/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/Problem05_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:16:55,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:16:55,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:16:56,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:16:56,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:16:56,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:16:56,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:16:56,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:16:56,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:16:56,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:16:56,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:16:56,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:16:56,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:16:56,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:16:56,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:16:56,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:16:56,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:16:56,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:16:56,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:16:56,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:16:56,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:16:56,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:16:56,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:16:56,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:16:56,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:16:56,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:16:56,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:16:56,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:16:56,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:16:56,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:16:56,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:16:56,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:16:56,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:16:56,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:16:56,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:16:56,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:16:56,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:16:56,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:16:56,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:16:56,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:16:56,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:16:56,083 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 21:16:56,147 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:16:56,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:16:56,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:16:56,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:16:56,153 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:16:56,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:16:56,154 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:16:56,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:16:56,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:16:56,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:16:56,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:16:56,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:16:56,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:16:56,157 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:16:56,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:16:56,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:16:56,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:16:56,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:16:56,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:16:56,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:16:56,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:16:56,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:16:56,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:16:56,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:16:56,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:16:56,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:16:56,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:16:56,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:16:56,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:16:56,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:16:56,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:16:56,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:16:56,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:16:56,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:16:56,588 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:16:56,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label24.c [2020-10-26 21:16:56,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64895dd43/5b6c0dce38fe424688e8ee9de6e758e2/FLAGed6a907db [2020-10-26 21:16:58,080 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:16:58,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label24.c [2020-10-26 21:16:58,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64895dd43/5b6c0dce38fe424688e8ee9de6e758e2/FLAGed6a907db [2020-10-26 21:16:58,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64895dd43/5b6c0dce38fe424688e8ee9de6e758e2 [2020-10-26 21:16:58,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:16:58,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:16:58,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:16:58,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:16:58,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:16:58,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:16:58" (1/1) ... [2020-10-26 21:16:58,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c27db08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:16:58, skipping insertion in model container [2020-10-26 21:16:58,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:16:58" (1/1) ... [2020-10-26 21:16:58,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:16:58,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:17:00,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:17:00,957 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:17:02,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:17:02,234 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:17:02,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02 WrapperNode [2020-10-26 21:17:02,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:17:02,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:17:02,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:17:02,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:17:02,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02" (1/1) ... [2020-10-26 21:17:02,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02" (1/1) ... [2020-10-26 21:17:02,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02" (1/1) ... [2020-10-26 21:17:02,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02" (1/1) ... [2020-10-26 21:17:02,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02" (1/1) ... [2020-10-26 21:17:02,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02" (1/1) ... [2020-10-26 21:17:02,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02" (1/1) ... [2020-10-26 21:17:02,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:17:02,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:17:02,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:17:02,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:17:02,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02" (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 21:17:03,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:17:03,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:17:03,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:17:03,076 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:17:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:17:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:17:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:17:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:17:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-26 21:17:03,078 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-26 21:17:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-26 21:17:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:17:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:17:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:17:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:17:03,080 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:17:03,080 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:17:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-26 21:17:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-26 21:17:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-26 21:17:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:17:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:17:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:17:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:17:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:17:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:17:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:17:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:17:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:17:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:17:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:17:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:17:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:17:13,480 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:17:13,481 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:17:13,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:17:13 BoogieIcfgContainer [2020-10-26 21:17:13,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:17:13,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:17:13,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:17:13,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:17:13,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:16:58" (1/3) ... [2020-10-26 21:17:13,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34acf688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:17:13, skipping insertion in model container [2020-10-26 21:17:13,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:02" (2/3) ... [2020-10-26 21:17:13,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34acf688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:17:13, skipping insertion in model container [2020-10-26 21:17:13,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:17:13" (3/3) ... [2020-10-26 21:17:13,496 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label24.c [2020-10-26 21:17:13,509 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:17:13,516 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:17:13,530 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:17:13,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:17:13,569 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:17:13,569 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:17:13,569 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:17:13,569 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:17:13,569 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:17:13,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:17:13,570 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:17:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-26 21:17:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1678 [2020-10-26 21:17:13,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:17:13,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:13,767 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:17:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:17:13,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1134520087, now seen corresponding path program 1 times [2020-10-26 21:17:13,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:17:13,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596211263] [2020-10-26 21:17:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:17:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:17:15,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:17:20,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:17:20,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1701 [2020-10-26 21:17:20,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:17:20,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-26 21:17:20,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:17:20,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 21:17:20,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:17:20,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1692 [2020-10-26 21:17:20,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:17:22,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:17:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:17:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:17:22,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:17:22,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:17:22,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:17:22,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 21:17:22,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:17:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:17:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:17:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:17:22,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:17:25,198 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 21:17:25,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596211263] [2020-10-26 21:17:25,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:17:25,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 21:17:25,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387744559] [2020-10-26 21:17:25,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 21:17:25,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:17:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 21:17:25,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 21:17:25,227 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-26 21:17:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:17:46,756 INFO L93 Difference]: Finished difference Result 6365 states and 11967 transitions. [2020-10-26 21:17:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 21:17:46,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1677 [2020-10-26 21:17:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:17:46,812 INFO L225 Difference]: With dead ends: 6365 [2020-10-26 21:17:46,813 INFO L226 Difference]: Without dead ends: 4075 [2020-10-26 21:17:46,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 21:17:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-10-26 21:17:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4005. [2020-10-26 21:17:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4005 states. [2020-10-26 21:17:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 6505 transitions. [2020-10-26 21:17:47,048 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 6505 transitions. Word has length 1677 [2020-10-26 21:17:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:17:47,053 INFO L481 AbstractCegarLoop]: Abstraction has 4005 states and 6505 transitions. [2020-10-26 21:17:47,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 21:17:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 6505 transitions. [2020-10-26 21:17:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2020-10-26 21:17:47,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:17:47,321 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:47,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:17:47,322 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:17:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:17:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash 177690353, now seen corresponding path program 1 times [2020-10-26 21:17:47,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:17:47,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214117092] [2020-10-26 21:17:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:17:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:17:48,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:17:49,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:17:53,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:17:53,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1714 [2020-10-26 21:17:53,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:17:53,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5313 [2020-10-26 21:17:53,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:17:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:17:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:17:53,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 21:17:53,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:17:54,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:17:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:17:54,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:17:54,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:17:54,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:17:54,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:17:54,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 21:17:54,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:17:54,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:17:54,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:17:54,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:17:54,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:17:54,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:17:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:17:54,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:17:54,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:17:54,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 21:17:54,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:17:54,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 21:17:54,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:17:54,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:17:54,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:17:54,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 21:17:54,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:17:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:17:56,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214117092] [2020-10-26 21:17:56,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:17:56,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:17:56,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486825092] [2020-10-26 21:17:56,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:17:56,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:17:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:17:56,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:17:56,082 INFO L87 Difference]: Start difference. First operand 4005 states and 6505 transitions. Second operand 7 states. [2020-10-26 21:18:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:18:23,025 INFO L93 Difference]: Finished difference Result 11842 states and 19356 transitions. [2020-10-26 21:18:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:18:23,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1688 [2020-10-26 21:18:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:18:23,089 INFO L225 Difference]: With dead ends: 11842 [2020-10-26 21:18:23,090 INFO L226 Difference]: Without dead ends: 7843 [2020-10-26 21:18:23,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 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 21:18:23,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7843 states. [2020-10-26 21:18:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7843 to 7669. [2020-10-26 21:18:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7669 states. [2020-10-26 21:18:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7669 states to 7669 states and 10662 transitions. [2020-10-26 21:18:23,386 INFO L78 Accepts]: Start accepts. Automaton has 7669 states and 10662 transitions. Word has length 1688 [2020-10-26 21:18:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:18:23,387 INFO L481 AbstractCegarLoop]: Abstraction has 7669 states and 10662 transitions. [2020-10-26 21:18:23,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:18:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 7669 states and 10662 transitions. [2020-10-26 21:18:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1700 [2020-10-26 21:18:23,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:18:23,514 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:23,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:18:23,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:18:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:18:23,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1475104776, now seen corresponding path program 1 times [2020-10-26 21:18:23,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:18:23,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505779793] [2020-10-26 21:18:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:18:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:18:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:18:24,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:18:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:18:29,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:18:29,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1725 [2020-10-26 21:18:29,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:18:29,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5226 [2020-10-26 21:18:29,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:18:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:18:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:18:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 21:18:29,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:18:29,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:18:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:18:29,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:18:29,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:18:29,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:18:29,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:18:29,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:18:29,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:18:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:18:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:18:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:18:29,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:18:29,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:18:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:18:29,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:18:29,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:18:29,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 21:18:29,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:18:29,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 21:18:29,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:18:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:18:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:18:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 21:18:29,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:18:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:18:31,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505779793] [2020-10-26 21:18:31,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:18:31,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:18:31,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382011912] [2020-10-26 21:18:31,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:18:31,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:18:31,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:18:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:18:31,201 INFO L87 Difference]: Start difference. First operand 7669 states and 10662 transitions. Second operand 7 states. [2020-10-26 21:18:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:18:57,021 INFO L93 Difference]: Finished difference Result 19701 states and 27525 transitions. [2020-10-26 21:18:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 21:18:57,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1699 [2020-10-26 21:18:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:18:57,086 INFO L225 Difference]: With dead ends: 19701 [2020-10-26 21:18:57,086 INFO L226 Difference]: Without dead ends: 12038 [2020-10-26 21:18:57,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 21:18:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12038 states. [2020-10-26 21:18:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12038 to 11581. [2020-10-26 21:18:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11581 states. [2020-10-26 21:18:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11581 states to 11581 states and 15018 transitions. [2020-10-26 21:18:57,559 INFO L78 Accepts]: Start accepts. Automaton has 11581 states and 15018 transitions. Word has length 1699 [2020-10-26 21:18:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:18:57,562 INFO L481 AbstractCegarLoop]: Abstraction has 11581 states and 15018 transitions. [2020-10-26 21:18:57,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:18:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 11581 states and 15018 transitions. [2020-10-26 21:18:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1732 [2020-10-26 21:18:57,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:18:57,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:57,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:18:57,627 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:18:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:18:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1934478506, now seen corresponding path program 1 times [2020-10-26 21:18:57,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:18:57,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792503028] [2020-10-26 21:18:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:18:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:18:57,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:18:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:19:02,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:19:02,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1757 [2020-10-26 21:19:02,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:19:02,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-26 21:19:02,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:19:02,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:19:02,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:19:02,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 21:19:02,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:19:03,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:19:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:19:03,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:19:03,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:19:03,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:19:03,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:19:03,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 21:19:03,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:19:03,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:19:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:19:03,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:19:03,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:19:03,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:19:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:19:03,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:19:03,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:19:03,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 21:19:03,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:19:03,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 21:19:03,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:19:03,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:19:03,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:19:03,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 21:19:03,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:19:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:19:05,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792503028] [2020-10-26 21:19:05,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:19:05,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:19:05,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355558259] [2020-10-26 21:19:05,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:19:05,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:19:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:19:05,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:19:05,105 INFO L87 Difference]: Start difference. First operand 11581 states and 15018 transitions. Second operand 7 states. [2020-10-26 21:19:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:19:33,667 INFO L93 Difference]: Finished difference Result 34407 states and 45672 transitions. [2020-10-26 21:19:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 21:19:33,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1731 [2020-10-26 21:19:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:19:33,765 INFO L225 Difference]: With dead ends: 34407 [2020-10-26 21:19:33,765 INFO L226 Difference]: Without dead ends: 22832 [2020-10-26 21:19:33,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:19:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22832 states. [2020-10-26 21:19:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22832 to 22684. [2020-10-26 21:19:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22684 states. [2020-10-26 21:19:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22684 states to 22684 states and 28670 transitions. [2020-10-26 21:19:34,369 INFO L78 Accepts]: Start accepts. Automaton has 22684 states and 28670 transitions. Word has length 1731 [2020-10-26 21:19:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:19:34,370 INFO L481 AbstractCegarLoop]: Abstraction has 22684 states and 28670 transitions. [2020-10-26 21:19:34,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:19:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 22684 states and 28670 transitions. [2020-10-26 21:19:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1791 [2020-10-26 21:19:34,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:19:34,461 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:34,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:19:34,462 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:19:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:19:34,463 INFO L82 PathProgramCache]: Analyzing trace with hash 579698403, now seen corresponding path program 1 times [2020-10-26 21:19:34,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:19:34,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431510607] [2020-10-26 21:19:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:19:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:19:35,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:19:37,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:19:40,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:19:40,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1816 [2020-10-26 21:19:40,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:19:40,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5243 [2020-10-26 21:19:40,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:19:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 21:19:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:19:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1807 [2020-10-26 21:19:40,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:19:41,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:19:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:19:41,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:19:41,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:19:41,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:19:41,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:19:41,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 21:19:41,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:19:41,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:19:41,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:19:41,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:19:41,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:19:41,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:19:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:19:41,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:19:41,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:19:41,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:19:41,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 21:19:41,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:19:41,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-26 21:19:41,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:19:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:19:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:19:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 21:19:41,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:19:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 21:19:45,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431510607] [2020-10-26 21:19:45,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:19:45,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 21:19:45,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496041464] [2020-10-26 21:19:45,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:19:45,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:19:45,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:19:45,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:19:45,057 INFO L87 Difference]: Start difference. First operand 22684 states and 28670 transitions. Second operand 7 states. [2020-10-26 21:20:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:20:24,207 INFO L93 Difference]: Finished difference Result 84159 states and 114385 transitions. [2020-10-26 21:20:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:20:24,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1790 [2020-10-26 21:20:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:20:24,433 INFO L225 Difference]: With dead ends: 84159 [2020-10-26 21:20:24,434 INFO L226 Difference]: Without dead ends: 61481 [2020-10-26 21:20:24,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:20:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61481 states. [2020-10-26 21:20:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61481 to 54310. [2020-10-26 21:20:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54310 states. [2020-10-26 21:20:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54310 states to 54310 states and 71353 transitions. [2020-10-26 21:20:26,105 INFO L78 Accepts]: Start accepts. Automaton has 54310 states and 71353 transitions. Word has length 1790 [2020-10-26 21:20:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:20:26,108 INFO L481 AbstractCegarLoop]: Abstraction has 54310 states and 71353 transitions. [2020-10-26 21:20:26,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:20:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 54310 states and 71353 transitions. [2020-10-26 21:20:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1828 [2020-10-26 21:20:27,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:20:27,157 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:27,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:20:27,157 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:20:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:20:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1931409319, now seen corresponding path program 1 times [2020-10-26 21:20:27,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:20:27,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245691805] [2020-10-26 21:20:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:20:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:20:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:20:27,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:20:29,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking...