/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/Problem15_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:39:46,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:39:46,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:39:46,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:39:46,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:39:47,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:39:47,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:39:47,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:39:47,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:39:47,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:39:47,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:39:47,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:39:47,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:39:47,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:39:47,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:39:47,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:39:47,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:39:47,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:39:47,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:39:47,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:39:47,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:39:47,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:39:47,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:39:47,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:39:47,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:39:47,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:39:47,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:39:47,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:39:47,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:39:47,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:39:47,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:39:47,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:39:47,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:39:47,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:39:47,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:39:47,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:39:47,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:39:47,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:39:47,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:39:47,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:39:47,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:39:47,096 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 [2020-10-26 23:39:47,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:39:47,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:39:47,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:39:47,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:39:47,160 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:39:47,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:39:47,161 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:39:47,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:39:47,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:39:47,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:39:47,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:39:47,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:39:47,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:39:47,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:39:47,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:39:47,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:39:47,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:39:47,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:39:47,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:39:47,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:39:47,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:39:47,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:39:47,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:39:47,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:39:47,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:39:47,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:39:47,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:39:47,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:39:47,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:39:47,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:39:47,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:39:47,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:39:47,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:39:47,665 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:39:47,666 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:39:47,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label21.c [2020-10-26 23:39:47,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5fade876/d0980b9c947245a9aa01d2cd238badfb/FLAGd2d3d6c2b [2020-10-26 23:39:48,700 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:39:48,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label21.c [2020-10-26 23:39:48,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5fade876/d0980b9c947245a9aa01d2cd238badfb/FLAGd2d3d6c2b [2020-10-26 23:39:48,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5fade876/d0980b9c947245a9aa01d2cd238badfb [2020-10-26 23:39:48,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:39:48,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:39:48,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:39:48,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:39:48,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:39:48,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:39:48" (1/1) ... [2020-10-26 23:39:48,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@308e85ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:48, skipping insertion in model container [2020-10-26 23:39:48,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:39:48" (1/1) ... [2020-10-26 23:39:48,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:39:48,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:39:49,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:39:49,998 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:39:50,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:39:50,428 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:39:50,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50 WrapperNode [2020-10-26 23:39:50,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:39:50,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:39:50,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:39:50,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:39:50,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50" (1/1) ... [2020-10-26 23:39:50,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50" (1/1) ... [2020-10-26 23:39:50,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50" (1/1) ... [2020-10-26 23:39:50,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50" (1/1) ... [2020-10-26 23:39:50,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50" (1/1) ... [2020-10-26 23:39:50,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50" (1/1) ... [2020-10-26 23:39:50,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50" (1/1) ... [2020-10-26 23:39:50,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:39:50,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:39:50,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:39:50,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:39:50,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50" (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 [2020-10-26 23:39:50,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:39:50,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:39:50,754 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:39:50,755 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:39:50,755 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:39:50,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:39:50,756 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:39:50,756 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:39:50,757 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:39:50,757 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:39:50,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:39:50,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:39:50,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:39:50,758 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:39:50,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:39:50,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:39:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:39:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:39:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:39:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:39:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:39:54,104 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:39:54,104 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:39:54,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:39:54 BoogieIcfgContainer [2020-10-26 23:39:54,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:39:54,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:39:54,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:39:54,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:39:54,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:39:48" (1/3) ... [2020-10-26 23:39:54,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba34f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:39:54, skipping insertion in model container [2020-10-26 23:39:54,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:50" (2/3) ... [2020-10-26 23:39:54,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba34f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:39:54, skipping insertion in model container [2020-10-26 23:39:54,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:39:54" (3/3) ... [2020-10-26 23:39:54,118 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label21.c [2020-10-26 23:39:54,134 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:39:54,141 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:39:54,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:39:54,195 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:39:54,195 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:39:54,195 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:39:54,195 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:39:54,196 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:39:54,196 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:39:54,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:39:54,196 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:39:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:39:54,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 23:39:54,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:54,240 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] [2020-10-26 23:39:54,241 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1868936201, now seen corresponding path program 1 times [2020-10-26 23:39:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:54,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875657730] [2020-10-26 23:39:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:54,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:55,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:55,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:39:55,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:55,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-26 23:39:55,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:55,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:39:55,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:39:55,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 23:39:55,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:39:55,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:55,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:55,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:55,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:55,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:55,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 23:39:55,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:39:55,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:39:55,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875657730] [2020-10-26 23:39:55,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:39:55,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:39:55,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095397304] [2020-10-26 23:39:55,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:39:55,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:39:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:39:55,453 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:40:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:01,016 INFO L93 Difference]: Finished difference Result 1229 states and 2206 transitions. [2020-10-26 23:40:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:40:01,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-26 23:40:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:01,042 INFO L225 Difference]: With dead ends: 1229 [2020-10-26 23:40:01,043 INFO L226 Difference]: Without dead ends: 709 [2020-10-26 23:40:01,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:40:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-26 23:40:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 695. [2020-10-26 23:40:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-26 23:40:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1081 transitions. [2020-10-26 23:40:01,251 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1081 transitions. Word has length 67 [2020-10-26 23:40:01,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:01,253 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1081 transitions. [2020-10-26 23:40:01,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:40:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1081 transitions. [2020-10-26 23:40:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 23:40:01,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:01,271 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] [2020-10-26 23:40:01,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:40:01,271 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash -288530017, now seen corresponding path program 1 times [2020-10-26 23:40:01,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:01,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813186131] [2020-10-26 23:40:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:01,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:01,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:03,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:03,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:03,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 23:40:03,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:40:03,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2365 [2020-10-26 23:40:03,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:03,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:03,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:03,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:40:03,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:03,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:03,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:03,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:03,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:03,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:03,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:40:03,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:03,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:03,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:03,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:03,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:40:03,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:03,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:04,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:04,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:40:04,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:04,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 23:40:04,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:04,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:04,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:04,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:40:04,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:04,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813186131] [2020-10-26 23:40:04,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:04,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:40:04,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437217010] [2020-10-26 23:40:04,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:04,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:04,256 INFO L87 Difference]: Start difference. First operand 695 states and 1081 transitions. Second operand 7 states. [2020-10-26 23:40:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:11,020 INFO L93 Difference]: Finished difference Result 1723 states and 2746 transitions. [2020-10-26 23:40:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:40:11,021 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 137 [2020-10-26 23:40:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:11,035 INFO L225 Difference]: With dead ends: 1723 [2020-10-26 23:40:11,037 INFO L226 Difference]: Without dead ends: 1034 [2020-10-26 23:40:11,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:40:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2020-10-26 23:40:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1005. [2020-10-26 23:40:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2020-10-26 23:40:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1356 transitions. [2020-10-26 23:40:11,092 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1356 transitions. Word has length 137 [2020-10-26 23:40:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:11,095 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1356 transitions. [2020-10-26 23:40:11,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1356 transitions. [2020-10-26 23:40:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-26 23:40:11,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:11,105 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] [2020-10-26 23:40:11,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:40:11,106 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash -941988633, now seen corresponding path program 1 times [2020-10-26 23:40:11,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:11,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551422018] [2020-10-26 23:40:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:11,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:11,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:12,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:12,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:12,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-26 23:40:12,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:40:12,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-10-26 23:40:12,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:40:12,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:12,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:12,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:12,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:12,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:12,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:40:12,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:12,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:12,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:12,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:12,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:12,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:12,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:13,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:13,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 23:40:13,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:13,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 23:40:13,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:13,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:13,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:13,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:40:13,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:13,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551422018] [2020-10-26 23:40:13,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:13,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:40:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151367230] [2020-10-26 23:40:13,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:13,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:13,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:13,130 INFO L87 Difference]: Start difference. First operand 1005 states and 1356 transitions. Second operand 7 states. [2020-10-26 23:40:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:23,184 INFO L93 Difference]: Finished difference Result 2389 states and 3378 transitions. [2020-10-26 23:40:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:40:23,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2020-10-26 23:40:23,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:23,201 INFO L225 Difference]: With dead ends: 2389 [2020-10-26 23:40:23,201 INFO L226 Difference]: Without dead ends: 1697 [2020-10-26 23:40:23,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:40:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2020-10-26 23:40:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1657. [2020-10-26 23:40:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2020-10-26 23:40:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2066 transitions. [2020-10-26 23:40:23,265 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2066 transitions. Word has length 141 [2020-10-26 23:40:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:23,266 INFO L481 AbstractCegarLoop]: Abstraction has 1657 states and 2066 transitions. [2020-10-26 23:40:23,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2066 transitions. [2020-10-26 23:40:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 23:40:23,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:23,268 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:23,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:40:23,269 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1301947549, now seen corresponding path program 1 times [2020-10-26 23:40:23,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:23,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796434563] [2020-10-26 23:40:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:23,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:23,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:23,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:23,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-26 23:40:23,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:23,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-26 23:40:23,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:23,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:23,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:40:23,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 23:40:23,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:23,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:23,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:23,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:23,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:23,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:23,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 23:40:23,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:23,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:24,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:24,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:24,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:24,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:40:24,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:24,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 23:40:24,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:24,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:40:24,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:24,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796434563] [2020-10-26 23:40:24,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:24,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:40:24,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872657708] [2020-10-26 23:40:24,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:40:24,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:24,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:40:24,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:40:24,286 INFO L87 Difference]: Start difference. First operand 1657 states and 2066 transitions. Second operand 5 states. [2020-10-26 23:40:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:29,553 INFO L93 Difference]: Finished difference Result 3093 states and 3909 transitions. [2020-10-26 23:40:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:40:29,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-26 23:40:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:29,572 INFO L225 Difference]: With dead ends: 3093 [2020-10-26 23:40:29,572 INFO L226 Difference]: Without dead ends: 1664 [2020-10-26 23:40:29,577 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 [2020-10-26 23:40:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2020-10-26 23:40:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1657. [2020-10-26 23:40:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2020-10-26 23:40:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2052 transitions. [2020-10-26 23:40:29,632 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2052 transitions. Word has length 162 [2020-10-26 23:40:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:29,632 INFO L481 AbstractCegarLoop]: Abstraction has 1657 states and 2052 transitions. [2020-10-26 23:40:29,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:40:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2052 transitions. [2020-10-26 23:40:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-26 23:40:29,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:29,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:29,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:40:29,637 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash -197760817, now seen corresponding path program 1 times [2020-10-26 23:40:29,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:29,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749867396] [2020-10-26 23:40:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:29,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:29,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:30,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:32,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:32,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-26 23:40:32,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:40:32,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2930 [2020-10-26 23:40:32,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-26 23:40:32,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:32,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:32,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:32,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:32,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:32,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:32,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 23:40:32,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:32,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:32,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:32,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:32,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:32,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:33,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:33,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:33,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 23:40:33,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:33,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-26 23:40:33,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-26 23:40:33,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:33,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749867396] [2020-10-26 23:40:33,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:33,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:40:33,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209497103] [2020-10-26 23:40:33,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:33,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:33,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:33,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:33,849 INFO L87 Difference]: Start difference. First operand 1657 states and 2052 transitions. Second operand 7 states. [2020-10-26 23:40:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:41,953 INFO L93 Difference]: Finished difference Result 3055 states and 3842 transitions. [2020-10-26 23:40:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:40:41,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 229 [2020-10-26 23:40:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:41,965 INFO L225 Difference]: With dead ends: 3055 [2020-10-26 23:40:41,965 INFO L226 Difference]: Without dead ends: 1711 [2020-10-26 23:40:41,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:40:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2020-10-26 23:40:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1661. [2020-10-26 23:40:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2020-10-26 23:40:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2052 transitions. [2020-10-26 23:40:42,024 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2052 transitions. Word has length 229 [2020-10-26 23:40:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:42,025 INFO L481 AbstractCegarLoop]: Abstraction has 1661 states and 2052 transitions. [2020-10-26 23:40:42,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2052 transitions. [2020-10-26 23:40:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-26 23:40:42,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:42,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:42,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:40:42,029 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash 173726003, now seen corresponding path program 1 times [2020-10-26 23:40:42,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:42,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819844349] [2020-10-26 23:40:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:42,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:42,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:42,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:42,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-26 23:40:42,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:42,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-26 23:40:42,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:42,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:42,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-26 23:40:42,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 23:40:42,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:43,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:43,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:43,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:43,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:43,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:43,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:40:43,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:43,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:43,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:43,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:43,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:43,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-26 23:40:43,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:43,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-26 23:40:43,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:43,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-26 23:40:43,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:43,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819844349] [2020-10-26 23:40:43,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:43,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:40:43,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141149284] [2020-10-26 23:40:43,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:40:43,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:40:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:40:43,610 INFO L87 Difference]: Start difference. First operand 1661 states and 2052 transitions. Second operand 5 states. [2020-10-26 23:40:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:52,459 INFO L93 Difference]: Finished difference Result 3096 states and 3885 transitions. [2020-10-26 23:40:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:40:52,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2020-10-26 23:40:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:52,475 INFO L225 Difference]: With dead ends: 3096 [2020-10-26 23:40:52,475 INFO L226 Difference]: Without dead ends: 1668 [2020-10-26 23:40:52,480 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 [2020-10-26 23:40:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2020-10-26 23:40:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1661. [2020-10-26 23:40:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2020-10-26 23:40:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2035 transitions. [2020-10-26 23:40:52,535 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2035 transitions. Word has length 247 [2020-10-26 23:40:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:52,535 INFO L481 AbstractCegarLoop]: Abstraction has 1661 states and 2035 transitions. [2020-10-26 23:40:52,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:40:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2035 transitions. [2020-10-26 23:40:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-26 23:40:52,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:52,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:52,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:40:52,542 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1758480, now seen corresponding path program 1 times [2020-10-26 23:40:52,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:52,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768840207] [2020-10-26 23:40:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:52,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:53,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:53,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:55,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:55,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-26 23:40:55,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:40:55,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2668 [2020-10-26 23:40:55,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:55,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 23:40:55,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:55,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 282 [2020-10-26 23:40:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:55,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:55,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:55,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:55,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:55,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:55,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:40:55,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:55,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:55,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:55,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:56,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:56,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-26 23:40:56,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:56,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-26 23:40:56,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:40:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-26 23:40:56,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:56,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768840207] [2020-10-26 23:40:56,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:56,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:40:56,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897004089] [2020-10-26 23:40:56,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:40:56,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:40:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:40:56,669 INFO L87 Difference]: Start difference. First operand 1661 states and 2035 transitions. Second operand 8 states. [2020-10-26 23:41:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:09,144 INFO L93 Difference]: Finished difference Result 3407 states and 4217 transitions. [2020-10-26 23:41:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:41:09,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 304 [2020-10-26 23:41:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:09,157 INFO L225 Difference]: With dead ends: 3407 [2020-10-26 23:41:09,158 INFO L226 Difference]: Without dead ends: 2022 [2020-10-26 23:41:09,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:41:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2020-10-26 23:41:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1972. [2020-10-26 23:41:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1972 states. [2020-10-26 23:41:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 2397 transitions. [2020-10-26 23:41:09,228 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 2397 transitions. Word has length 304 [2020-10-26 23:41:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:09,229 INFO L481 AbstractCegarLoop]: Abstraction has 1972 states and 2397 transitions. [2020-10-26 23:41:09,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:41:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 2397 transitions. [2020-10-26 23:41:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-10-26 23:41:09,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:09,238 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:09,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:41:09,239 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1810570515, now seen corresponding path program 1 times [2020-10-26 23:41:09,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:09,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140672607] [2020-10-26 23:41:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:09,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:10,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:10,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:14,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:14,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 424 [2020-10-26 23:41:14,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:41:14,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4819 [2020-10-26 23:41:14,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:14,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:14,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:41:14,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 23:41:14,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:14,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:14,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:14,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:14,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:14,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:14,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 23:41:14,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:14,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:14,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:14,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:14,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:14,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:14,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:14,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:14,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:41:14,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:14,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-26 23:41:14,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:14,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:41:14,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:14,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:41:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:15,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:15,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:15,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:41:15,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:15,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 23:41:15,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:15,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:15,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:15,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:41:15,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:41:15,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140672607] [2020-10-26 23:41:15,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:15,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:41:15,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149854819] [2020-10-26 23:41:15,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:41:15,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:15,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:41:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:41:15,536 INFO L87 Difference]: Start difference. First operand 1972 states and 2397 transitions. Second operand 7 states. [2020-10-26 23:41:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:29,555 INFO L93 Difference]: Finished difference Result 4632 states and 5863 transitions. [2020-10-26 23:41:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:41:29,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 410 [2020-10-26 23:41:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:29,574 INFO L225 Difference]: With dead ends: 4632 [2020-10-26 23:41:29,574 INFO L226 Difference]: Without dead ends: 2973 [2020-10-26 23:41:29,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:41:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2020-10-26 23:41:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2923. [2020-10-26 23:41:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2923 states. [2020-10-26 23:41:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 3403 transitions. [2020-10-26 23:41:29,667 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 3403 transitions. Word has length 410 [2020-10-26 23:41:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:29,668 INFO L481 AbstractCegarLoop]: Abstraction has 2923 states and 3403 transitions. [2020-10-26 23:41:29,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:41:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 3403 transitions. [2020-10-26 23:41:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-10-26 23:41:29,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:29,677 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:29,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:41:29,678 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1061743115, now seen corresponding path program 1 times [2020-10-26 23:41:29,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:29,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602463723] [2020-10-26 23:41:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:30,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:31,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:34,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:34,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 436 [2020-10-26 23:41:34,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:41:34,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 23:41:34,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:34,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:41:34,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:41:34,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:41:34,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:35,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:35,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:35,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:35,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:35,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:35,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:41:35,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:35,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:35,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:35,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:35,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:35,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:35,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:41:35,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:35,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-26 23:41:35,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:35,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:41:35,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:35,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:41:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:35,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:35,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:35,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:41:35,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 23:41:35,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:41:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:41:35,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 152 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:41:36,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602463723] [2020-10-26 23:41:36,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:36,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:41:36,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182257945] [2020-10-26 23:41:36,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:41:36,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:41:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:41:36,257 INFO L87 Difference]: Start difference. First operand 2923 states and 3403 transitions. Second operand 8 states. [2020-10-26 23:41:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:51,949 INFO L93 Difference]: Finished difference Result 6685 states and 8146 transitions. [2020-10-26 23:41:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:41:51,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 422 [2020-10-26 23:41:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:51,971 INFO L225 Difference]: With dead ends: 6685 [2020-10-26 23:41:51,971 INFO L226 Difference]: Without dead ends: 4593 [2020-10-26 23:41:51,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:41:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2020-10-26 23:41:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 4520. [2020-10-26 23:41:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4520 states. [2020-10-26 23:41:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 5345 transitions. [2020-10-26 23:41:52,117 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 5345 transitions. Word has length 422 [2020-10-26 23:41:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:52,120 INFO L481 AbstractCegarLoop]: Abstraction has 4520 states and 5345 transitions. [2020-10-26 23:41:52,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:41:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 5345 transitions. [2020-10-26 23:41:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-10-26 23:41:52,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:52,131 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:52,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:41:52,131 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:52,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2073055841, now seen corresponding path program 1 times [2020-10-26 23:41:52,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:52,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785150852] [2020-10-26 23:41:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:52,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:55,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:55,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 447 [2020-10-26 23:41:55,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:55,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2855 [2020-10-26 23:41:55,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:55,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:55,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:41:55,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:41:55,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:55,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:55,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:55,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:55,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:55,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:55,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:41:55,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:55,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:55,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:55,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:55,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:55,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:55,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:55,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:55,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:41:55,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:55,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-26 23:41:55,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:55,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:41:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:55,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:41:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:55,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:55,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:55,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:41:55,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:55,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 23:41:55,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:41:55,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:41:56,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785150852] [2020-10-26 23:41:56,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:56,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:41:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023718607] [2020-10-26 23:41:56,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:41:56,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:41:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:41:56,053 INFO L87 Difference]: Start difference. First operand 4520 states and 5345 transitions. Second operand 7 states. [2020-10-26 23:42:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:08,554 INFO L93 Difference]: Finished difference Result 10400 states and 12833 transitions. [2020-10-26 23:42:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:42:08,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 433 [2020-10-26 23:42:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:08,588 INFO L225 Difference]: With dead ends: 10400 [2020-10-26 23:42:08,589 INFO L226 Difference]: Without dead ends: 6193 [2020-10-26 23:42:08,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:42:08,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6193 states. [2020-10-26 23:42:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6193 to 6125. [2020-10-26 23:42:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6125 states. [2020-10-26 23:42:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6125 states to 6125 states and 7300 transitions. [2020-10-26 23:42:08,766 INFO L78 Accepts]: Start accepts. Automaton has 6125 states and 7300 transitions. Word has length 433 [2020-10-26 23:42:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:08,766 INFO L481 AbstractCegarLoop]: Abstraction has 6125 states and 7300 transitions. [2020-10-26 23:42:08,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:42:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 6125 states and 7300 transitions. [2020-10-26 23:42:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-10-26 23:42:08,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:08,771 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:42:08,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:42:08,772 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:08,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2102419230, now seen corresponding path program 1 times [2020-10-26 23:42:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:08,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763963663] [2020-10-26 23:42:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:08,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:09,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:09,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 478 [2020-10-26 23:42:09,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:09,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-26 23:42:09,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:42:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 23:42:09,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:09,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:09,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:09,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:09,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:09,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:09,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:42:09,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:09,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:09,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:09,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:09,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:09,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:09,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:10,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:10,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:42:10,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:10,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 23:42:10,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:10,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:10,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:10,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:10,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:10,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:42:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:10,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:10,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:10,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:42:10,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-26 23:42:10,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:42:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 23:42:10,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763963663] [2020-10-26 23:42:10,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:10,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:42:10,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477313353] [2020-10-26 23:42:10,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:42:10,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:42:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:42:10,542 INFO L87 Difference]: Start difference. First operand 6125 states and 7300 transitions. Second operand 5 states. [2020-10-26 23:42:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:19,308 INFO L93 Difference]: Finished difference Result 11943 states and 14307 transitions. [2020-10-26 23:42:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:42:19,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 464 [2020-10-26 23:42:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:19,342 INFO L225 Difference]: With dead ends: 11943 [2020-10-26 23:42:19,342 INFO L226 Difference]: Without dead ends: 6131 [2020-10-26 23:42:19,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:42:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2020-10-26 23:42:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 6128. [2020-10-26 23:42:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6128 states. [2020-10-26 23:42:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6128 states to 6128 states and 7051 transitions. [2020-10-26 23:42:19,515 INFO L78 Accepts]: Start accepts. Automaton has 6128 states and 7051 transitions. Word has length 464 [2020-10-26 23:42:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:19,517 INFO L481 AbstractCegarLoop]: Abstraction has 6128 states and 7051 transitions. [2020-10-26 23:42:19,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:42:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 6128 states and 7051 transitions. [2020-10-26 23:42:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-26 23:42:19,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:19,527 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:42:19,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:42:19,527 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1467100404, now seen corresponding path program 1 times [2020-10-26 23:42:19,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:19,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68699215] [2020-10-26 23:42:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:19,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:20,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:24,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:24,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 514 [2020-10-26 23:42:24,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:42:24,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4620 [2020-10-26 23:42:24,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 23:42:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:42:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 480 [2020-10-26 23:42:24,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:24,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:24,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:24,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:24,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:24,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:24,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:42:24,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:24,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:24,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:24,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:42:24,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:24,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:24,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:25,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:25,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:42:25,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:25,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-26 23:42:25,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:25,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:25,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:25,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 287 [2020-10-26 23:42:25,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:25,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:42:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:25,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:25,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:25,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 23:42:25,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:25,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-26 23:42:25,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:25,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:42:25,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:25,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 23:42:25,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 57 proven. 64 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-26 23:42:26,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68699215] [2020-10-26 23:42:26,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:26,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:42:26,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739713279] [2020-10-26 23:42:26,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:42:26,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:26,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:42:26,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:42:26,160 INFO L87 Difference]: Start difference. First operand 6128 states and 7051 transitions. Second operand 8 states. [2020-10-26 23:42:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:42,720 INFO L93 Difference]: Finished difference Result 14360 states and 17312 transitions. [2020-10-26 23:42:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:42:42,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 500 [2020-10-26 23:42:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:42,763 INFO L225 Difference]: With dead ends: 14360 [2020-10-26 23:42:42,764 INFO L226 Difference]: Without dead ends: 9688 [2020-10-26 23:42:42,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:42:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9688 states. [2020-10-26 23:42:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9688 to 9278. [2020-10-26 23:42:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9278 states. [2020-10-26 23:42:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9278 states to 9278 states and 10798 transitions. [2020-10-26 23:42:43,050 INFO L78 Accepts]: Start accepts. Automaton has 9278 states and 10798 transitions. Word has length 500 [2020-10-26 23:42:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:43,051 INFO L481 AbstractCegarLoop]: Abstraction has 9278 states and 10798 transitions. [2020-10-26 23:42:43,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:42:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 9278 states and 10798 transitions. [2020-10-26 23:42:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2020-10-26 23:42:43,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:43,059 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:42:43,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:42:43,059 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:43,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1782631290, now seen corresponding path program 1 times [2020-10-26 23:42:43,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:43,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109859836] [2020-10-26 23:42:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:43,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:44,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:45,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:48,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:48,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 549 [2020-10-26 23:42:48,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:42:48,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-26 23:42:48,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:42:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 23:42:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:48,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:48,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:48,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:48,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:42:48,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:48,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:48,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:48,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:48,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:48,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:42:48,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:48,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-26 23:42:48,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:48,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:48,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:48,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:48,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:48,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:42:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:49,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:49,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:49,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:42:49,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 23:42:49,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:42:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:49,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:42:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:49,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:49,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:49,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:42:49,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:49,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 23:42:49,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:49,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:49,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:49,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:42:49,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 314 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:42:49,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109859836] [2020-10-26 23:42:49,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:49,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:42:49,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637107649] [2020-10-26 23:42:49,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:42:49,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:49,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:42:49,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:42:49,830 INFO L87 Difference]: Start difference. First operand 9278 states and 10798 transitions. Second operand 7 states. [2020-10-26 23:42:53,234 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:43:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:04,347 INFO L93 Difference]: Finished difference Result 20849 states and 24822 transitions. [2020-10-26 23:43:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:43:04,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 533 [2020-10-26 23:43:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:04,404 INFO L225 Difference]: With dead ends: 20849 [2020-10-26 23:43:04,404 INFO L226 Difference]: Without dead ends: 13129 [2020-10-26 23:43:04,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:43:04,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13129 states. [2020-10-26 23:43:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13129 to 11557. [2020-10-26 23:43:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11557 states. [2020-10-26 23:43:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11557 states to 11557 states and 13809 transitions. [2020-10-26 23:43:04,927 INFO L78 Accepts]: Start accepts. Automaton has 11557 states and 13809 transitions. Word has length 533 [2020-10-26 23:43:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:04,928 INFO L481 AbstractCegarLoop]: Abstraction has 11557 states and 13809 transitions. [2020-10-26 23:43:04,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:43:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 11557 states and 13809 transitions. [2020-10-26 23:43:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2020-10-26 23:43:04,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:04,935 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:43:04,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 23:43:04,936 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:04,937 INFO L82 PathProgramCache]: Analyzing trace with hash 503554473, now seen corresponding path program 1 times [2020-10-26 23:43:04,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:04,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155364682] [2020-10-26 23:43:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:05,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:05,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 553 [2020-10-26 23:43:07,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:43:07,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2225 [2020-10-26 23:43:07,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:07,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:43:07,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:43:07,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:43:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:43:07,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:43:07,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:07,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:43:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:43:07,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 23:43:07,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:07,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:07,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:07,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:43:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:43:07,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 23:43:07,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:43:07,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:07,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:43:07,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:43:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:08,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:08,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 23:43:08,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:43:08,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155364682] [2020-10-26 23:43:08,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:43:08,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:43:08,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184628128] [2020-10-26 23:43:08,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:43:08,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:43:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:43:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:43:08,188 INFO L87 Difference]: Start difference. First operand 11557 states and 13809 transitions. Second operand 7 states. [2020-10-26 23:43:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:23,306 INFO L93 Difference]: Finished difference Result 27367 states and 33914 transitions. [2020-10-26 23:43:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:43:23,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 537 [2020-10-26 23:43:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:23,376 INFO L225 Difference]: With dead ends: 27367 [2020-10-26 23:43:23,376 INFO L226 Difference]: Without dead ends: 16709 [2020-10-26 23:43:23,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:43:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16709 states. [2020-10-26 23:43:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16709 to 15398. [2020-10-26 23:43:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2020-10-26 23:43:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 18127 transitions. [2020-10-26 23:43:23,828 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 18127 transitions. Word has length 537 [2020-10-26 23:43:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:23,830 INFO L481 AbstractCegarLoop]: Abstraction has 15398 states and 18127 transitions. [2020-10-26 23:43:23,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:43:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 18127 transitions. [2020-10-26 23:43:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2020-10-26 23:43:23,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:23,837 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:43:23,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 23:43:23,838 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:23,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1757893398, now seen corresponding path program 1 times [2020-10-26 23:43:23,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:23,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087923556] [2020-10-26 23:43:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking...