/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_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:18:45,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:18:45,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:18:45,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:18:45,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:18:45,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:18:45,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:18:45,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:18:45,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:18:45,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:18:45,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:18:45,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:18:45,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:18:45,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:18:45,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:18:45,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:18:45,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:18:45,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:18:45,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:18:45,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:18:45,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:18:45,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:18:45,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:18:45,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:18:45,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:18:45,530 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:18:45,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:18:45,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:18:45,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:18:45,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:18:45,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:18:45,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:18:45,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:18:45,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:18:45,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:18:45,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:18:45,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:18:45,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:18:45,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:18:45,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:18:45,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:18:45,553 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 14:18:45,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:18:45,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:18:45,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:18:45,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:18:45,607 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:18:45,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:18:45,607 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:18:45,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:18:45,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:18:45,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:18:45,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:18:45,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:18:45,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:18:45,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:18:45,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:18:45,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:18:45,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:18:45,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:18:45,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:18:45,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:18:45,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:18:45,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:18:45,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:18:45,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:18:45,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:18:45,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:18:45,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:18:45,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:18:45,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:18:45,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:18:46,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:18:46,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:18:46,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:18:46,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:18:46,075 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:18:46,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label58.c [2020-10-28 14:18:46,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ad1a8e6b/56a516e4c6654936ab1c364d0162e969/FLAGb128bd42e [2020-10-28 14:18:47,375 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:18:47,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label58.c [2020-10-28 14:18:47,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ad1a8e6b/56a516e4c6654936ab1c364d0162e969/FLAGb128bd42e [2020-10-28 14:18:47,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ad1a8e6b/56a516e4c6654936ab1c364d0162e969 [2020-10-28 14:18:47,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:18:47,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:18:47,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:18:47,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:18:47,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:18:47,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:18:47" (1/1) ... [2020-10-28 14:18:47,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16bc4d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:47, skipping insertion in model container [2020-10-28 14:18:47,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:18:47" (1/1) ... [2020-10-28 14:18:47,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:18:47,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:18:50,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:18:50,218 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:18:51,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:18:51,400 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:18:51,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51 WrapperNode [2020-10-28 14:18:51,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:18:51,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:18:51,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:18:51,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:18:51,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51" (1/1) ... [2020-10-28 14:18:51,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51" (1/1) ... [2020-10-28 14:18:51,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51" (1/1) ... [2020-10-28 14:18:51,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51" (1/1) ... [2020-10-28 14:18:51,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51" (1/1) ... [2020-10-28 14:18:51,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51" (1/1) ... [2020-10-28 14:18:51,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51" (1/1) ... [2020-10-28 14:18:52,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:18:52,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:18:52,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:18:52,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:18:52,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51" (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 14:18:52,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:18:52,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:18:52,192 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:18:52,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:18:52,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:18:52,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:18:52,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:18:52,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:18:52,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:18:52,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:18:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:18:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:18:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:18:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:18:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:18:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:18:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:18:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:18:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:18:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:18:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:18:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:18:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:18:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:18:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:18:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:18:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:18:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:18:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:19:06,457 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:19:06,458 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:19:06,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:19:06 BoogieIcfgContainer [2020-10-28 14:19:06,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:19:06,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:19:06,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:19:06,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:19:06,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:18:47" (1/3) ... [2020-10-28 14:19:06,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f4ea08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:19:06, skipping insertion in model container [2020-10-28 14:19:06,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:18:51" (2/3) ... [2020-10-28 14:19:06,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f4ea08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:19:06, skipping insertion in model container [2020-10-28 14:19:06,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:19:06" (3/3) ... [2020-10-28 14:19:06,478 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label58.c [2020-10-28 14:19:06,492 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:19:06,499 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:19:06,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:19:06,576 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:19:06,576 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:19:06,576 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:19:06,576 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:19:06,577 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:19:06,577 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:19:06,577 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:19:06,577 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:19:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:19:06,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:19:06,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:19:06,640 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] [2020-10-28 14:19:06,641 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:19:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:19:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash -622462523, now seen corresponding path program 1 times [2020-10-28 14:19:06,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:19:06,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340721112] [2020-10-28 14:19:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:19:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:07,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:07,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:19:07,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:07,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-28 14:19:07,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:07,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:07,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:19:07,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:19:07,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:19:07,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:19:07,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:19:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:07,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:07,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:07,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:19:07,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:07,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 14:19:07,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:07,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:07,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:19:07,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:19:07,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:19:07,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:19:07,631 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 14:19:07,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340721112] [2020-10-28 14:19:07,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:19:07,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:19:07,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4442032] [2020-10-28 14:19:07,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:19:07,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:19:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:19:07,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:19:07,659 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:19:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:19:40,139 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-28 14:19:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:19:40,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:19:40,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:19:40,201 INFO L225 Difference]: With dead ends: 5116 [2020-10-28 14:19:40,201 INFO L226 Difference]: Without dead ends: 3271 [2020-10-28 14:19:40,217 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 [2020-10-28 14:19:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-28 14:19:40,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-28 14:19:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-28 14:19:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-28 14:19:40,479 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 20 [2020-10-28 14:19:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:19:40,480 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-28 14:19:40,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:19:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-28 14:19:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 14:19:40,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:19:40,491 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:19:40,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:19:40,492 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:19:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:19:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1643555765, now seen corresponding path program 1 times [2020-10-28 14:19:40,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:19:40,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040299648] [2020-10-28 14:19:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:19:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:40,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:41,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:41,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:41,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 14:19:41,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:19:41,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1358 [2020-10-28 14:19:41,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:41,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:19:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:19:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 14:19:41,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:19:42,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:19:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:42,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:42,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:42,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:19:42,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:42,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 14:19:42,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:42,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:19:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:19:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:19:42,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:19:42,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:19:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:42,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:42,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:42,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:19:42,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:42,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-28 14:19:42,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:42,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:42,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:19:42,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:19:42,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 14:19:42,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:19:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:19:42,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040299648] [2020-10-28 14:19:42,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:19:42,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:19:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137235398] [2020-10-28 14:19:42,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:19:42,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:19:42,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:19:42,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:19:42,612 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 8 states. [2020-10-28 14:20:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:20:38,662 INFO L93 Difference]: Finished difference Result 12278 states and 21500 transitions. [2020-10-28 14:20:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:20:38,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 92 [2020-10-28 14:20:38,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:20:38,737 INFO L225 Difference]: With dead ends: 12278 [2020-10-28 14:20:38,737 INFO L226 Difference]: Without dead ends: 9084 [2020-10-28 14:20:38,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:20:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9084 states. [2020-10-28 14:20:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9084 to 9013. [2020-10-28 14:20:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9013 states. [2020-10-28 14:20:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9013 states to 9013 states and 14180 transitions. [2020-10-28 14:20:39,126 INFO L78 Accepts]: Start accepts. Automaton has 9013 states and 14180 transitions. Word has length 92 [2020-10-28 14:20:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:20:39,127 INFO L481 AbstractCegarLoop]: Abstraction has 9013 states and 14180 transitions. [2020-10-28 14:20:39,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:20:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 9013 states and 14180 transitions. [2020-10-28 14:20:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 14:20:39,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:20:39,139 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:20:39,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:20:39,140 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:20:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:20:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash 646003824, now seen corresponding path program 1 times [2020-10-28 14:20:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:20:39,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065919340] [2020-10-28 14:20:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:20:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:20:39,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:20:39,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:20:40,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:20:40,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 14:20:40,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:20:40,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-28 14:20:40,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:20:40,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:20:40,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:20:40,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:20:40,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 14:20:40,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:20:40,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:20:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:20:40,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:20:40,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:20:40,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:20:40,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:20:40,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:20:40,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:20:40,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:20:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:20:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:20:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:20:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:20:40,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:20:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:20:40,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:20:40,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:20:40,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 14:20:40,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:20:40,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 14:20:40,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:20:40,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:20:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:20:40,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:20:40,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:20:40,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:20:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:20:40,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065919340] [2020-10-28 14:20:40,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:20:40,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:20:40,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293533582] [2020-10-28 14:20:40,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:20:40,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:20:40,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:20:40,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:20:40,545 INFO L87 Difference]: Start difference. First operand 9013 states and 14180 transitions. Second operand 7 states. [2020-10-28 14:21:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:21:37,602 INFO L93 Difference]: Finished difference Result 27467 states and 44329 transitions. [2020-10-28 14:21:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:21:37,605 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-28 14:21:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:21:37,728 INFO L225 Difference]: With dead ends: 27467 [2020-10-28 14:21:37,728 INFO L226 Difference]: Without dead ends: 18460 [2020-10-28 14:21:37,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 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 14:21:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18460 states. [2020-10-28 14:21:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18460 to 18119. [2020-10-28 14:21:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18119 states. [2020-10-28 14:21:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18119 states to 18119 states and 28097 transitions. [2020-10-28 14:21:38,426 INFO L78 Accepts]: Start accepts. Automaton has 18119 states and 28097 transitions. Word has length 101 [2020-10-28 14:21:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:21:38,427 INFO L481 AbstractCegarLoop]: Abstraction has 18119 states and 28097 transitions. [2020-10-28 14:21:38,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:21:38,427 INFO L276 IsEmpty]: Start isEmpty. Operand 18119 states and 28097 transitions. [2020-10-28 14:21:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 14:21:38,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:21:38,437 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:21:38,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:21:38,439 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:21:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:21:38,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1803499366, now seen corresponding path program 1 times [2020-10-28 14:21:38,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:21:38,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627287825] [2020-10-28 14:21:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:21:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:21:38,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:21:38,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:21:39,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:21:39,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 14:21:39,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:21:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1269 [2020-10-28 14:21:39,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:21:39,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:21:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:21:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:21:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:21:39,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:21:39,976 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:21:39,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:21:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:21:39,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:21:40,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:21:40,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:21:40,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:21:40,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:21:40,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:21:40,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:21:40,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:21:40,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:21:40,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:21:40,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:21:40,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:21:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:21:40,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:21:40,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:21:40,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:21:40,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:21:40,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-28 14:21:40,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:21:40,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:21:40,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:21:40,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:21:40,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:21:40,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:21:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:21:40,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627287825] [2020-10-28 14:21:40,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:21:40,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:21:40,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818788127] [2020-10-28 14:21:40,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:21:40,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:21:40,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:21:40,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:21:40,455 INFO L87 Difference]: Start difference. First operand 18119 states and 28097 transitions. Second operand 7 states. [2020-10-28 14:21:40,633 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:21:44,871 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:22:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:47,920 INFO L93 Difference]: Finished difference Result 55449 states and 88653 transitions. [2020-10-28 14:22:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:22:47,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-10-28 14:22:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:48,089 INFO L225 Difference]: With dead ends: 55449 [2020-10-28 14:22:48,089 INFO L226 Difference]: Without dead ends: 37336 [2020-10-28 14:22:48,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:22:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37336 states. [2020-10-28 14:22:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37336 to 32227. [2020-10-28 14:22:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32227 states. [2020-10-28 14:22:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32227 states to 32227 states and 46119 transitions. [2020-10-28 14:22:49,288 INFO L78 Accepts]: Start accepts. Automaton has 32227 states and 46119 transitions. Word has length 121 [2020-10-28 14:22:49,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:49,290 INFO L481 AbstractCegarLoop]: Abstraction has 32227 states and 46119 transitions. [2020-10-28 14:22:49,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:22:49,290 INFO L276 IsEmpty]: Start isEmpty. Operand 32227 states and 46119 transitions. [2020-10-28 14:22:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-28 14:22:49,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:49,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:49,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:22:49,297 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash 350901052, now seen corresponding path program 1 times [2020-10-28 14:22:49,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:49,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468473961] [2020-10-28 14:22:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:49,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking...