/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:54:34,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:54:34,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:54:34,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:54:34,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:54:34,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:54:34,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:54:34,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:54:34,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:54:34,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:54:34,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:54:34,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:54:34,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:54:34,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:54:34,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:54:34,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:54:34,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:54:34,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:54:34,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:54:34,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:54:34,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:54:34,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:54:34,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:54:34,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:54:34,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:54:34,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:54:34,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:54:34,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:54:34,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:54:34,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:54:34,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:54:34,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:54:34,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:54:34,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:54:34,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:54:34,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:54:34,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:54:34,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:54:34,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:54:34,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:54:34,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:54:34,540 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 [2020-10-29 08:54:34,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:54:34,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:54:34,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:54:34,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:54:34,569 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:54:34,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:54:34,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:54:34,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:54:34,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:54:34,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:54:34,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:54:34,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:54:34,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:54:34,571 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:54:34,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:54:34,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:54:34,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:54:34,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:54:34,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:54:34,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:54:34,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:54:34,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:54:34,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:54:34,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:54:34,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:54:34,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:54:34,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:54:34,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:54:34,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:54:34,574 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:54:34,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:54:34,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:54:34,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:54:34,969 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:54:34,970 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:54:34,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label42.c [2020-10-29 08:54:35,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd3596d05/e10cd30f370e471c8a96d52f98bad1d1/FLAGdd448b097 [2020-10-29 08:54:36,318 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:54:36,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label42.c [2020-10-29 08:54:36,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd3596d05/e10cd30f370e471c8a96d52f98bad1d1/FLAGdd448b097 [2020-10-29 08:54:36,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd3596d05/e10cd30f370e471c8a96d52f98bad1d1 [2020-10-29 08:54:36,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:54:36,555 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:54:36,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:54:36,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:54:36,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:54:36,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:54:36" (1/1) ... [2020-10-29 08:54:36,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3edf0ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:36, skipping insertion in model container [2020-10-29 08:54:36,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:54:36" (1/1) ... [2020-10-29 08:54:36,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:54:36,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:54:39,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:54:39,148 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:54:40,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:54:40,550 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:54:40,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40 WrapperNode [2020-10-29 08:54:40,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:54:40,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:54:40,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:54:40,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:54:40,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:40,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:40,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:40,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:40,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:40,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:41,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:41,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:54:41,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:54:41,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:54:41,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:54:41,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (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 [2020-10-29 08:54:41,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:54:41,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:54:41,397 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:54:41,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:54:41,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:54:41,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:54:41,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:54:41,398 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:54:41,398 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:54:41,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:54:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:54:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:54:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:54:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:54:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:54:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:54:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:54:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:54:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:54:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:54:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:54:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:54:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:54:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:54:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:54:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:54:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:54:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:54:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:54:55,526 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:54:55,528 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:54:55,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:54:55 BoogieIcfgContainer [2020-10-29 08:54:55,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:54:55,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:54:55,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:54:55,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:54:55,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:54:36" (1/3) ... [2020-10-29 08:54:55,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff54c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:54:55, skipping insertion in model container [2020-10-29 08:54:55,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (2/3) ... [2020-10-29 08:54:55,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff54c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:54:55, skipping insertion in model container [2020-10-29 08:54:55,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:54:55" (3/3) ... [2020-10-29 08:54:55,542 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label42.c [2020-10-29 08:54:55,554 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:54:55,560 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:54:55,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:54:55,611 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:54:55,611 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:54:55,612 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:54:55,612 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:54:55,612 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:54:55,612 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:54:55,612 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:54:55,612 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:54:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:54:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 08:54:55,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:54:55,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:54:55,677 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:54:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:54:55,692 INFO L82 PathProgramCache]: Analyzing trace with hash -302746763, now seen corresponding path program 1 times [2020-10-29 08:54:55,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:54:55,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066457534] [2020-10-29 08:54:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:54:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:54:55,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:54:56,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:54:56,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 08:54:56,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:54:56,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-29 08:54:56,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:54:56,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:54:56,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:54:56,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:54:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 08:54:56,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:54:56,705 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2020-10-29 08:54:56,834 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:54:56,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:54:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:54:56,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:54:56,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:54:56,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:54:56,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:54:56,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 08:54:56,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:54:56,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:54:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:54:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:54:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:54:56,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:54:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:54:56,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066457534] [2020-10-29 08:54:56,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:54:56,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 08:54:56,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440883234] [2020-10-29 08:54:56,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:54:56,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:54:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:54:56,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:54:56,958 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-29 08:54:57,133 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:55:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:55:35,890 INFO L93 Difference]: Finished difference Result 6593 states and 12530 transitions. [2020-10-29 08:55:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:55:35,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-29 08:55:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:55:35,955 INFO L225 Difference]: With dead ends: 6593 [2020-10-29 08:55:35,955 INFO L226 Difference]: Without dead ends: 4744 [2020-10-29 08:55:35,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:55:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2020-10-29 08:55:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4623. [2020-10-29 08:55:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4623 states. [2020-10-29 08:55:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 8149 transitions. [2020-10-29 08:55:36,226 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 8149 transitions. Word has length 16 [2020-10-29 08:55:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:55:36,226 INFO L481 AbstractCegarLoop]: Abstraction has 4623 states and 8149 transitions. [2020-10-29 08:55:36,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:55:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 8149 transitions. [2020-10-29 08:55:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 08:55:36,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:55:36,231 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:55:36,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:55:36,232 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:55:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:55:36,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1900298053, now seen corresponding path program 1 times [2020-10-29 08:55:36,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:55:36,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755923728] [2020-10-29 08:55:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:55:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:55:36,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:36,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:37,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:55:37,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 08:55:37,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:55:37,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-29 08:55:37,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:55:37,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:55:37,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:55:37,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:55:37,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 08:55:37,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:55:37,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:55:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:55:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:37,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:55:37,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:55:37,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:55:37,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 08:55:37,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:55:37,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:55:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:55:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:55:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:55:37,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:55:37,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:55:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:55:37,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:38,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:55:38,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 08:55:38,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:55:38,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-29 08:55:38,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:55:38,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:55:38,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:55:38,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:55:38,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 08:55:38,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:55:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:55:38,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755923728] [2020-10-29 08:55:38,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:55:38,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:55:38,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8971638] [2020-10-29 08:55:38,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:55:38,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:55:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:55:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:55:38,225 INFO L87 Difference]: Start difference. First operand 4623 states and 8149 transitions. Second operand 7 states. [2020-10-29 08:56:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:56:21,520 INFO L93 Difference]: Finished difference Result 13770 states and 24480 transitions. [2020-10-29 08:56:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:56:21,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-10-29 08:56:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:56:21,582 INFO L225 Difference]: With dead ends: 13770 [2020-10-29 08:56:21,582 INFO L226 Difference]: Without dead ends: 9153 [2020-10-29 08:56:21,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:56:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9153 states. [2020-10-29 08:56:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9153 to 9023. [2020-10-29 08:56:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9023 states. [2020-10-29 08:56:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9023 states to 9023 states and 15381 transitions. [2020-10-29 08:56:21,924 INFO L78 Accepts]: Start accepts. Automaton has 9023 states and 15381 transitions. Word has length 88 [2020-10-29 08:56:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:56:21,925 INFO L481 AbstractCegarLoop]: Abstraction has 9023 states and 15381 transitions. [2020-10-29 08:56:21,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:56:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9023 states and 15381 transitions. [2020-10-29 08:56:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-29 08:56:21,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:56:21,931 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:56:21,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:56:21,932 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:56:21,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:56:21,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1897581807, now seen corresponding path program 1 times [2020-10-29 08:56:21,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:56:21,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473785816] [2020-10-29 08:56:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:56:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:56:22,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:22,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:22,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:56:22,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-29 08:56:22,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:56:22,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1013 [2020-10-29 08:56:22,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:56:22,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:56:22,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:56:22,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:56:22,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-29 08:56:22,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:56:23,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:56:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:56:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:23,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:56:23,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:56:23,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:56:23,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:56:23,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:56:23,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:56:23,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:56:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:56:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:56:23,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:56:23,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:56:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:56:23,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:23,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:56:23,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-29 08:56:23,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:56:23,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-29 08:56:23,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:56:23,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:56:23,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:56:23,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:56:23,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-29 08:56:23,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:56:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:56:23,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473785816] [2020-10-29 08:56:23,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:56:23,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:56:23,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161354754] [2020-10-29 08:56:23,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:56:23,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:56:23,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:56:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:56:23,784 INFO L87 Difference]: Start difference. First operand 9023 states and 15381 transitions. Second operand 7 states. [2020-10-29 08:57:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:57:13,380 INFO L93 Difference]: Finished difference Result 22625 states and 38534 transitions. [2020-10-29 08:57:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:57:13,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2020-10-29 08:57:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:57:13,450 INFO L225 Difference]: With dead ends: 22625 [2020-10-29 08:57:13,451 INFO L226 Difference]: Without dead ends: 13608 [2020-10-29 08:57:13,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:57:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13608 states. [2020-10-29 08:57:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13608 to 13318. [2020-10-29 08:57:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13318 states. [2020-10-29 08:57:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13318 states to 13318 states and 20694 transitions. [2020-10-29 08:57:13,824 INFO L78 Accepts]: Start accepts. Automaton has 13318 states and 20694 transitions. Word has length 143 [2020-10-29 08:57:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:57:13,825 INFO L481 AbstractCegarLoop]: Abstraction has 13318 states and 20694 transitions. [2020-10-29 08:57:13,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:57:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 13318 states and 20694 transitions. [2020-10-29 08:57:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-29 08:57:13,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:57:13,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:57:13,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:57:13,843 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:57:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:57:13,846 INFO L82 PathProgramCache]: Analyzing trace with hash -947794451, now seen corresponding path program 1 times [2020-10-29 08:57:13,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:57:13,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702155642] [2020-10-29 08:57:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:57:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:13,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:14,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:15,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:15,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:18,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:18,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-29 08:57:18,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:57:18,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4979 [2020-10-29 08:57:18,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:18,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:57:18,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-29 08:57:18,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 08:57:18,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:57:19,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:57:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:19,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:19,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:57:19,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:19,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 08:57:19,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:19,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:19,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:57:19,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:57:19,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:57:19,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:57:19,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:57:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:19,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:19,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:19,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:57:19,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:19,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-29 08:57:19,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:19,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:19,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:57:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:57:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 08:57:19,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:57:19,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-29 08:57:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:19,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:19,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:19,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:57:19,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:19,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-29 08:57:19,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:19,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:57:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:57:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:57:19,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:57:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:57:19,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702155642] [2020-10-29 08:57:19,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:57:19,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:57:19,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121958536] [2020-10-29 08:57:19,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:57:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:57:19,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:57:19,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:57:19,633 INFO L87 Difference]: Start difference. First operand 13318 states and 20694 transitions. Second operand 7 states. [2020-10-29 08:58:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:58:26,783 INFO L93 Difference]: Finished difference Result 35616 states and 56685 transitions. [2020-10-29 08:58:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:58:26,787 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-10-29 08:58:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:58:26,868 INFO L225 Difference]: With dead ends: 35616 [2020-10-29 08:58:26,869 INFO L226 Difference]: Without dead ends: 22304 [2020-10-29 08:58:26,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:58:26,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22304 states. [2020-10-29 08:58:27,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22304 to 22148. [2020-10-29 08:58:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22148 states. [2020-10-29 08:58:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22148 states to 22148 states and 31475 transitions. [2020-10-29 08:58:27,414 INFO L78 Accepts]: Start accepts. Automaton has 22148 states and 31475 transitions. Word has length 203 [2020-10-29 08:58:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:58:27,416 INFO L481 AbstractCegarLoop]: Abstraction has 22148 states and 31475 transitions. [2020-10-29 08:58:27,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:58:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 22148 states and 31475 transitions. [2020-10-29 08:58:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-29 08:58:27,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:58:27,421 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:58:27,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:58:27,421 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:58:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:58:27,422 INFO L82 PathProgramCache]: Analyzing trace with hash 764280848, now seen corresponding path program 1 times [2020-10-29 08:58:27,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:58:27,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615421355] [2020-10-29 08:58:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:58:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:27,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:27,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:29,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:29,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:32,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:32,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-29 08:58:32,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:58:32,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 08:58:32,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:32,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:32,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:58:32,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-29 08:58:32,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 08:58:32,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:58:32,676 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:58:32,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:58:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:32,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:32,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:32,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:58:32,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 08:58:32,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:32,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:58:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:58:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:58:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:58:32,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:58:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:32,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:32,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:32,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 08:58:32,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:32,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-29 08:58:32,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:32,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:58:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:58:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-29 08:58:32,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:58:32,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-29 08:58:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:32,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:33,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:33,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:58:33,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:33,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-29 08:58:33,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:33,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:58:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:58:33,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:58:33,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:58:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:58:33,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615421355] [2020-10-29 08:58:33,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:58:33,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:58:33,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861550344] [2020-10-29 08:58:33,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:58:33,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:58:33,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:58:33,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:58:33,268 INFO L87 Difference]: Start difference. First operand 22148 states and 31475 transitions. Second operand 7 states. [2020-10-29 08:58:33,455 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68