/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/Problem19_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:07:29,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:07:29,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:07:29,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:07:29,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:07:29,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:07:29,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:07:29,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:07:29,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:07:29,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:07:29,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:07:29,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:07:29,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:07:29,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:07:29,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:07:29,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:07:29,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:07:29,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:07:29,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:07:29,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:07:29,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:07:29,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:07:29,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:07:29,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:07:29,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:07:29,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:07:29,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:07:29,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:07:29,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:07:29,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:07:29,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:07:29,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:07:29,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:07:29,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:07:29,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:07:29,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:07:29,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:07:29,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:07:29,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:07:29,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:07:29,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:07:29,490 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 [2020-10-28 14:07:29,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:07:29,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:07:29,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:07:29,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:07:29,520 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:07:29,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:07:29,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:07:29,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:07:29,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:07:29,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:07:29,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:07:29,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:07:29,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:07:29,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:07:29,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:07:29,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:07:29,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:07:29,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:07:29,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:07:29,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:07:29,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:07:29,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:07:29,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:07:29,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:07:29,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:07:29,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:07:29,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:07:29,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:07:29,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:07:29,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:07:29,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:07:29,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:07:29,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:07:29,969 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:07:29,970 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:07:29,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label21.c [2020-10-28 14:07:30,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/118e5a445/b3a6a601c13140c08ee5685796cfbe0c/FLAG32f23895a [2020-10-28 14:07:31,254 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:07:31,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label21.c [2020-10-28 14:07:31,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/118e5a445/b3a6a601c13140c08ee5685796cfbe0c/FLAG32f23895a [2020-10-28 14:07:31,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/118e5a445/b3a6a601c13140c08ee5685796cfbe0c [2020-10-28 14:07:31,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:07:31,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:07:31,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:07:31,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:07:31,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:07:31,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:07:31" (1/1) ... [2020-10-28 14:07:31,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ebb2c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:31, skipping insertion in model container [2020-10-28 14:07:31,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:07:31" (1/1) ... [2020-10-28 14:07:31,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:07:31,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:07:33,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:07:33,896 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:07:35,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:07:35,124 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:07:35,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35 WrapperNode [2020-10-28 14:07:35,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:07:35,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:07:35,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:07:35,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:07:35,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35" (1/1) ... [2020-10-28 14:07:35,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35" (1/1) ... [2020-10-28 14:07:35,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35" (1/1) ... [2020-10-28 14:07:35,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35" (1/1) ... [2020-10-28 14:07:35,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35" (1/1) ... [2020-10-28 14:07:35,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35" (1/1) ... [2020-10-28 14:07:35,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35" (1/1) ... [2020-10-28 14:07:35,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:07:35,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:07:35,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:07:35,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:07:35,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35" (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 [2020-10-28 14:07:35,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:07:35,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:07:35,944 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:07:35,944 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:07:35,944 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:07:35,944 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:07:35,946 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:07:35,946 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:07:35,946 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:07:35,946 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:07:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:07:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:07:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:07:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:07:35,948 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:07:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:07:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:07:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:07:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:07:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:07:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:07:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:07:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:07:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:07:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:07:35,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:07:35,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:07:35,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:07:35,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:07:49,485 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:07:49,486 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:07:49,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:07:49 BoogieIcfgContainer [2020-10-28 14:07:49,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:07:49,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:07:49,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:07:49,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:07:49,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:07:31" (1/3) ... [2020-10-28 14:07:49,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6411f2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:07:49, skipping insertion in model container [2020-10-28 14:07:49,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:35" (2/3) ... [2020-10-28 14:07:49,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6411f2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:07:49, skipping insertion in model container [2020-10-28 14:07:49,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:07:49" (3/3) ... [2020-10-28 14:07:49,504 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label21.c [2020-10-28 14:07:49,516 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:07:49,523 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:07:49,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:07:49,587 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:07:49,588 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:07:49,588 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:07:49,588 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:07:49,588 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:07:49,588 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:07:49,588 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:07:49,589 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:07:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:07:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:07:49,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:07:49,650 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] [2020-10-28 14:07:49,650 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:07:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:07:49,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1222229779, now seen corresponding path program 1 times [2020-10-28 14:07:49,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:07:49,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451638076] [2020-10-28 14:07:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:07:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:07:50,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:50,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:50,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:07:50,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:07:50,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-28 14:07:50,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:50,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:50,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:07:50,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:07:50,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:07:50,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:07:50,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:07:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:07:50,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:50,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:50,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:07:50,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:07:50,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 14:07:50,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:50,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:50,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:07:50,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:07:50,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:07:50,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:07:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:07:50,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451638076] [2020-10-28 14:07:50,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:07:50,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:07:50,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394404772] [2020-10-28 14:07:50,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:07:50,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:07:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:07:50,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:07:50,603 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:08:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:08:16,207 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-28 14:08:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:08:16,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 14:08:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:08:16,268 INFO L225 Difference]: With dead ends: 5100 [2020-10-28 14:08:16,268 INFO L226 Difference]: Without dead ends: 3255 [2020-10-28 14:08:16,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:08:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-28 14:08:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-28 14:08:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-28 14:08:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-28 14:08:16,531 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 22 [2020-10-28 14:08:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:08:16,532 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-28 14:08:16,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:08:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-28 14:08:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 14:08:16,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:08:16,541 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:08:16,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:08:16,541 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:08:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:08:16,542 INFO L82 PathProgramCache]: Analyzing trace with hash 761029028, now seen corresponding path program 1 times [2020-10-28 14:08:16,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:08:16,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708109210] [2020-10-28 14:08:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:08:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:17,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:17,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:18,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:18,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 14:08:18,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:08:18,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1397 [2020-10-28 14:08:18,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:18,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:18,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:08:18,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:08:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 14:08:18,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:08:18,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:08:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:18,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:18,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:18,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:08:18,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:08:18,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:08:18,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:18,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:18,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:08:18,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:08:18,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:08:18,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:08:18,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:08:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:18,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:18,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:18,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:08:18,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:08:18,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-28 14:08:18,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:18,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:08:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:08:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:08:18,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:08:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:08:18,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708109210] [2020-10-28 14:08:18,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:08:18,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:08:18,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108807044] [2020-10-28 14:08:18,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:08:18,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:08:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:08:18,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:08:18,552 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-28 14:08:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:08:57,748 INFO L93 Difference]: Finished difference Result 9572 states and 15537 transitions. [2020-10-28 14:08:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:08:57,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-28 14:08:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:08:57,793 INFO L225 Difference]: With dead ends: 9572 [2020-10-28 14:08:57,793 INFO L226 Difference]: Without dead ends: 6369 [2020-10-28 14:08:57,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:08:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2020-10-28 14:08:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 6276. [2020-10-28 14:08:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6276 states. [2020-10-28 14:08:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 8872 transitions. [2020-10-28 14:08:58,025 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 8872 transitions. Word has length 97 [2020-10-28 14:08:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:08:58,026 INFO L481 AbstractCegarLoop]: Abstraction has 6276 states and 8872 transitions. [2020-10-28 14:08:58,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:08:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 8872 transitions. [2020-10-28 14:08:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 14:08:58,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:08:58,037 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:08:58,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:08:58,037 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:08:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:08:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1533726441, now seen corresponding path program 1 times [2020-10-28 14:08:58,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:08:58,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475543851] [2020-10-28 14:08:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:08:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:58,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:58,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:59,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:59,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:59,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 14:08:59,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:08:59,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1889 [2020-10-28 14:08:59,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:59,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:59,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:08:59,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-28 14:08:59,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:08:59,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:09:00,128 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:09:00,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:09:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:00,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:00,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:00,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:09:00,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:09:00,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:09:00,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:00,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:00,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:09:00,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:09:00,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:09:00,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:09:00,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:09:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:00,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:00,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 14:09:00,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:09:00,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-28 14:09:00,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:00,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:00,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:09:00,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 14:09:00,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:09:00,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:09:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:09:00,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475543851] [2020-10-28 14:09:00,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:09:00,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:09:00,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44999725] [2020-10-28 14:09:00,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:09:00,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:09:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:09:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:09:00,349 INFO L87 Difference]: Start difference. First operand 6276 states and 8872 transitions. Second operand 5 states. [2020-10-28 14:09:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:09:33,391 INFO L93 Difference]: Finished difference Result 18230 states and 26132 transitions. [2020-10-28 14:09:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:09:33,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-28 14:09:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:09:33,469 INFO L225 Difference]: With dead ends: 18230 [2020-10-28 14:09:33,470 INFO L226 Difference]: Without dead ends: 11960 [2020-10-28 14:09:33,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:09:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11960 states. [2020-10-28 14:09:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11960 to 11950. [2020-10-28 14:09:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11950 states. [2020-10-28 14:09:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11950 states to 11950 states and 16687 transitions. [2020-10-28 14:09:33,833 INFO L78 Accepts]: Start accepts. Automaton has 11950 states and 16687 transitions. Word has length 108 [2020-10-28 14:09:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:09:33,836 INFO L481 AbstractCegarLoop]: Abstraction has 11950 states and 16687 transitions. [2020-10-28 14:09:33,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:09:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 11950 states and 16687 transitions. [2020-10-28 14:09:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 14:09:33,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:09:33,849 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:09:33,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:09:33,850 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:09:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:09:33,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1111024615, now seen corresponding path program 1 times [2020-10-28 14:09:33,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:09:33,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670355807] [2020-10-28 14:09:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:09:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:33,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:34,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-28 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:34,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:09:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:09:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 14:09:34,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:09:35,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:09:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:35,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:35,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:35,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:09:35,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:09:35,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 14:09:35,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:35,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:35,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:09:35,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:09:35,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:09:35,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:09:35,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:09:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:35,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:35,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:35,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 14:09:35,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:09:35,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-28 14:09:35,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:35,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:35,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:09:35,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:09:35,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 14:09:35,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:09:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:09:35,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670355807] [2020-10-28 14:09:35,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:09:35,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:09:35,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596368371] [2020-10-28 14:09:35,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:09:35,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:09:35,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:09:35,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:09:35,481 INFO L87 Difference]: Start difference. First operand 11950 states and 16687 transitions. Second operand 7 states. [2020-10-28 14:09:35,639 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:10:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:10:34,335 INFO L93 Difference]: Finished difference Result 28445 states and 41788 transitions. [2020-10-28 14:10:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:10:34,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-28 14:10:34,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:10:34,404 INFO L225 Difference]: With dead ends: 28445 [2020-10-28 14:10:34,404 INFO L226 Difference]: Without dead ends: 16501 [2020-10-28 14:10:34,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:10:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16501 states. [2020-10-28 14:10:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16501 to 14856. [2020-10-28 14:10:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14856 states. [2020-10-28 14:10:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14856 states to 14856 states and 21540 transitions. [2020-10-28 14:10:34,799 INFO L78 Accepts]: Start accepts. Automaton has 14856 states and 21540 transitions. Word has length 108 [2020-10-28 14:10:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:10:34,802 INFO L481 AbstractCegarLoop]: Abstraction has 14856 states and 21540 transitions. [2020-10-28 14:10:34,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:10:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 14856 states and 21540 transitions. [2020-10-28 14:10:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-28 14:10:34,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:10:34,807 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:10:34,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:10:34,807 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:10:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:10:34,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1212893835, now seen corresponding path program 1 times [2020-10-28 14:10:34,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:10:34,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660146089] [2020-10-28 14:10:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:10:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:34,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:35,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:36,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:36,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-28 14:10:36,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:10:36,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1279 [2020-10-28 14:10:36,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:36,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:10:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:10:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-28 14:10:36,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:10:36,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:10:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:36,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:36,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:36,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:10:36,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:10:36,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:10:36,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:36,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:36,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:10:36,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:10:36,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:10:36,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:10:36,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:10:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:36,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:36,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:36,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 14:10:36,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:10:36,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-28 14:10:36,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:36,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:10:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:10:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-28 14:10:36,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:10:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:10:36,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660146089] [2020-10-28 14:10:36,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:10:36,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:10:36,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046762651] [2020-10-28 14:10:36,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:10:36,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:10:36,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:10:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:10:36,805 INFO L87 Difference]: Start difference. First operand 14856 states and 21540 transitions. Second operand 7 states. [2020-10-28 14:10:36,961 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:11:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:11:34,113 INFO L93 Difference]: Finished difference Result 38909 states and 56316 transitions. [2020-10-28 14:11:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:11:34,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2020-10-28 14:11:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:11:34,202 INFO L225 Difference]: With dead ends: 38909 [2020-10-28 14:11:34,202 INFO L226 Difference]: Without dead ends: 24059 [2020-10-28 14:11:34,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:11:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24059 states. [2020-10-28 14:11:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24059 to 23832. [2020-10-28 14:11:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23832 states. [2020-10-28 14:11:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23832 states to 23832 states and 32033 transitions. [2020-10-28 14:11:34,740 INFO L78 Accepts]: Start accepts. Automaton has 23832 states and 32033 transitions. Word has length 164 [2020-10-28 14:11:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:11:34,740 INFO L481 AbstractCegarLoop]: Abstraction has 23832 states and 32033 transitions. [2020-10-28 14:11:34,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:11:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 23832 states and 32033 transitions. [2020-10-28 14:11:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-28 14:11:34,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:11:34,743 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:11:34,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:11:34,743 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:11:34,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:11:34,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1773302052, now seen corresponding path program 1 times [2020-10-28 14:11:34,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:11:34,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098879741] [2020-10-28 14:11:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:11:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:34,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:35,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:36,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:36,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-28 14:11:36,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:11:36,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1225 [2020-10-28 14:11:36,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:36,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:36,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:11:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:11:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-28 14:11:36,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:11:36,199 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:11:36,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:11:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:36,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:36,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:36,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:11:36,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:36,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:11:36,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:36,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:11:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:11:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:11:36,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:11:36,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:11:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:36,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:36,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:36,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 14:11:36,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:36,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-28 14:11:36,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:36,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:36,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:11:36,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:11:36,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-28 14:11:36,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0