52,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:52,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 06:32:52,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 06:32:52,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 06:32:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 06:32:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 06:32:52,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866138574] [2020-10-27 06:32:52,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:32:52,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 06:32:52,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963161586] [2020-10-27 06:32:52,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:32:52,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:52,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:32:52,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:32:52,347 INFO L87 Difference]: Start difference. First operand 8973 states and 20064 transitions. Second operand 9 states. [2020-10-27 06:32:52,604 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 06:32:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:56,407 INFO L93 Difference]: Finished difference Result 20854 states and 68216 transitions. [2020-10-27 06:32:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 06:32:56,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-10-27 06:32:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:56,630 INFO L225 Difference]: With dead ends: 20854 [2020-10-27 06:32:56,631 INFO L226 Difference]: Without dead ends: 12309 [2020-10-27 06:32:56,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-27 06:32:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12309 states. [2020-10-27 06:32:59,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12309 to 9045. [2020-10-27 06:32:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9045 states. [2020-10-27 06:32:59,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9045 states to 9045 states and 19983 transitions. [2020-10-27 06:32:59,145 INFO L78 Accepts]: Start accepts. Automaton has 9045 states and 19983 transitions. Word has length 121 [2020-10-27 06:32:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:59,145 INFO L481 AbstractCegarLoop]: Abstraction has 9045 states and 19983 transitions. [2020-10-27 06:32:59,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:32:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 9045 states and 19983 transitions. [2020-10-27 06:32:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 06:32:59,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:59,156 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 06:32:59,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 06:32:59,157 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1701004546, now seen corresponding path program 1 times [2020-10-27 06:32:59,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:59,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238327489] [2020-10-27 06:32:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:59,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:59,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:00,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:01,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:01,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:01,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:01,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:01,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:01,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:04,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:04,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 06:33:04,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 06:33:04,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 06:33:04,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:04,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:33:04,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:33:04,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 06:33:04,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:04,440 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:33:04,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:04,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:04,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:04,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:04,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:04,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:33:04,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:04,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:04,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:04,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:04,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:04,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 06:33:04,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:04,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 06:33:04,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:04,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:04,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:33:04,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 06:33:04,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:04,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 06:33:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:04,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:04,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:04,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:04,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 06:33:04,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:33:04,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:33:04,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:04,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:33:04,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:33:04,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 06:33:04,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 06:33:04,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238327489] [2020-10-27 06:33:04,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:33:04,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 06:33:04,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797921959] [2020-10-27 06:33:04,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 06:33:04,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:04,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 06:33:04,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 06:33:04,638 INFO L87 Difference]: Start difference. First operand 9045 states and 19983 transitions. Second operand 8 states. [2020-10-27 06:33:04,888 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:33:05,148 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 06:33:05,953 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 06:33:06,418 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 06:33:06,894 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:33:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:13,638 INFO L93 Difference]: Finished difference Result 28241 states and 86677 transitions. [2020-10-27 06:33:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 06:33:13,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-27 06:33:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:14,345 INFO L225 Difference]: With dead ends: 28241 [2020-10-27 06:33:14,346 INFO L226 Difference]: Without dead ends: 19624 [2020-10-27 06:33:15,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2020-10-27 06:33:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19624 states. [2020-10-27 06:33:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19624 to 16869. [2020-10-27 06:33:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16869 states. [2020-10-27 06:33:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16869 states to 16869 states and 44209 transitions. [2020-10-27 06:33:19,193 INFO L78 Accepts]: Start accepts. Automaton has 16869 states and 44209 transitions. Word has length 89 [2020-10-27 06:33:19,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:19,193 INFO L481 AbstractCegarLoop]: Abstraction has 16869 states and 44209 transitions. [2020-10-27 06:33:19,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 06:33:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 16869 states and 44209 transitions. [2020-10-27 06:33:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 06:33:19,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:19,212 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:19,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 06:33:19,213 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:19,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1384377983, now seen corresponding path program 1 times [2020-10-27 06:33:19,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:19,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937049361] [2020-10-27 06:33:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:19,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:20,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:20,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:22,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:22,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:22,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:22,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:22,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:23,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:23,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:24,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:24,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 06:33:24,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 06:33:24,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 06:33:24,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:24,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:24,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 06:33:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 06:33:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 06:33:24,503 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:33:24,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:24,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:24,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:24,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:24,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:33:24,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:24,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:24,676 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 06:33:24,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 06:33:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:24,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:24,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:24,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:24,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:24,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:24,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 06:33:24,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 06:33:24,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 06:33:24,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:24,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:33:24,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:33:24,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 06:33:24,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:24,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 06:33:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:24,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:24,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:24,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 06:33:24,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:24,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 06:33:24,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:24,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:24,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:33:24,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:33:24,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:25,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 06:33:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:25,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:25,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:25,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:33:25,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:25,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 06:33:25,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 06:33:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:25,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:25,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 06:33:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:25,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:25,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:25,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 06:33:25,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:25,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:33:25,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 06:33:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:25,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 06:33:25,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937049361] [2020-10-27 06:33:25,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:33:25,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 06:33:25,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709444230] [2020-10-27 06:33:25,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 06:33:25,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 06:33:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 06:33:25,091 INFO L87 Difference]: Start difference. First operand 16869 states and 44209 transitions. Second operand 10 states. [2020-10-27 06:33:25,330 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:33:27,201 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 06:33:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:34,246 INFO L93 Difference]: Finished difference Result 49634 states and 167702 transitions. [2020-10-27 06:33:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 06:33:34,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-10-27 06:33:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:35,054 INFO L225 Difference]: With dead ends: 49634 [2020-10-27 06:33:35,055 INFO L226 Difference]: Without dead ends: 32783 [2020-10-27 06:33:35,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-27 06:33:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32783 states. [2020-10-27 06:33:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32783 to 30256. [2020-10-27 06:33:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30256 states. [2020-10-27 06:33:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30256 states to 30256 states and 91785 transitions. [2020-10-27 06:33:43,352 INFO L78 Accepts]: Start accepts. Automaton has 30256 states and 91785 transitions. Word has length 135 [2020-10-27 06:33:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:43,352 INFO L481 AbstractCegarLoop]: Abstraction has 30256 states and 91785 transitions. [2020-10-27 06:33:43,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 06:33:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 30256 states and 91785 transitions. [2020-10-27 06:33:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 06:33:43,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:43,374 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:43,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 06:33:43,374 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash 159924342, now seen corresponding path program 1 times [2020-10-27 06:33:43,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:43,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305049396] [2020-10-27 06:33:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:43,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:43,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:43,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:43,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:43,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:44,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:45,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:45,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:45,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:47,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:47,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:48,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 06:33:48,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:33:48,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 06:33:48,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:33:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:33:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 06:33:48,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:48,671 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:33:48,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:48,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:48,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:48,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:48,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:33:48,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:48,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:48,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:48,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:48,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:48,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:48,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:48,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:33:48,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:48,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 06:33:48,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:48,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:33:48,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:48,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 06:33:48,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:48,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-27 06:33:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:48,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:48,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 06:33:48,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:33:48,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 06:33:48,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:48,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:48,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:33:48,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 06:33:48,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:33:48,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305049396] [2020-10-27 06:33:48,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:33:48,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:33:48,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849284377] [2020-10-27 06:33:48,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 06:33:48,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 06:33:48,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 06:33:48,962 INFO L87 Difference]: Start difference. First operand 30256 states and 91785 transitions. Second operand 8 states. [2020-10-27 06:33:49,220 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:33:49,945 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 06:34:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:34:07,097 INFO L93 Difference]: Finished difference Result 86155 states and 330623 transitions. [2020-10-27 06:34:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 06:34:07,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2020-10-27 06:34:07,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:34:08,605 INFO L225 Difference]: With dead ends: 86155 [2020-10-27 06:34:08,606 INFO L226 Difference]: Without dead ends: 56197 [2020-10-27 06:34:10,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-27 06:34:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56197 states. [2020-10-27 06:34:22,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56197 to 52656. [2020-10-27 06:34:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52656 states. [2020-10-27 06:34:24,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52656 states to 52656 states and 172853 transitions. [2020-10-27 06:34:24,228 INFO L78 Accepts]: Start accepts. Automaton has 52656 states and 172853 transitions. Word has length 102 [2020-10-27 06:34:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:34:24,229 INFO L481 AbstractCegarLoop]: Abstraction has 52656 states and 172853 transitions. [2020-10-27 06:34:24,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 06:34:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 52656 states and 172853 transitions. [2020-10-27 06:34:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 06:34:24,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:34:24,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 06:34:24,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 06:34:24,246 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:34:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:34:24,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1662446909, now seen corresponding path program 1 times [2020-10-27 06:34:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:34:24,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806868673] [2020-10-27 06:34:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:34:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:24,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:24,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:24,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:24,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:24,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:24,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:25,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:25,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:26,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:26,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:29,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:29,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 06:34:29,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 06:34:29,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 06:34:29,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:29,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:34:29,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 06:34:29,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 06:34:29,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 06:34:29,527 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 06:34:29,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:34:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:29,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:29,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:29,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:34:29,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:34:29,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:34:29,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:29,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:34:29,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:34:29,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:34:29,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:29,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:34:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:29,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:29,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:29,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:34:29,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:34:29,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 06:34:29,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:29,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:34:29,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:34:29,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 06:34:29,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:29,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 06:34:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:29,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:29,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:29,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:29,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 06:34:29,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:34:29,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:34:29,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:34:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:34:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 06:34:29,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 06:34:29,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806868673] [2020-10-27 06:34:29,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:34:29,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 06:34:29,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342987555] [2020-10-27 06:34:29,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 06:34:29,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:34:29,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 06:34:29,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:34:29,778 INFO L87 Difference]: Start difference. First operand 52656 states and 172853 transitions. Second operand 7 states. [2020-10-27 06:34:30,014 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157