/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:06:18,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:06:18,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:06:18,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:06:18,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:06:18,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:06:18,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:06:18,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:06:18,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:06:18,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:06:18,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:06:18,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:06:18,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:06:18,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:06:18,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:06:18,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:06:18,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:06:18,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:06:18,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:06:18,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:06:18,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:06:18,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:06:18,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:06:18,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:06:18,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:06:18,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:06:18,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:06:18,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:06:18,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:06:18,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:06:18,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:06:18,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:06:18,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:06:18,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:06:18,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:06:18,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:06:18,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:06:18,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:06:18,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:06:18,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:06:18,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:06:18,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:06:18,377 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:06:18,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:06:18,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:06:18,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:06:18,385 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:06:18,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:06:18,386 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:06:18,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:06:18,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:06:18,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:06:18,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:06:18,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:06:18,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:06:18,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:06:18,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:06:18,391 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:06:18,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:06:18,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:06:18,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:06:18,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:06:18,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:06:18,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:06:18,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:06:18,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:06:18,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:06:18,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:06:18,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:06:18,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:06:18,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:06:18,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:06:18,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:06:19,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:06:19,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:06:19,021 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:06:19,022 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:06:19,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label14.c [2020-10-28 14:06:19,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b55a8f838/8d138069e8a44d7ab28e1fb462b975ad/FLAG80cf2b8be [2020-10-28 14:06:20,805 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:06:20,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label14.c [2020-10-28 14:06:20,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b55a8f838/8d138069e8a44d7ab28e1fb462b975ad/FLAG80cf2b8be [2020-10-28 14:06:21,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b55a8f838/8d138069e8a44d7ab28e1fb462b975ad [2020-10-28 14:06:21,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:06:21,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:06:21,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:06:21,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:06:21,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:06:21,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:06:21" (1/1) ... [2020-10-28 14:06:21,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d463e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:21, skipping insertion in model container [2020-10-28 14:06:21,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:06:21" (1/1) ... [2020-10-28 14:06:21,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:06:21,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:06:23,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:06:23,953 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:06:25,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:06:25,535 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:06:25,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25 WrapperNode [2020-10-28 14:06:25,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:06:25,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:06:25,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:06:25,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:06:25,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25" (1/1) ... [2020-10-28 14:06:25,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25" (1/1) ... [2020-10-28 14:06:25,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25" (1/1) ... [2020-10-28 14:06:25,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25" (1/1) ... [2020-10-28 14:06:25,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25" (1/1) ... [2020-10-28 14:06:26,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25" (1/1) ... [2020-10-28 14:06:26,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25" (1/1) ... [2020-10-28 14:06:26,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:06:26,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:06:26,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:06:26,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:06:26,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:06:26,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:06:26,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:06:26,497 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:06:26,497 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:06:26,497 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:06:26,497 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:06:26,498 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:06:26,498 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:06:26,498 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:06:26,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:06:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:06:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:06:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:06:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:06:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:06:26,501 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:06:26,501 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:06:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:06:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:06:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:06:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:06:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:06:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:06:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:06:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:06:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:06:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:06:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:06:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:06:44,047 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:06:44,049 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:06:44,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:06:44 BoogieIcfgContainer [2020-10-28 14:06:44,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:06:44,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:06:44,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:06:44,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:06:44,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:06:21" (1/3) ... [2020-10-28 14:06:44,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596876c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:06:44, skipping insertion in model container [2020-10-28 14:06:44,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:06:25" (2/3) ... [2020-10-28 14:06:44,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596876c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:06:44, skipping insertion in model container [2020-10-28 14:06:44,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:06:44" (3/3) ... [2020-10-28 14:06:44,070 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label14.c [2020-10-28 14:06:44,085 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:06:44,094 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:06:44,111 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:06:44,159 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:06:44,159 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:06:44,159 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:06:44,159 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:06:44,159 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:06:44,160 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:06:44,160 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:06:44,160 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:06:44,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:06:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:06:44,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:06:44,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:06:44,244 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:06:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:06:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash -851326682, now seen corresponding path program 1 times [2020-10-28 14:06:44,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:06:44,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001177370] [2020-10-28 14:06:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:06:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:06:44,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:06:45,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:06:45,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:06:45,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:06:45,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-28 14:06:45,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:06:45,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:06:45,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:06:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:06:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:06:45,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:06:45,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:06:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:06:45,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:06:45,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:06:45,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:06:45,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:06:45,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 14:06:45,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:06:45,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:06:45,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:06:45,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:06:45,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:06:45,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:06:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:06:45,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001177370] [2020-10-28 14:06:45,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:06:45,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:06:45,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566471080] [2020-10-28 14:06:45,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:06:45,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:06:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:06:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:06:45,535 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:07:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:07:17,416 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-28 14:07:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:07:17,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 14:07:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:07:17,483 INFO L225 Difference]: With dead ends: 5100 [2020-10-28 14:07:17,484 INFO L226 Difference]: Without dead ends: 3255 [2020-10-28 14:07:17,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:07:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-28 14:07:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-28 14:07:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-28 14:07:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-28 14:07:17,778 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 19 [2020-10-28 14:07:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:07:17,782 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-28 14:07:17,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:07:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-28 14:07:17,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 14:07:17,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:07:17,796 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:07:17,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:07:17,797 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:07:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:07:17,800 INFO L82 PathProgramCache]: Analyzing trace with hash -160286386, now seen corresponding path program 1 times [2020-10-28 14:07:17,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:07:17,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011414316] [2020-10-28 14:07:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:07:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:07:17,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:18,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:18,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:19,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:19,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 14:07:19,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:07:19,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1874 [2020-10-28 14:07:19,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:19,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:19,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:07:19,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:07:19,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 14:07:19,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:07:19,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:07:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:07:19,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:19,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:19,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:07:19,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:07:19,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 14:07:19,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:19,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:19,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:07:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:07:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:07:19,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:07:20,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:07:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:07:20,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:20,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:20,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:07:20,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:07:20,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-28 14:07:20,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:20,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:20,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:07:20,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:07:20,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:07:20,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:07:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:07:20,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011414316] [2020-10-28 14:07:20,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:07:20,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:07:20,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060695701] [2020-10-28 14:07:20,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:07:20,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:07:20,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:07:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:07:20,478 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-28 14:07:20,644 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:08:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:08:04,998 INFO L93 Difference]: Finished difference Result 9391 states and 15267 transitions. [2020-10-28 14:08:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:08:05,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-28 14:08:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:08:05,038 INFO L225 Difference]: With dead ends: 9391 [2020-10-28 14:08:05,039 INFO L226 Difference]: Without dead ends: 6188 [2020-10-28 14:08:05,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:08:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6188 states. [2020-10-28 14:08:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6188 to 6120. [2020-10-28 14:08:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6120 states. [2020-10-28 14:08:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 8601 transitions. [2020-10-28 14:08:05,246 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 8601 transitions. Word has length 94 [2020-10-28 14:08:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:08:05,247 INFO L481 AbstractCegarLoop]: Abstraction has 6120 states and 8601 transitions. [2020-10-28 14:08:05,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:08:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 8601 transitions. [2020-10-28 14:08:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 14:08:05,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:08:05,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:08:05,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:08:05,251 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:08:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:08:05,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1606337680, now seen corresponding path program 1 times [2020-10-28 14:08:05,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:08:05,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075528712] [2020-10-28 14:08:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:08:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:05,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:05,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:06,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:06,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 14:08:06,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:08:06,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-28 14:08:06,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:06,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:06,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:08:06,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:08:06,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:08:06,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:08:06,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:08:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:06,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:06,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:06,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:08:06,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:08:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:08:06,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:06,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:08:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:08:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:08:06,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:08:06,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:08:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:06,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:07,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:07,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:08:07,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:08:07,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-28 14:08:07,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:07,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:08:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:08:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:08:07,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:08:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:08:07,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075528712] [2020-10-28 14:08:07,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:08:07,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:08:07,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774066774] [2020-10-28 14:08:07,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:08:07,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:08:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:08:07,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:08:07,285 INFO L87 Difference]: Start difference. First operand 6120 states and 8601 transitions. Second operand 7 states. [2020-10-28 14:09:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:09:01,212 INFO L93 Difference]: Finished difference Result 18487 states and 26322 transitions. [2020-10-28 14:09:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:09:01,218 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-10-28 14:09:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:09:01,305 INFO L225 Difference]: With dead ends: 18487 [2020-10-28 14:09:01,306 INFO L226 Difference]: Without dead ends: 12373 [2020-10-28 14:09:01,328 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 [2020-10-28 14:09:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12373 states. [2020-10-28 14:09:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12373 to 12143. [2020-10-28 14:09:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12143 states. [2020-10-28 14:09:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12143 states to 12143 states and 15623 transitions. [2020-10-28 14:09:01,711 INFO L78 Accepts]: Start accepts. Automaton has 12143 states and 15623 transitions. Word has length 120 [2020-10-28 14:09:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:09:01,712 INFO L481 AbstractCegarLoop]: Abstraction has 12143 states and 15623 transitions. [2020-10-28 14:09:01,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:09:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 12143 states and 15623 transitions. [2020-10-28 14:09:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-28 14:09:01,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:09:01,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:09:01,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:09:01,728 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:09:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:09:01,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1568980444, now seen corresponding path program 1 times [2020-10-28 14:09:01,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:09:01,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456561494] [2020-10-28 14:09:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:09:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:01,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:02,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:02,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:03,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:03,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 14:09:03,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:09:03,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1580 [2020-10-28 14:09:03,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:03,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:09:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-28 14:09:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:09:03,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:09:03,502 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:09:03,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:09:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:03,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:03,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:03,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:09:03,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:09:03,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:09:03,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:03,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:03,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:09:03,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:09:03,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:09:03,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:09:03,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:09:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:03,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:03,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:03,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 14:09:03,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:09:03,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 14:09:03,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:03,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:03,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:09:03,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-28 14:09:03,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:09:03,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:09:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:09:03,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456561494] [2020-10-28 14:09:03,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:09:03,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:09:03,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658546210] [2020-10-28 14:09:03,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:09:03,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:09:03,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:09:03,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:09:03,813 INFO L87 Difference]: Start difference. First operand 12143 states and 15623 transitions. Second operand 5 states. [2020-10-28 14:09:03,989 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:10:06,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:10:06,162 INFO L93 Difference]: Finished difference Result 35761 states and 47004 transitions. [2020-10-28 14:10:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:10:06,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-10-28 14:10:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:10:06,328 INFO L225 Difference]: With dead ends: 35761 [2020-10-28 14:10:06,328 INFO L226 Difference]: Without dead ends: 23624 [2020-10-28 14:10:06,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:10:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23624 states. [2020-10-28 14:10:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23624 to 23586. [2020-10-28 14:10:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23586 states. [2020-10-28 14:10:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23586 states to 23586 states and 30368 transitions. [2020-10-28 14:10:07,260 INFO L78 Accepts]: Start accepts. Automaton has 23586 states and 30368 transitions. Word has length 142 [2020-10-28 14:10:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:10:07,262 INFO L481 AbstractCegarLoop]: Abstraction has 23586 states and 30368 transitions. [2020-10-28 14:10:07,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:10:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 23586 states and 30368 transitions. [2020-10-28 14:10:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-28 14:10:07,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:10:07,272 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:10:07,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:10:07,273 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:10:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:10:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1355636176, now seen corresponding path program 1 times [2020-10-28 14:10:07,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:10:07,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049043927] [2020-10-28 14:10:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:10:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:07,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:07,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:08,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:12,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:12,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 14:10:12,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:10:12,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 14:10:12,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:12,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:10:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:10:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-28 14:10:12,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:10:12,622 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:10:12,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:10:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:12,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:12,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:12,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:10:12,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:10:12,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 14:10:12,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:12,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:12,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:10:12,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:10:12,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:10:12,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:10:12,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:10:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:12,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:12,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:12,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 14:10:12,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:10:12,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-28 14:10:12,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:12,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:12,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:10:12,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:10:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 14:10:13,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:10:13,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-28 14:10:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:13,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:13,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:13,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 14:10:13,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:10:13,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 14:10:13,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:13,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:13,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:10:13,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 14:10:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:10:13,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:10:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:10:13,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049043927] [2020-10-28 14:10:13,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:10:13,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:10:13,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172371891] [2020-10-28 14:10:13,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:10:13,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:10:13,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:10:13,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:10:13,417 INFO L87 Difference]: Start difference. First operand 23586 states and 30368 transitions. Second operand 7 states. [2020-10-28 14:10:13,683 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 68