/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/eca-rers2012/Problem17_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:11:02,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:11:02,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:11:02,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:11:02,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:11:02,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:11:02,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:11:02,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:11:02,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:11:02,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:11:02,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:11:02,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:11:02,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:11:02,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:11:02,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:11:02,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:11:02,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:11:02,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:11:03,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:11:03,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:11:03,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:11:03,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:11:03,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:11:03,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:11:03,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:11:03,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:11:03,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:11:03,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:11:03,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:11:03,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:11:03,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:11:03,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:11:03,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:11:03,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:11:03,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:11:03,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:11:03,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:11:03,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:11:03,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:11:03,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:11:03,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:11:03,062 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 00:11:03,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:11:03,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:11:03,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:11:03,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:11:03,120 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:11:03,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:11:03,120 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:11:03,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:11:03,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:11:03,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:11:03,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:11:03,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:11:03,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:11:03,123 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:11:03,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:11:03,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:11:03,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:11:03,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:11:03,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:11:03,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:11:03,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:11:03,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:11:03,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:11:03,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:11:03,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:11:03,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:11:03,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:11:03,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:11:03,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:11:03,126 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:11:03,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:11:03,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:11:03,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:11:03,598 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:11:03,598 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:11:03,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label24.c [2020-10-27 00:11:03,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/becbed035/1b7e9fc093494701828c6468547a2cb3/FLAG190e431c3 [2020-10-27 00:11:04,598 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:11:04,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label24.c [2020-10-27 00:11:04,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/becbed035/1b7e9fc093494701828c6468547a2cb3/FLAG190e431c3 [2020-10-27 00:11:05,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/becbed035/1b7e9fc093494701828c6468547a2cb3 [2020-10-27 00:11:05,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:11:05,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:11:05,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:11:05,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:11:05,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:11:05,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:11:05" (1/1) ... [2020-10-27 00:11:05,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@879a816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:05, skipping insertion in model container [2020-10-27 00:11:05,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:11:05" (1/1) ... [2020-10-27 00:11:05,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:11:05,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:11:06,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:11:06,505 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:11:06,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:11:07,000 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:11:07,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07 WrapperNode [2020-10-27 00:11:07,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:11:07,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:11:07,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:11:07,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:11:07,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07" (1/1) ... [2020-10-27 00:11:07,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07" (1/1) ... [2020-10-27 00:11:07,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07" (1/1) ... [2020-10-27 00:11:07,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07" (1/1) ... [2020-10-27 00:11:07,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07" (1/1) ... [2020-10-27 00:11:07,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07" (1/1) ... [2020-10-27 00:11:07,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07" (1/1) ... [2020-10-27 00:11:07,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:11:07,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:11:07,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:11:07,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:11:07,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07" (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 00:11:07,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:11:07,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:11:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:11:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:11:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:11:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:11:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:11:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:11:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:11:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:11:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:11:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:11:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:11:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:11:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:11:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:11:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:11:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:11:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:11:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:11:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:11:16,673 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:11:16,674 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:11:16,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:11:16 BoogieIcfgContainer [2020-10-27 00:11:16,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:11:16,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:11:16,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:11:16,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:11:16,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:11:05" (1/3) ... [2020-10-27 00:11:16,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ac1c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:11:16, skipping insertion in model container [2020-10-27 00:11:16,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:11:07" (2/3) ... [2020-10-27 00:11:16,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ac1c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:11:16, skipping insertion in model container [2020-10-27 00:11:16,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:11:16" (3/3) ... [2020-10-27 00:11:16,693 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label24.c [2020-10-27 00:11:16,707 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:11:16,715 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:11:16,729 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:11:16,785 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:11:16,786 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:11:16,786 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:11:16,786 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:11:16,786 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:11:16,787 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:11:16,787 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:11:16,787 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:11:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:11:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 00:11:16,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:16,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:16,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash 313865979, now seen corresponding path program 1 times [2020-10-27 00:11:16,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:16,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745169912] [2020-10-27 00:11:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:17,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:18,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:18,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 00:11:18,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:18,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-27 00:11:18,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:18,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:11:18,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:18,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 00:11:18,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:11:18,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:18,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:18,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:18,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:18,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:11:18,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:18,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:18,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:18,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:18,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:18,294 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 00:11:18,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745169912] [2020-10-27 00:11:18,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:11:18,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:11:18,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695631382] [2020-10-27 00:11:18,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:11:18,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:18,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:11:18,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:11:18,326 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:11:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:33,315 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:11:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:11:33,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 00:11:33,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:33,346 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:11:33,347 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:11:33,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:11:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:11:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:11:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:11:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:11:33,500 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 67 [2020-10-27 00:11:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:33,501 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:11:33,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:11:33,501 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:11:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 00:11:33,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:33,509 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:11:33,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:11:33,510 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:33,511 INFO L82 PathProgramCache]: Analyzing trace with hash 311964026, now seen corresponding path program 1 times [2020-10-27 00:11:33,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:33,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975275899] [2020-10-27 00:11:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:33,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:34,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:34,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:36,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:37,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:37,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 00:11:37,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:11:37,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3565 [2020-10-27 00:11:37,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:37,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:11:37,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:37,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:11:37,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:11:37,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:37,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:37,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:37,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:37,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:37,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:11:37,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:37,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:37,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:37,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:37,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:11:37,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:37,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:37,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:11:37,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:37,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 00:11:37,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:37,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:37,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:37,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:11:37,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:11:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:11:37,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975275899] [2020-10-27 00:11:37,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:11:37,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:11:37,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813647490] [2020-10-27 00:11:37,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:11:37,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:11:37,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:11:37,711 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:11:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:52,549 INFO L93 Difference]: Finished difference Result 2466 states and 3913 transitions. [2020-10-27 00:11:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:11:52,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2020-10-27 00:11:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:52,560 INFO L225 Difference]: With dead ends: 2466 [2020-10-27 00:11:52,560 INFO L226 Difference]: Without dead ends: 1480 [2020-10-27 00:11:52,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:11:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-10-27 00:11:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1442. [2020-10-27 00:11:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-27 00:11:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1871 transitions. [2020-10-27 00:11:52,631 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1871 transitions. Word has length 138 [2020-10-27 00:11:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:52,631 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 1871 transitions. [2020-10-27 00:11:52,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:11:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1871 transitions. [2020-10-27 00:11:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 00:11:52,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:52,636 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:11:52,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:11:52,636 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1059269999, now seen corresponding path program 1 times [2020-10-27 00:11:52,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:52,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130626688] [2020-10-27 00:11:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:52,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:52,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:53,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:57,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:57,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 00:11:57,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:11:57,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4976 [2020-10-27 00:11:57,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:11:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:11:57,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:57,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:57,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:57,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:57,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:57,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:57,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:11:57,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:57,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:57,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:58,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:58,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:58,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:58,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:11:58,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:58,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-27 00:11:58,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:58,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:11:58,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:11:58,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:11:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130626688] [2020-10-27 00:11:58,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:58,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:11:58,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418059590] [2020-10-27 00:11:58,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:11:58,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:58,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:11:58,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:11:58,463 INFO L87 Difference]: Start difference. First operand 1442 states and 1871 transitions. Second operand 8 states. [2020-10-27 00:11:59,390 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 00:12:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:18,531 INFO L93 Difference]: Finished difference Result 3464 states and 4743 transitions. [2020-10-27 00:12:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:12:18,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 141 [2020-10-27 00:12:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:18,552 INFO L225 Difference]: With dead ends: 3464 [2020-10-27 00:12:18,552 INFO L226 Difference]: Without dead ends: 2416 [2020-10-27 00:12:18,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:12:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2020-10-27 00:12:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2363. [2020-10-27 00:12:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2363 states. [2020-10-27 00:12:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 3082 transitions. [2020-10-27 00:12:18,643 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 3082 transitions. Word has length 141 [2020-10-27 00:12:18,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:18,644 INFO L481 AbstractCegarLoop]: Abstraction has 2363 states and 3082 transitions. [2020-10-27 00:12:18,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:12:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 3082 transitions. [2020-10-27 00:12:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 00:12:18,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:18,653 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:12:18,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:12:18,654 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:18,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:18,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1176589850, now seen corresponding path program 1 times [2020-10-27 00:12:18,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:18,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98162927] [2020-10-27 00:12:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:18,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:19,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:19,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 00:12:19,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:19,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-27 00:12:19,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:19,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:19,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:12:19,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 00:12:19,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:19,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:19,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:19,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:19,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:19,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:19,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:12:19,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:19,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:12:19,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:19,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:12:19,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:19,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:19,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:19,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:19,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:19,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:19,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 00:12:19,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:12:19,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:12:19,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98162927] [2020-10-27 00:12:19,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:19,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:12:19,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347670637] [2020-10-27 00:12:19,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:12:19,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:19,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:12:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:12:19,455 INFO L87 Difference]: Start difference. First operand 2363 states and 3082 transitions. Second operand 5 states. [2020-10-27 00:12:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:33,642 INFO L93 Difference]: Finished difference Result 4728 states and 6541 transitions. [2020-10-27 00:12:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:12:33,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-27 00:12:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:33,665 INFO L225 Difference]: With dead ends: 4728 [2020-10-27 00:12:33,665 INFO L226 Difference]: Without dead ends: 2804 [2020-10-27 00:12:33,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:12:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2020-10-27 00:12:33,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2790. [2020-10-27 00:12:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2020-10-27 00:12:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3861 transitions. [2020-10-27 00:12:33,812 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3861 transitions. Word has length 154 [2020-10-27 00:12:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:33,814 INFO L481 AbstractCegarLoop]: Abstraction has 2790 states and 3861 transitions. [2020-10-27 00:12:33,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:12:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3861 transitions. [2020-10-27 00:12:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-27 00:12:33,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:33,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:12:33,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:12:33,820 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash -940352189, now seen corresponding path program 1 times [2020-10-27 00:12:33,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:33,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075357949] [2020-10-27 00:12:33,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:33,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:34,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:36,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:38,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:38,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 00:12:38,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:12:38,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 00:12:38,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:38,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:12:38,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:12:38,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:12:38,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:39,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:39,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:39,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:39,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:39,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:39,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:12:39,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:39,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:39,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:39,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:12:39,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:39,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:39,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:39,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:39,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:39,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:39,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-27 00:12:39,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:39,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:12:39,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:39,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:12:39,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:39,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:12:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:39,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:39,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:39,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:12:39,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 00:12:39,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:12:39,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 119 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 00:12:39,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075357949] [2020-10-27 00:12:39,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:39,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:12:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271502255] [2020-10-27 00:12:39,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:12:39,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:12:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:12:39,884 INFO L87 Difference]: Start difference. First operand 2790 states and 3861 transitions. Second operand 9 states. [2020-10-27 00:12:40,125 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 00:13:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:13:19,753 INFO L93 Difference]: Finished difference Result 7075 states and 10011 transitions. [2020-10-27 00:13:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 00:13:19,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 229 [2020-10-27 00:13:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:13:19,783 INFO L225 Difference]: With dead ends: 7075 [2020-10-27 00:13:19,783 INFO L226 Difference]: Without dead ends: 3826 [2020-10-27 00:13:19,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-27 00:13:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2020-10-27 00:13:19,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 3711. [2020-10-27 00:13:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3711 states. [2020-10-27 00:13:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3711 states to 3711 states and 4914 transitions. [2020-10-27 00:13:19,909 INFO L78 Accepts]: Start accepts. Automaton has 3711 states and 4914 transitions. Word has length 229 [2020-10-27 00:13:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:13:19,910 INFO L481 AbstractCegarLoop]: Abstraction has 3711 states and 4914 transitions. [2020-10-27 00:13:19,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:13:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3711 states and 4914 transitions. [2020-10-27 00:13:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 00:13:19,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:13:19,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:13:19,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:13:19,915 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:13:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:13:19,915 INFO L82 PathProgramCache]: Analyzing trace with hash -112811225, now seen corresponding path program 1 times [2020-10-27 00:13:19,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:13:19,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405098060] [2020-10-27 00:13:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:13:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:20,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:20,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:22,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:22,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:22,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 00:13:22,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:13:22,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2720 [2020-10-27 00:13:22,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:13:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:13:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-27 00:13:22,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:22,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:13:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:22,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:22,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:22,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:13:22,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:13:22,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:13:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:13:22,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:22,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:13:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:22,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:23,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:23,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:13:23,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:23,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-27 00:13:23,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:13:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:13:23,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:23,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:13:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:23,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:23,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:23,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:13:23,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:23,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 00:13:23,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:23,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:23,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:23,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:13:23,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:13:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 70 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:13:23,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405098060] [2020-10-27 00:13:23,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:13:23,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:13:23,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396131331] [2020-10-27 00:13:23,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:13:23,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:13:23,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:13:23,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:13:23,681 INFO L87 Difference]: Start difference. First operand 3711 states and 4914 transitions. Second operand 9 states. [2020-10-27 00:13:24,614 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-27 00:13:29,487 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:13:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:13:53,243 INFO L93 Difference]: Finished difference Result 9895 states and 13278 transitions. [2020-10-27 00:13:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 00:13:53,246 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 231 [2020-10-27 00:13:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:13:53,276 INFO L225 Difference]: With dead ends: 9895 [2020-10-27 00:13:53,276 INFO L226 Difference]: Without dead ends: 5727 [2020-10-27 00:13:53,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-27 00:13:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5727 states. [2020-10-27 00:13:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5727 to 5565. [2020-10-27 00:13:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5565 states. [2020-10-27 00:13:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5565 states to 5565 states and 7253 transitions. [2020-10-27 00:13:53,449 INFO L78 Accepts]: Start accepts. Automaton has 5565 states and 7253 transitions. Word has length 231 [2020-10-27 00:13:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:13:53,450 INFO L481 AbstractCegarLoop]: Abstraction has 5565 states and 7253 transitions. [2020-10-27 00:13:53,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:13:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states and 7253 transitions. [2020-10-27 00:13:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-27 00:13:53,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:13:53,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2020-10-27 00:13:53,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:13:53,455 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:13:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:13:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -231871731, now seen corresponding path program 1 times [2020-10-27 00:13:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:13:53,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108229043] [2020-10-27 00:13:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:13:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:53,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:53,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:53,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:58,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:58,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-27 00:13:58,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:13:58,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 00:13:58,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:13:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:13:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-27 00:13:58,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:58,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:13:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:58,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:58,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:58,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:13:58,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:58,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 00:13:58,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:58,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:13:58,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:58,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:13:58,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:58,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:13:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:58,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:58,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:58,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:13:58,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:58,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 00:13:58,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:13:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:13:58,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:58,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:13:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:58,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:59,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:59,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:59,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:13:59,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:13:59,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-27 00:13:59,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:13:59,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 140 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:13:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108229043] [2020-10-27 00:13:59,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:13:59,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:13:59,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652576704] [2020-10-27 00:13:59,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:13:59,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:13:59,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:13:59,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:13:59,463 INFO L87 Difference]: Start difference. First operand 5565 states and 7253 transitions. Second operand 6 states. [2020-10-27 00:14:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:14:19,909 INFO L93 Difference]: Finished difference Result 8590 states and 11564 transitions. [2020-10-27 00:14:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:14:19,912 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 240 [2020-10-27 00:14:19,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:14:19,941 INFO L225 Difference]: With dead ends: 8590 [2020-10-27 00:14:19,941 INFO L226 Difference]: Without dead ends: 5719 [2020-10-27 00:14:19,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:14:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5719 states. [2020-10-27 00:14:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5719 to 5135. [2020-10-27 00:14:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5135 states. [2020-10-27 00:14:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5135 states to 5135 states and 6429 transitions. [2020-10-27 00:14:20,101 INFO L78 Accepts]: Start accepts. Automaton has 5135 states and 6429 transitions. Word has length 240 [2020-10-27 00:14:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:14:20,101 INFO L481 AbstractCegarLoop]: Abstraction has 5135 states and 6429 transitions. [2020-10-27 00:14:20,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:14:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5135 states and 6429 transitions. [2020-10-27 00:14:20,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-27 00:14:20,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:20,108 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:14:20,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:14:20,108 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:20,109 INFO L82 PathProgramCache]: Analyzing trace with hash -863128280, now seen corresponding path program 1 times [2020-10-27 00:14:20,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:20,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190685690] [2020-10-27 00:14:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:20,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:20,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:20,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:20,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:23,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:25,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:25,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-27 00:14:25,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:14:25,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 00:14:25,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:25,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:14:25,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:25,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 318 [2020-10-27 00:14:25,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:25,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:25,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:25,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:25,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:25,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:25,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:14:25,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:25,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:25,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:25,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:25,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:25,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:14:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:25,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:25,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:25,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:14:25,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 00:14:25,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:14:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:25,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:14:25,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:25,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:14:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:25,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:25,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:14:25,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:25,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 00:14:25,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:25,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:14:25,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:25,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:14:25,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:25,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:14:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:26,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:26,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:26,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:14:26,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:26,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 00:14:26,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:26,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:14:26,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:26,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:14:26,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 9 proven. 302 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 00:14:26,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190685690] [2020-10-27 00:14:26,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:14:26,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:14:26,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472317157] [2020-10-27 00:14:26,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:14:26,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:26,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:14:26,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:14:26,258 INFO L87 Difference]: Start difference. First operand 5135 states and 6429 transitions. Second operand 9 states. [2020-10-27 00:14:27,257 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:14:55,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:14:55,075 INFO L93 Difference]: Finished difference Result 13782 states and 18328 transitions. [2020-10-27 00:14:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:14:55,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 311 [2020-10-27 00:14:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:14:55,117 INFO L225 Difference]: With dead ends: 13782 [2020-10-27 00:14:55,118 INFO L226 Difference]: Without dead ends: 8146 [2020-10-27 00:14:55,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:14:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8146 states. [2020-10-27 00:14:55,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8146 to 7853. [2020-10-27 00:14:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7853 states. [2020-10-27 00:14:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7853 states to 7853 states and 9844 transitions. [2020-10-27 00:14:55,363 INFO L78 Accepts]: Start accepts. Automaton has 7853 states and 9844 transitions. Word has length 311 [2020-10-27 00:14:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:14:55,364 INFO L481 AbstractCegarLoop]: Abstraction has 7853 states and 9844 transitions. [2020-10-27 00:14:55,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:14:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7853 states and 9844 transitions. [2020-10-27 00:14:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-27 00:14:55,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:55,372 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:14:55,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:14:55,372 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:55,373 INFO L82 PathProgramCache]: Analyzing trace with hash 539691284, now seen corresponding path program 1 times [2020-10-27 00:14:55,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:55,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474471275] [2020-10-27 00:14:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:55,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:55,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:55,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking...