/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/Problem13_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:13:36,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:13:36,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:13:36,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:13:36,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:13:36,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:13:36,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:13:36,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:13:36,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:13:36,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:13:36,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:13:36,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:13:36,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:13:36,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:13:36,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:13:36,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:13:36,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:13:36,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:13:36,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:13:36,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:13:36,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:13:36,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:13:36,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:13:36,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:13:36,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:13:36,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:13:36,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:13:36,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:13:36,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:13:36,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:13:36,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:13:36,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:13:36,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:13:36,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:13:36,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:13:36,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:13:36,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:13:36,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:13:36,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:13:36,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:13:36,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:13:36,490 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 23:13:36,519 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:13:36,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:13:36,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:13:36,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:13:36,522 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:13:36,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:13:36,523 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:13:36,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:13:36,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:13:36,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:13:36,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:13:36,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:13:36,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:13:36,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:13:36,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:13:36,525 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:13:36,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:13:36,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:13:36,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:13:36,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:13:36,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:13:36,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:13:36,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:13:36,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:13:36,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:13:36,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:13:36,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:13:36,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:13:36,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:13:36,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:13:36,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:13:37,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:13:37,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:13:37,009 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:13:37,010 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:13:37,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label40.c [2020-10-26 23:13:37,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9840141a/1233585c27ec4c2e8d82997000ff28ca/FLAGb345468b0 [2020-10-26 23:13:38,250 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:13:38,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label40.c [2020-10-26 23:13:38,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9840141a/1233585c27ec4c2e8d82997000ff28ca/FLAGb345468b0 [2020-10-26 23:13:38,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9840141a/1233585c27ec4c2e8d82997000ff28ca [2020-10-26 23:13:38,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:13:38,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:13:38,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:13:38,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:13:38,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:13:38,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:13:38" (1/1) ... [2020-10-26 23:13:38,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd4eaec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:38, skipping insertion in model container [2020-10-26 23:13:38,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:13:38" (1/1) ... [2020-10-26 23:13:38,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:13:38,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:13:41,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:13:41,033 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:13:41,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:13:41,815 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:13:41,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41 WrapperNode [2020-10-26 23:13:41,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:13:41,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:13:41,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:13:41,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:13:41,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41" (1/1) ... [2020-10-26 23:13:41,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41" (1/1) ... [2020-10-26 23:13:41,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41" (1/1) ... [2020-10-26 23:13:41,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41" (1/1) ... [2020-10-26 23:13:42,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41" (1/1) ... [2020-10-26 23:13:42,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41" (1/1) ... [2020-10-26 23:13:42,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41" (1/1) ... [2020-10-26 23:13:42,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:13:42,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:13:42,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:13:42,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:13:42,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41" (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 23:13:42,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:13:42,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:13:42,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:13:42,583 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:13:42,583 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:13:42,584 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:13:42,584 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:13:42,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:13:42,584 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:13:42,584 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:13:42,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:13:42,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:13:42,586 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:13:42,586 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:13:42,586 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:13:42,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:13:42,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:13:42,587 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:13:42,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:13:42,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:13:42,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:13:42,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:13:42,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:13:42,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:13:42,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:13:54,082 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:13:54,083 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:13:54,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:13:54 BoogieIcfgContainer [2020-10-26 23:13:54,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:13:54,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:13:54,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:13:54,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:13:54,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:13:38" (1/3) ... [2020-10-26 23:13:54,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70033db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:13:54, skipping insertion in model container [2020-10-26 23:13:54,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:41" (2/3) ... [2020-10-26 23:13:54,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70033db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:13:54, skipping insertion in model container [2020-10-26 23:13:54,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:13:54" (3/3) ... [2020-10-26 23:13:54,107 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label40.c [2020-10-26 23:13:54,123 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:13:54,131 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:13:54,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:13:54,278 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:13:54,278 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:13:54,279 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:13:54,279 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:13:54,279 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:13:54,279 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:13:54,279 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:13:54,279 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:13:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:13:54,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 23:13:54,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:54,361 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] [2020-10-26 23:13:54,361 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:54,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2065792798, now seen corresponding path program 1 times [2020-10-26 23:13:54,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:54,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408624045] [2020-10-26 23:13:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:55,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:55,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 23:13:55,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:55,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-26 23:13:55,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:13:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 23:13:55,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:13:55,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:55,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:55,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:55,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:55,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:55,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 23:13:55,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:55,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:55,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:55,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:55,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:13:55,614 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 23:13:55,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408624045] [2020-10-26 23:13:55,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:13:55,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:13:55,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353044699] [2020-10-26 23:13:55,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:13:55,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:13:55,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:13:55,658 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:14:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:16,674 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-26 23:14:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:14:16,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-26 23:14:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:16,721 INFO L225 Difference]: With dead ends: 3235 [2020-10-26 23:14:16,722 INFO L226 Difference]: Without dead ends: 2027 [2020-10-26 23:14:16,738 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 23:14:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-26 23:14:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-26 23:14:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-26 23:14:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-26 23:14:16,925 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 35 [2020-10-26 23:14:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:16,926 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-26 23:14:16,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:14:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-26 23:14:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 23:14:16,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:16,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:16,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:14:16,933 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:16,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1299958039, now seen corresponding path program 1 times [2020-10-26 23:14:16,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:16,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404874544] [2020-10-26 23:14:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:17,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:17,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:18,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:18,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 23:14:18,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:14:18,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1574 [2020-10-26 23:14:18,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:14:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:14:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:14:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:14:18,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:18,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:18,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:18,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:18,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:18,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:14:18,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:14:18,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:14:18,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:18,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:19,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:19,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:14:19,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:19,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-26 23:14:19,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:14:19,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:14:19,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404874544] [2020-10-26 23:14:19,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:14:19,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:14:19,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524565080] [2020-10-26 23:14:19,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:14:19,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:19,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:14:19,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:14:19,233 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 7 states. [2020-10-26 23:14:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:48,552 INFO L93 Difference]: Finished difference Result 5868 states and 9705 transitions. [2020-10-26 23:14:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:14:48,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-26 23:14:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:48,588 INFO L225 Difference]: With dead ends: 5868 [2020-10-26 23:14:48,588 INFO L226 Difference]: Without dead ends: 3864 [2020-10-26 23:14:48,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:14:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2020-10-26 23:14:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3762. [2020-10-26 23:14:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3762 states. [2020-10-26 23:14:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3762 states to 3762 states and 5633 transitions. [2020-10-26 23:14:48,775 INFO L78 Accepts]: Start accepts. Automaton has 3762 states and 5633 transitions. Word has length 110 [2020-10-26 23:14:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:48,777 INFO L481 AbstractCegarLoop]: Abstraction has 3762 states and 5633 transitions. [2020-10-26 23:14:48,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:14:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3762 states and 5633 transitions. [2020-10-26 23:14:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 23:14:48,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:48,789 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:48,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:14:48,790 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash 469073765, now seen corresponding path program 1 times [2020-10-26 23:14:48,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:48,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141832085] [2020-10-26 23:14:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:48,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:50,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:50,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 23:14:50,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:14:50,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1343 [2020-10-26 23:14:50,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:50,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:14:50,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:14:50,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:14:50,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:50,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:50,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:50,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:50,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:50,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:50,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 23:14:50,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:50,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:50,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:50,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:14:50,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:50,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:50,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:50,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:50,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:14:50,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:50,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-26 23:14:50,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:50,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:50,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:50,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:14:50,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:14:50,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141832085] [2020-10-26 23:14:50,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:14:50,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:14:50,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784593800] [2020-10-26 23:14:50,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:14:50,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:14:50,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:14:50,972 INFO L87 Difference]: Start difference. First operand 3762 states and 5633 transitions. Second operand 7 states. [2020-10-26 23:15:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:26,046 INFO L93 Difference]: Finished difference Result 11237 states and 17515 transitions. [2020-10-26 23:15:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:15:26,051 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-10-26 23:15:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:26,108 INFO L225 Difference]: With dead ends: 11237 [2020-10-26 23:15:26,108 INFO L226 Difference]: Without dead ends: 7481 [2020-10-26 23:15:26,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:15:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2020-10-26 23:15:26,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 7140. [2020-10-26 23:15:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7140 states. [2020-10-26 23:15:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 10022 transitions. [2020-10-26 23:15:26,392 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 10022 transitions. Word has length 124 [2020-10-26 23:15:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:26,396 INFO L481 AbstractCegarLoop]: Abstraction has 7140 states and 10022 transitions. [2020-10-26 23:15:26,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:15:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 10022 transitions. [2020-10-26 23:15:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-26 23:15:26,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:26,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:26,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:15:26,409 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:26,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1682064441, now seen corresponding path program 1 times [2020-10-26 23:15:26,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:26,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489996379] [2020-10-26 23:15:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:26,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:28,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:28,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-26 23:15:28,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:15:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1634 [2020-10-26 23:15:28,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:15:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:28,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:15:28,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:28,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:28,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:28,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:28,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:28,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:28,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:15:28,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:28,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:28,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:28,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:28,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:28,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:28,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:28,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:28,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:15:28,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:28,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-26 23:15:28,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:28,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:28,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:28,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:15:28,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:15:28,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489996379] [2020-10-26 23:15:28,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:15:28,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:15:28,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816184850] [2020-10-26 23:15:28,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:15:28,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:28,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:15:28,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:15:28,717 INFO L87 Difference]: Start difference. First operand 7140 states and 10022 transitions. Second operand 7 states. [2020-10-26 23:15:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:59,406 INFO L93 Difference]: Finished difference Result 15603 states and 22915 transitions. [2020-10-26 23:15:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:15:59,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 150 [2020-10-26 23:15:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:59,455 INFO L225 Difference]: With dead ends: 15603 [2020-10-26 23:15:59,456 INFO L226 Difference]: Without dead ends: 8469 [2020-10-26 23:15:59,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 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 23:15:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8469 states. [2020-10-26 23:15:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8469 to 8151. [2020-10-26 23:15:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8151 states. [2020-10-26 23:15:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8151 states to 8151 states and 10824 transitions. [2020-10-26 23:15:59,778 INFO L78 Accepts]: Start accepts. Automaton has 8151 states and 10824 transitions. Word has length 150 [2020-10-26 23:15:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:59,781 INFO L481 AbstractCegarLoop]: Abstraction has 8151 states and 10824 transitions. [2020-10-26 23:15:59,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:15:59,781 INFO L276 IsEmpty]: Start isEmpty. Operand 8151 states and 10824 transitions. [2020-10-26 23:15:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-26 23:15:59,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:59,784 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:59,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:15:59,784 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1442921468, now seen corresponding path program 1 times [2020-10-26 23:15:59,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:59,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242883465] [2020-10-26 23:15:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:00,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:00,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 23:16:00,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:00,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-26 23:16:00,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:16:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:16:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 23:16:00,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:00,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:16:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:00,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:00,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:00,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:16:00,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:00,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 23:16:00,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:00,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:16:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:16:00,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:00,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:16:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:00,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:00,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:00,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:16:00,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:00,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 23:16:00,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:16:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:16:00,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:16:00,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242883465] [2020-10-26 23:16:00,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:16:00,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:16:00,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324870077] [2020-10-26 23:16:00,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:16:00,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:16:00,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:16:00,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:16:00,697 INFO L87 Difference]: Start difference. First operand 8151 states and 10824 transitions. Second operand 5 states. [2020-10-26 23:16:01,711 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:16:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:16:26,984 INFO L93 Difference]: Finished difference Result 18980 states and 25388 transitions. [2020-10-26 23:16:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:16:26,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-10-26 23:16:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:16:27,039 INFO L225 Difference]: With dead ends: 18980 [2020-10-26 23:16:27,039 INFO L226 Difference]: Without dead ends: 11638 [2020-10-26 23:16:27,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:16:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11638 states. [2020-10-26 23:16:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11638 to 11625. [2020-10-26 23:16:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11625 states. [2020-10-26 23:16:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11625 states to 11625 states and 14908 transitions. [2020-10-26 23:16:27,359 INFO L78 Accepts]: Start accepts. Automaton has 11625 states and 14908 transitions. Word has length 164 [2020-10-26 23:16:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:16:27,359 INFO L481 AbstractCegarLoop]: Abstraction has 11625 states and 14908 transitions. [2020-10-26 23:16:27,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:16:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 11625 states and 14908 transitions. [2020-10-26 23:16:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 23:16:27,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:16:27,364 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:16:27,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:16:27,365 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:16:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:16:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1032437766, now seen corresponding path program 1 times [2020-10-26 23:16:27,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:16:27,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818469760] [2020-10-26 23:16:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:16:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:27,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:27,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:29,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:32,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:32,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 23:16:32,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:16:32,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 23:16:32,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:32,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:16:32,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:16:32,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:16:32,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:32,638 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:16:32,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:16:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:32,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:32,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:32,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:16:32,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:32,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 23:16:32,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:16:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:16:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:32,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:16:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:32,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:32,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:32,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:16:32,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:32,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 23:16:32,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:32,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:16:32,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:16:32,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:16:32,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:33,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:16:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:33,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:33,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:33,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:16:33,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:33,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 23:16:33,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:16:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-26 23:16:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:16:33,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 54 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:16:33,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818469760] [2020-10-26 23:16:33,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:16:33,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:16:33,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041185426] [2020-10-26 23:16:33,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:16:33,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:16:33,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:16:33,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:16:33,389 INFO L87 Difference]: Start difference. First operand 11625 states and 14908 transitions. Second operand 7 states. [2020-10-26 23:16:33,560 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:16:35,590 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:17:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:17:01,858 INFO L93 Difference]: Finished difference Result 22739 states and 29505 transitions. [2020-10-26 23:17:01,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:17:01,863 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2020-10-26 23:17:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:17:01,910 INFO L225 Difference]: With dead ends: 22739 [2020-10-26 23:17:01,910 INFO L226 Difference]: Without dead ends: 11923 [2020-10-26 23:17:01,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:17:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11923 states. [2020-10-26 23:17:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11923 to 11783. [2020-10-26 23:17:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11783 states. [2020-10-26 23:17:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11783 states to 11783 states and 15224 transitions. [2020-10-26 23:17:02,262 INFO L78 Accepts]: Start accepts. Automaton has 11783 states and 15224 transitions. Word has length 217 [2020-10-26 23:17:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:17:02,262 INFO L481 AbstractCegarLoop]: Abstraction has 11783 states and 15224 transitions. [2020-10-26 23:17:02,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:17:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 11783 states and 15224 transitions. [2020-10-26 23:17:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-26 23:17:02,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:02,269 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:17:02,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:17:02,269 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:02,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:02,272 INFO L82 PathProgramCache]: Analyzing trace with hash 611321473, now seen corresponding path program 1 times [2020-10-26 23:17:02,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:02,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943305086] [2020-10-26 23:17:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:02,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:02,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:03,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:05,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:05,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-26 23:17:05,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:17:05,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3240 [2020-10-26 23:17:05,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:05,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:17:05,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:17:05,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-26 23:17:05,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:05,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:05,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:05,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:05,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:05,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:17:05,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:05,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:05,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:05,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:17:05,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:05,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:17:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:05,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:05,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:06,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:06,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:17:06,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:17:06,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-26 23:17:06,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 23:17:06,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:17:06,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:17:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:06,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:06,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:06,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:17:06,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:06,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-26 23:17:06,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:06,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:06,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:06,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:17:06,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:17:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-26 23:17:06,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943305086] [2020-10-26 23:17:06,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:17:06,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:17:06,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046927149] [2020-10-26 23:17:06,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:17:06,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:17:06,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:17:06,826 INFO L87 Difference]: Start difference. First operand 11783 states and 15224 transitions. Second operand 7 states. [2020-10-26 23:17:07,003 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66