/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/Problem13_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:41:17,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:41:17,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:41:17,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:41:17,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:41:17,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:41:17,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:41:17,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:41:17,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:41:17,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:41:17,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:41:17,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:41:17,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:41:17,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:41:17,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:41:17,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:41:17,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:41:17,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:41:17,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:41:17,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:41:17,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:41:17,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:41:17,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:41:17,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:41:17,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:41:17,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:41:17,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:41:17,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:41:17,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:41:17,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:41:17,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:41:17,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:41:17,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:41:17,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:41:17,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:41:17,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:41:17,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:41:17,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:41:17,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:41:17,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:41:17,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:41:17,423 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 12:41:17,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:41:17,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:41:17,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:41:17,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:41:17,453 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:41:17,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:41:17,453 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:41:17,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:41:17,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:41:17,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:41:17,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:41:17,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:41:17,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:41:17,455 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:41:17,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:41:17,455 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:41:17,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:41:17,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:41:17,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:41:17,456 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:41:17,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:41:17,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:41:17,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:41:17,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:41:17,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:41:17,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:41:17,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:41:17,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:41:17,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:41:17,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:41:17,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:41:17,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:41:17,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:41:17,914 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:41:17,915 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:41:17,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label47.c [2020-10-28 12:41:17,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a760a5f98/8ab90905cae94fef8fc3dc2ea8cdfc2a/FLAGbb0a26d1d [2020-10-28 12:41:19,170 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:41:19,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label47.c [2020-10-28 12:41:19,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a760a5f98/8ab90905cae94fef8fc3dc2ea8cdfc2a/FLAGbb0a26d1d [2020-10-28 12:41:19,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a760a5f98/8ab90905cae94fef8fc3dc2ea8cdfc2a [2020-10-28 12:41:19,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:41:19,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:41:19,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:41:19,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:41:19,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:41:19,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:41:19" (1/1) ... [2020-10-28 12:41:19,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee9b29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:19, skipping insertion in model container [2020-10-28 12:41:19,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:41:19" (1/1) ... [2020-10-28 12:41:19,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:41:19,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:41:21,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:41:21,381 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:41:22,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:41:22,175 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:41:22,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22 WrapperNode [2020-10-28 12:41:22,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:41:22,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:41:22,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:41:22,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:41:22,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22" (1/1) ... [2020-10-28 12:41:22,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22" (1/1) ... [2020-10-28 12:41:22,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22" (1/1) ... [2020-10-28 12:41:22,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22" (1/1) ... [2020-10-28 12:41:22,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22" (1/1) ... [2020-10-28 12:41:22,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22" (1/1) ... [2020-10-28 12:41:22,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22" (1/1) ... [2020-10-28 12:41:22,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:41:22,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:41:22,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:41:22,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:41:22,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22" (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 12:41:22,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:41:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:41:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:41:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:41:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:41:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:41:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:41:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:41:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:41:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:41:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:41:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:41:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:41:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:41:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:41:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:41:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:41:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:41:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:41:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:41:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:41:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:41:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:41:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:41:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:41:31,910 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:41:31,910 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:41:31,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:41:31 BoogieIcfgContainer [2020-10-28 12:41:31,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:41:31,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:41:31,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:41:31,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:41:31,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:41:19" (1/3) ... [2020-10-28 12:41:31,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268985de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:41:31, skipping insertion in model container [2020-10-28 12:41:31,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:22" (2/3) ... [2020-10-28 12:41:31,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268985de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:41:31, skipping insertion in model container [2020-10-28 12:41:31,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:41:31" (3/3) ... [2020-10-28 12:41:31,932 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label47.c [2020-10-28 12:41:31,945 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:41:31,951 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:41:31,966 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:41:32,017 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:41:32,017 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:41:32,017 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:41:32,017 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:41:32,018 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:41:32,018 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:41:32,018 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:41:32,018 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:41:32,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-28 12:41:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 12:41:32,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:41:32,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:41:32,065 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:41:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:41:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1484263914, now seen corresponding path program 1 times [2020-10-28 12:41:32,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:41:32,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379799170] [2020-10-28 12:41:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:41:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:32,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:32,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:32,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 12:41:32,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:32,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-28 12:41:32,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:32,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:32,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:41:32,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:41:32,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 12:41:32,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:41:33,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:41:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:33,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:33,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:33,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:41:33,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:33,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 12:41:33,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:33,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:33,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:41:33,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:33,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:41:33,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:41:33,086 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 12:41:33,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379799170] [2020-10-28 12:41:33,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:41:33,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:41:33,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459235885] [2020-10-28 12:41:33,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:41:33,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:41:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:41:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:41:33,118 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-28 12:41:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:41:51,604 INFO L93 Difference]: Finished difference Result 3234 states and 5914 transitions. [2020-10-28 12:41:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:41:51,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 12:41:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:41:51,649 INFO L225 Difference]: With dead ends: 3234 [2020-10-28 12:41:51,650 INFO L226 Difference]: Without dead ends: 2026 [2020-10-28 12:41:51,666 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 12:41:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2020-10-28 12:41:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2008. [2020-10-28 12:41:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2008 states. [2020-10-28 12:41:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 3289 transitions. [2020-10-28 12:41:51,869 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 3289 transitions. Word has length 50 [2020-10-28 12:41:51,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:41:51,870 INFO L481 AbstractCegarLoop]: Abstraction has 2008 states and 3289 transitions. [2020-10-28 12:41:51,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:41:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 3289 transitions. [2020-10-28 12:41:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 12:41:51,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:41:51,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:41:51,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:41:51,890 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:41:51,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:41:51,892 INFO L82 PathProgramCache]: Analyzing trace with hash -322601054, now seen corresponding path program 1 times [2020-10-28 12:41:51,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:41:51,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554254296] [2020-10-28 12:41:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:41:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:52,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:53,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:54,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:54,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 12:41:54,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:41:54,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2363 [2020-10-28 12:41:54,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:54,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:54,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:41:54,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:41:54,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 12:41:54,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:41:54,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:41:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:54,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:54,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:54,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:41:54,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:54,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 12:41:54,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:54,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:54,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:41:54,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:41:54,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 12:41:54,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:41:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:54,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:54,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:54,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:41:54,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:54,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-28 12:41:54,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:54,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:41:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:41:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:41:54,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:41:54,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554254296] [2020-10-28 12:41:54,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:41:54,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:41:54,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925044423] [2020-10-28 12:41:54,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:41:54,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:41:54,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:41:54,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:41:54,863 INFO L87 Difference]: Start difference. First operand 2008 states and 3289 transitions. Second operand 7 states. [2020-10-28 12:41:56,488 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:42:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:42:18,058 INFO L93 Difference]: Finished difference Result 5863 states and 9698 transitions. [2020-10-28 12:42:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:42:18,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-10-28 12:42:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:42:18,088 INFO L225 Difference]: With dead ends: 5863 [2020-10-28 12:42:18,089 INFO L226 Difference]: Without dead ends: 3861 [2020-10-28 12:42:18,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:42:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2020-10-28 12:42:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3759. [2020-10-28 12:42:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3759 states. [2020-10-28 12:42:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5629 transitions. [2020-10-28 12:42:18,243 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5629 transitions. Word has length 125 [2020-10-28 12:42:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:42:18,245 INFO L481 AbstractCegarLoop]: Abstraction has 3759 states and 5629 transitions. [2020-10-28 12:42:18,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:42:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5629 transitions. [2020-10-28 12:42:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 12:42:18,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:42:18,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:42:18,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:42:18,250 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:42:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:42:18,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1320299878, now seen corresponding path program 1 times [2020-10-28 12:42:18,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:42:18,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338179523] [2020-10-28 12:42:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:42:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:18,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:18,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:19,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:19,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-28 12:42:19,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:42:19,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-28 12:42:19,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:19,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:19,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:42:19,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:42:19,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:42:19,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 12:42:19,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:42:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:19,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:19,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:19,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:42:19,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:19,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 12:42:19,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:19,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:42:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:42:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:42:19,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:42:19,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:42:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:19,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:19,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:19,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:42:19,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:19,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-28 12:42:19,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:19,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:42:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:42:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 12:42:19,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:42:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:42:19,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338179523] [2020-10-28 12:42:19,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:42:19,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:42:19,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063635052] [2020-10-28 12:42:19,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:42:19,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:42:19,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:42:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:42:19,743 INFO L87 Difference]: Start difference. First operand 3759 states and 5629 transitions. Second operand 7 states. [2020-10-28 12:42:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:42:42,455 INFO L93 Difference]: Finished difference Result 11271 states and 17302 transitions. [2020-10-28 12:42:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:42:42,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-10-28 12:42:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:42:42,499 INFO L225 Difference]: With dead ends: 11271 [2020-10-28 12:42:42,500 INFO L226 Difference]: Without dead ends: 7518 [2020-10-28 12:42:42,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:42:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7518 states. [2020-10-28 12:42:42,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7518 to 7320. [2020-10-28 12:42:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7320 states. [2020-10-28 12:42:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7320 states to 7320 states and 9910 transitions. [2020-10-28 12:42:42,731 INFO L78 Accepts]: Start accepts. Automaton has 7320 states and 9910 transitions. Word has length 139 [2020-10-28 12:42:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:42:42,732 INFO L481 AbstractCegarLoop]: Abstraction has 7320 states and 9910 transitions. [2020-10-28 12:42:42,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:42:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 7320 states and 9910 transitions. [2020-10-28 12:42:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-28 12:42:42,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:42:42,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:42:42,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:42:42,735 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:42:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:42:42,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1590990590, now seen corresponding path program 1 times [2020-10-28 12:42:42,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:42:42,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847970516] [2020-10-28 12:42:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:42:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:42,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:43,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:44,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:44,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-28 12:42:44,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:42:44,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1583 [2020-10-28 12:42:44,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:44,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:44,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:42:44,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:42:44,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 12:42:44,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:42:44,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:42:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:44,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:44,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:44,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:42:44,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:44,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 12:42:44,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:44,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:42:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:42:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:42:44,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:42:44,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:42:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:44,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:44,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:44,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 12:42:44,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:44,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-28 12:42:44,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:44,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:44,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:42:44,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:42:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-28 12:42:44,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:42:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:42:45,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847970516] [2020-10-28 12:42:45,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:42:45,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:42:45,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894758685] [2020-10-28 12:42:45,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:42:45,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:42:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:42:45,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:42:45,015 INFO L87 Difference]: Start difference. First operand 7320 states and 9910 transitions. Second operand 7 states. [2020-10-28 12:43:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:43:04,660 INFO L93 Difference]: Finished difference Result 21841 states and 30589 transitions. [2020-10-28 12:43:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:43:04,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 168 [2020-10-28 12:43:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:43:04,737 INFO L225 Difference]: With dead ends: 21841 [2020-10-28 12:43:04,738 INFO L226 Difference]: Without dead ends: 14527 [2020-10-28 12:43:04,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:43:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14527 states. [2020-10-28 12:43:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14527 to 14402. [2020-10-28 12:43:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14402 states. [2020-10-28 12:43:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 18507 transitions. [2020-10-28 12:43:05,269 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 18507 transitions. Word has length 168 [2020-10-28 12:43:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:43:05,270 INFO L481 AbstractCegarLoop]: Abstraction has 14402 states and 18507 transitions. [2020-10-28 12:43:05,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:43:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 18507 transitions. [2020-10-28 12:43:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-28 12:43:05,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:43:05,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 12:43:05,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:43:05,280 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:43:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:43:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1084479442, now seen corresponding path program 1 times [2020-10-28 12:43:05,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:43:05,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480171542] [2020-10-28 12:43:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:43:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:05,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:05,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:05,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:10,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:10,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-28 12:43:10,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:43:10,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 12:43:10,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:10,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:10,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:43:10,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-28 12:43:10,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 12:43:10,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:43:10,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:43:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:10,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:10,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:43:10,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:10,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:43:10,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:10,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:10,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:43:10,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:43:10,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:43:10,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:10,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:43:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:10,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:10,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:10,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 12:43:10,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:10,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-28 12:43:10,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:10,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:10,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:43:10,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:43:10,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 12:43:10,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:10,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 12:43:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:10,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:10,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:10,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 12:43:11,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:11,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-28 12:43:11,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:11,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:11,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:43:11,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:43:11,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 12:43:11,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 174 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:43:11,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480171542] [2020-10-28 12:43:11,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:43:11,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:43:11,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411564625] [2020-10-28 12:43:11,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:43:11,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:43:11,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:43:11,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:43:11,175 INFO L87 Difference]: Start difference. First operand 14402 states and 18507 transitions. Second operand 7 states. [2020-10-28 12:43:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:43:36,184 INFO L93 Difference]: Finished difference Result 43106 states and 59140 transitions. [2020-10-28 12:43:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:43:36,186 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2020-10-28 12:43:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:43:36,330 INFO L225 Difference]: With dead ends: 43106 [2020-10-28 12:43:36,330 INFO L226 Difference]: Without dead ends: 28710 [2020-10-28 12:43:36,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:43:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28710 states. [2020-10-28 12:43:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28710 to 28334. [2020-10-28 12:43:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28334 states. [2020-10-28 12:43:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28334 states to 28334 states and 38118 transitions. [2020-10-28 12:43:37,429 INFO L78 Accepts]: Start accepts. Automaton has 28334 states and 38118 transitions. Word has length 250 [2020-10-28 12:43:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:43:37,430 INFO L481 AbstractCegarLoop]: Abstraction has 28334 states and 38118 transitions. [2020-10-28 12:43:37,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:43:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 28334 states and 38118 transitions. [2020-10-28 12:43:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-28 12:43:37,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:43:37,442 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:43:37,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:43:37,443 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:43:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:43:37,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1588613726, now seen corresponding path program 1 times [2020-10-28 12:43:37,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:43:37,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909772997] [2020-10-28 12:43:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:43:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:37,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:39,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:40,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:42,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:42,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-28 12:43:42,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 12:43:42,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4873 [2020-10-28 12:43:42,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:42,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:42,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:43:42,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-28 12:43:42,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:43:42,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:42,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:43:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:42,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:42,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:42,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:43:42,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:42,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:43:42,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:42,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:42,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:43:42,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:43:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:43:42,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:42,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:43:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:42,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:42,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:42,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 12:43:42,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:42,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 12:43:42,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:42,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:42,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:43:42,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-28 12:43:42,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:43:42,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:42,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-28 12:43:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:42,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:42,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:42,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 12:43:42,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:42,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 12:43:42,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:42,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:43:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-28 12:43:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:43:42,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-28 12:43:43,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909772997] [2020-10-28 12:43:43,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:43:43,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:43:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054418241] [2020-10-28 12:43:43,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:43:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:43:43,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:43:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:43:43,102 INFO L87 Difference]: Start difference. First operand 28334 states and 38118 transitions. Second operand 5 states. [2020-10-28 12:43:44,057 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-28 12:44:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:44:13,160 INFO L93 Difference]: Finished difference Result 77878 states and 108526 transitions. [2020-10-28 12:44:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:44:13,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-10-28 12:44:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:44:13,352 INFO L225 Difference]: With dead ends: 77878 [2020-10-28 12:44:13,352 INFO L226 Difference]: Without dead ends: 49550 [2020-10-28 12:44:13,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:44:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49550 states. [2020-10-28 12:44:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49550 to 44599. [2020-10-28 12:44:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44599 states. [2020-10-28 12:44:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44599 states to 44599 states and 59230 transitions. [2020-10-28 12:44:14,805 INFO L78 Accepts]: Start accepts. Automaton has 44599 states and 59230 transitions. Word has length 311 [2020-10-28 12:44:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:44:15,139 INFO L481 AbstractCegarLoop]: Abstraction has 44599 states and 59230 transitions. [2020-10-28 12:44:15,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:44:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 44599 states and 59230 transitions. [2020-10-28 12:44:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-28 12:44:15,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:44:15,174 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 12:44:15,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:44:15,174 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:44:15,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:44:15,175 INFO L82 PathProgramCache]: Analyzing trace with hash -398651241, now seen corresponding path program 1 times [2020-10-28 12:44:15,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:44:15,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720542635] [2020-10-28 12:44:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:44:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:44:15,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:15,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:15,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:16,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:18,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:20,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:44:20,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 378 [2020-10-28 12:44:20,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 12:44:20,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 12:44:20,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:44:20,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:44:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:44:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-28 12:44:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 12:44:20,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:44:20,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:44:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:44:20,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:20,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:44:20,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:44:20,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:44:20,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 12:44:20,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:44:20,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:44:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:44:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:44:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:44:20,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:44:20,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:44:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:44:20,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:20,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:44:20,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 12:44:20,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:44:20,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 12:44:20,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:44:20,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:44:20,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:44:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:44:20,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 12:44:20,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 12:44:20,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-28 12:44:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:44:20,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:20,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:21,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:44:21,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:44:21,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:44:21,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-28 12:44:21,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:44:21,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:44:21,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:44:21,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:44:21,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 12:44:21,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:44:21,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-10-28 12:44:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:44:21,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:44:21,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:44:21,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 12:44:21,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:44:21,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 12:44:21,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:44:21,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:44:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:44:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:44:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 12:44:21,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:44:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 312 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-28 12:44:21,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720542635] [2020-10-28 12:44:21,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:44:21,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 12:44:21,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787369656] [2020-10-28 12:44:21,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:44:21,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:44:21,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:44:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:44:21,598 INFO L87 Difference]: Start difference. First operand 44599 states and 59230 transitions. Second operand 8 states. [2020-10-28 12:45:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:45:00,071 INFO L93 Difference]: Finished difference Result 107175 states and 144974 transitions. [2020-10-28 12:45:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:45:00,075 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 362 [2020-10-28 12:45:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:45:00,330 INFO L225 Difference]: With dead ends: 107175 [2020-10-28 12:45:00,330 INFO L226 Difference]: Without dead ends: 63385 [2020-10-28 12:45:00,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 12:45:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63385 states. [2020-10-28 12:45:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63385 to 63329. [2020-10-28 12:45:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63329 states. [2020-10-28 12:45:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63329 states to 63329 states and 82502 transitions. [2020-10-28 12:45:02,851 INFO L78 Accepts]: Start accepts. Automaton has 63329 states and 82502 transitions. Word has length 362 [2020-10-28 12:45:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:45:02,852 INFO L481 AbstractCegarLoop]: Abstraction has 63329 states and 82502 transitions. [2020-10-28 12:45:02,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:45:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63329 states and 82502 transitions. [2020-10-28 12:45:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-28 12:45:02,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:45:02,880 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:02,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:45:02,881 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:45:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:45:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1694904545, now seen corresponding path program 1 times [2020-10-28 12:45:02,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:45:02,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431549188] [2020-10-28 12:45:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:45:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:45:03,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:45:03,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:45:03,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:45:07,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking...