/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 21:21:56,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 21:21:56,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 21:21:56,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 21:21:56,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 21:21:56,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 21:21:56,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 21:21:56,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 21:21:56,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 21:21:56,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 21:21:56,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 21:21:56,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 21:21:56,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 21:21:56,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 21:21:56,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 21:21:56,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 21:21:56,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 21:21:56,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 21:21:57,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 21:21:57,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 21:21:57,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 21:21:57,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 21:21:57,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 21:21:57,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 21:21:57,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 21:21:57,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 21:21:57,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 21:21:57,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 21:21:57,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 21:21:57,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 21:21:57,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 21:21:57,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 21:21:57,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 21:21:57,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 21:21:57,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 21:21:57,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 21:21:57,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 21:21:57,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 21:21:57,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 21:21:57,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 21:21:57,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 21:21:57,051 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 [2020-10-14 21:21:57,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 21:21:57,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 21:21:57,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 21:21:57,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 21:21:57,098 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 21:21:57,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 21:21:57,098 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 21:21:57,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 21:21:57,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 21:21:57,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 21:21:57,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 21:21:57,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 21:21:57,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 21:21:57,101 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 21:21:57,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 21:21:57,101 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 21:21:57,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 21:21:57,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 21:21:57,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 21:21:57,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 21:21:57,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 21:21:57,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 21:21:57,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 21:21:57,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 21:21:57,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 21:21:57,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 21:21:57,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 21:21:57,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 21:21:57,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 21:21:57,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 21:21:57,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 21:21:57,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 21:21:57,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 21:21:57,462 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 21:21:57,463 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 21:21:57,464 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label03.c [2020-10-14 21:21:57,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/beb61386f/08aa4edd22ee409fbb1b648803674dbf/FLAG6aa8ee7c5 [2020-10-14 21:21:58,467 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 21:21:58,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label03.c [2020-10-14 21:21:58,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/beb61386f/08aa4edd22ee409fbb1b648803674dbf/FLAG6aa8ee7c5 [2020-10-14 21:21:58,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/beb61386f/08aa4edd22ee409fbb1b648803674dbf [2020-10-14 21:21:58,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 21:21:58,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 21:21:58,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 21:21:58,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 21:21:58,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 21:21:58,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:21:58" (1/1) ... [2020-10-14 21:21:58,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e64c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:21:58, skipping insertion in model container [2020-10-14 21:21:58,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:21:58" (1/1) ... [2020-10-14 21:21:58,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 21:21:59,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 21:22:01,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:22:01,151 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 21:22:02,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:22:02,127 INFO L208 MainTranslator]: Completed translation [2020-10-14 21:22:02,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02 WrapperNode [2020-10-14 21:22:02,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 21:22:02,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 21:22:02,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 21:22:02,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 21:22:02,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02" (1/1) ... [2020-10-14 21:22:02,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02" (1/1) ... [2020-10-14 21:22:02,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02" (1/1) ... [2020-10-14 21:22:02,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02" (1/1) ... [2020-10-14 21:22:02,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02" (1/1) ... [2020-10-14 21:22:02,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02" (1/1) ... [2020-10-14 21:22:02,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02" (1/1) ... [2020-10-14 21:22:02,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 21:22:02,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 21:22:02,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 21:22:02,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 21:22:02,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02" (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 [2020-10-14 21:22:02,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 21:22:02,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 21:22:02,674 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 21:22:02,675 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 21:22:02,675 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 21:22:02,675 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 21:22:02,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 21:22:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 21:22:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 21:22:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 21:22:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 21:22:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 21:22:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 21:22:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 21:22:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 21:22:02,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 21:22:02,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 21:22:15,407 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 21:22:15,408 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 21:22:15,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:22:15 BoogieIcfgContainer [2020-10-14 21:22:15,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 21:22:15,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 21:22:15,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 21:22:15,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 21:22:15,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:21:58" (1/3) ... [2020-10-14 21:22:15,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1149fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:22:15, skipping insertion in model container [2020-10-14 21:22:15,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:22:02" (2/3) ... [2020-10-14 21:22:15,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1149fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:22:15, skipping insertion in model container [2020-10-14 21:22:15,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:22:15" (3/3) ... [2020-10-14 21:22:15,454 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label03.c [2020-10-14 21:22:15,472 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 21:22:15,497 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 21:22:15,521 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 21:22:15,578 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 21:22:15,579 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 21:22:15,579 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 21:22:15,579 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 21:22:15,580 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 21:22:15,580 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 21:22:15,580 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 21:22:15,580 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 21:22:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-14 21:22:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 21:22:15,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:22:15,670 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] [2020-10-14 21:22:15,671 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:22:15,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:22:15,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1631378225, now seen corresponding path program 1 times [2020-10-14 21:22:15,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:22:15,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960362203] [2020-10-14 21:22:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:22:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:22:16,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:22:16,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:22:16,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 21:22:16,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:22:16,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-14 21:22:16,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:22:16,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:22:16,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:22:16,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:22:16,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 21:22:16,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 21:22:16,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:22:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:22:16,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:22:16,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:22:16,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:22:16,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:22:16,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 21:22:16,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:22:16,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:22:16,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:22:16,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:22:16,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:22:16,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:22:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:22:16,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960362203] [2020-10-14 21:22:16,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:22:16,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 21:22:16,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146948561] [2020-10-14 21:22:16,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 21:22:16,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:22:16,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 21:22:16,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 21:22:16,681 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-14 21:22:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:22:32,178 INFO L93 Difference]: Finished difference Result 3243 states and 5948 transitions. [2020-10-14 21:22:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:22:32,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-14 21:22:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:22:32,229 INFO L225 Difference]: With dead ends: 3243 [2020-10-14 21:22:32,229 INFO L226 Difference]: Without dead ends: 2045 [2020-10-14 21:22:32,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 21:22:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-10-14 21:22:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1988. [2020-10-14 21:22:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1988 states. [2020-10-14 21:22:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3533 transitions. [2020-10-14 21:22:32,425 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3533 transitions. Word has length 40 [2020-10-14 21:22:32,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:22:32,427 INFO L479 AbstractCegarLoop]: Abstraction has 1988 states and 3533 transitions. [2020-10-14 21:22:32,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 21:22:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3533 transitions. [2020-10-14 21:22:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 21:22:32,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:22:32,437 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:22:32,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 21:22:32,438 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:22:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:22:32,439 INFO L82 PathProgramCache]: Analyzing trace with hash -398628649, now seen corresponding path program 1 times [2020-10-14 21:22:32,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:22:32,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918684868] [2020-10-14 21:22:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:22:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:22:32,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:22:32,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:22:33,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:22:34,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:22:34,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 21:22:34,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:22:34,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1662 [2020-10-14 21:22:34,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:22:34,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:22:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:22:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:22:34,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 21:22:34,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 21:22:34,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:22:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:22:34,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:22:34,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:22:34,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:22:34,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:22:34,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 21:22:34,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:22:34,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:22:34,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:22:34,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:22:34,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:22:34,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:22:34,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:22:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:22:34,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:22:34,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:22:34,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 21:22:34,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:22:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-14 21:22:34,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:22:34,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:22:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:22:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:22:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 21:22:34,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:22:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:22:34,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918684868] [2020-10-14 21:22:34,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:22:34,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 21:22:34,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539358809] [2020-10-14 21:22:34,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 21:22:34,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:22:34,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 21:22:34,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 21:22:34,599 INFO L87 Difference]: Start difference. First operand 1988 states and 3533 transitions. Second operand 8 states. [2020-10-14 21:23:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:23:07,527 INFO L93 Difference]: Finished difference Result 7338 states and 13417 transitions. [2020-10-14 21:23:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 21:23:07,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-10-14 21:23:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:23:07,562 INFO L225 Difference]: With dead ends: 7338 [2020-10-14 21:23:07,562 INFO L226 Difference]: Without dead ends: 5356 [2020-10-14 21:23:07,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-14 21:23:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2020-10-14 21:23:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 5331. [2020-10-14 21:23:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5331 states. [2020-10-14 21:23:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 8095 transitions. [2020-10-14 21:23:07,757 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 8095 transitions. Word has length 109 [2020-10-14 21:23:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:23:07,759 INFO L479 AbstractCegarLoop]: Abstraction has 5331 states and 8095 transitions. [2020-10-14 21:23:07,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 21:23:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 8095 transitions. [2020-10-14 21:23:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 21:23:07,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:23:07,771 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:23:07,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 21:23:07,772 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:23:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:23:07,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1980938507, now seen corresponding path program 1 times [2020-10-14 21:23:07,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:23:07,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026689402] [2020-10-14 21:23:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:23:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:23:07,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:23:08,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:23:08,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:23:09,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:23:09,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-14 21:23:09,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:23:09,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1501 [2020-10-14 21:23:09,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:23:09,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:23:09,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:23:09,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:23:09,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 21:23:09,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:23:09,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:23:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:23:09,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:23:09,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:23:09,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:23:09,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:23:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 21:23:09,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:23:09,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:23:09,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:23:09,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:23:09,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:23:09,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:23:09,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:23:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:23:09,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:23:09,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:23:09,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 21:23:09,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:23:09,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-14 21:23:09,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:23:09,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:23:09,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:23:09,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:23:09,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 21:23:09,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:23:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:23:09,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026689402] [2020-10-14 21:23:09,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:23:09,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:23:09,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638916956] [2020-10-14 21:23:09,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:23:09,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:23:09,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:23:09,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:23:09,818 INFO L87 Difference]: Start difference. First operand 5331 states and 8095 transitions. Second operand 7 states. [2020-10-14 21:23:40,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:23:40,148 INFO L93 Difference]: Finished difference Result 16024 states and 25158 transitions. [2020-10-14 21:23:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:23:40,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2020-10-14 21:23:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:23:40,211 INFO L225 Difference]: With dead ends: 16024 [2020-10-14 21:23:40,211 INFO L226 Difference]: Without dead ends: 10699 [2020-10-14 21:23:40,231 INFO L675 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 [2020-10-14 21:23:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10699 states. [2020-10-14 21:23:40,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10699 to 10504. [2020-10-14 21:23:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10504 states. [2020-10-14 21:23:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10504 states to 10504 states and 14861 transitions. [2020-10-14 21:23:40,594 INFO L78 Accepts]: Start accepts. Automaton has 10504 states and 14861 transitions. Word has length 115 [2020-10-14 21:23:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:23:40,603 INFO L479 AbstractCegarLoop]: Abstraction has 10504 states and 14861 transitions. [2020-10-14 21:23:40,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:23:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 10504 states and 14861 transitions. [2020-10-14 21:23:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-14 21:23:40,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:23:40,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:23:40,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 21:23:40,606 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:23:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:23:40,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1620335089, now seen corresponding path program 1 times [2020-10-14 21:23:40,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:23:40,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321466407] [2020-10-14 21:23:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:23:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:23:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:23:40,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:23:41,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:23:41,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-14 21:23:41,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:23:41,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-14 21:23:41,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:23:41,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:23:41,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:23:41,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:23:41,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-14 21:23:41,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 21:23:42,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:23:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:23:42,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:23:42,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:23:42,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:23:42,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:23:42,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 21:23:42,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:23:42,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:23:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:23:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:23:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:23:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:23:42,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:23:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:23:42,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:23:42,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:23:42,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 21:23:42,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:23:42,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-14 21:23:42,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:23:42,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:23:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:23:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:23:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 21:23:42,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:23:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:23:42,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321466407] [2020-10-14 21:23:42,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:23:42,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:23:42,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730800964] [2020-10-14 21:23:42,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:23:42,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:23:42,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:23:42,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:23:42,511 INFO L87 Difference]: Start difference. First operand 10504 states and 14861 transitions. Second operand 7 states. [2020-10-14 21:24:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:24:10,913 INFO L93 Difference]: Finished difference Result 22518 states and 33740 transitions. [2020-10-14 21:24:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 21:24:10,917 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2020-10-14 21:24:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:24:10,991 INFO L225 Difference]: With dead ends: 22518 [2020-10-14 21:24:10,992 INFO L226 Difference]: Without dead ends: 12020 [2020-10-14 21:24:11,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-14 21:24:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2020-10-14 21:24:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 11445. [2020-10-14 21:24:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11445 states. [2020-10-14 21:24:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11445 states to 11445 states and 16055 transitions. [2020-10-14 21:24:11,504 INFO L78 Accepts]: Start accepts. Automaton has 11445 states and 16055 transitions. Word has length 145 [2020-10-14 21:24:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:24:11,506 INFO L479 AbstractCegarLoop]: Abstraction has 11445 states and 16055 transitions. [2020-10-14 21:24:11,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:24:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 11445 states and 16055 transitions. [2020-10-14 21:24:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-14 21:24:11,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:24:11,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:24:11,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 21:24:11,511 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:24:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:24:11,511 INFO L82 PathProgramCache]: Analyzing trace with hash -820048069, now seen corresponding path program 1 times [2020-10-14 21:24:11,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:24:11,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796347126] [2020-10-14 21:24:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:24:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:24:11,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:24:11,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:24:12,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:24:12,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 21:24:12,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:24:12,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1402 [2020-10-14 21:24:12,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:24:12,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:24:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:24:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:24:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-14 21:24:12,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:24:13,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:24:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:24:13,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:24:13,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:24:13,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:24:13,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:24:13,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 21:24:13,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:24:13,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:24:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:24:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:24:13,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:24:13,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:24:13,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:24:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:24:13,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:24:13,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:24:13,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 21:24:13,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:24:13,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-14 21:24:13,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:24:13,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:24:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:24:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:24:13,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-14 21:24:13,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:24:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:24:13,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796347126] [2020-10-14 21:24:13,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:24:13,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 21:24:13,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831940383] [2020-10-14 21:24:13,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 21:24:13,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:24:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 21:24:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 21:24:13,602 INFO L87 Difference]: Start difference. First operand 11445 states and 16055 transitions. Second operand 8 states. [2020-10-14 21:24:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:24:41,940 INFO L93 Difference]: Finished difference Result 22433 states and 32138 transitions. [2020-10-14 21:24:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 21:24:41,943 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 155 [2020-10-14 21:24:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:24:41,994 INFO L225 Difference]: With dead ends: 22433 [2020-10-14 21:24:41,995 INFO L226 Difference]: Without dead ends: 11797 [2020-10-14 21:24:42,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-14 21:24:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11797 states. [2020-10-14 21:24:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11797 to 11441. [2020-10-14 21:24:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11441 states. [2020-10-14 21:24:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11441 states to 11441 states and 15963 transitions. [2020-10-14 21:24:42,440 INFO L78 Accepts]: Start accepts. Automaton has 11441 states and 15963 transitions. Word has length 155 [2020-10-14 21:24:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:24:42,440 INFO L479 AbstractCegarLoop]: Abstraction has 11441 states and 15963 transitions. [2020-10-14 21:24:42,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 21:24:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 11441 states and 15963 transitions. [2020-10-14 21:24:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-14 21:24:42,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:24:42,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:24:42,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 21:24:42,445 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:24:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:24:42,445 INFO L82 PathProgramCache]: Analyzing trace with hash -130747528, now seen corresponding path program 1 times [2020-10-14 21:24:42,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:24:42,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620509308] [2020-10-14 21:24:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:24:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:24:42,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:24:42,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:24:43,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:24:43,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-14 21:24:43,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:24:43,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-14 21:24:43,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:24:43,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:24:43,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 21:24:43,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:24:43,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-14 21:24:43,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:24:43,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:24:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:24:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:24:43,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:24:43,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:24:43,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:24:43,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 21:24:43,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:24:43,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:24:43,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:24:43,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:24:43,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:24:43,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:24:43,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:24:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:24:43,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:24:43,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:24:43,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:24:43,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 21:24:43,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:24:43,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-14 21:24:43,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:24:43,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:24:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:24:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:24:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 21:24:43,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:24:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 21:24:43,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620509308] [2020-10-14 21:24:43,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:24:43,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 21:24:43,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580450277] [2020-10-14 21:24:43,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 21:24:43,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:24:43,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 21:24:43,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 21:24:43,916 INFO L87 Difference]: Start difference. First operand 11441 states and 15963 transitions. Second operand 6 states. [2020-10-14 21:25:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:25:18,125 INFO L93 Difference]: Finished difference Result 30460 states and 44721 transitions. [2020-10-14 21:25:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:25:18,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2020-10-14 21:25:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:25:18,215 INFO L225 Difference]: With dead ends: 30460 [2020-10-14 21:25:18,216 INFO L226 Difference]: Without dead ends: 19828 [2020-10-14 21:25:18,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:25:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19828 states. [2020-10-14 21:25:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19828 to 19788. [2020-10-14 21:25:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19788 states. [2020-10-14 21:25:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19788 states to 19788 states and 26309 transitions. [2020-10-14 21:25:18,744 INFO L78 Accepts]: Start accepts. Automaton has 19788 states and 26309 transitions. Word has length 169 [2020-10-14 21:25:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:25:18,745 INFO L479 AbstractCegarLoop]: Abstraction has 19788 states and 26309 transitions. [2020-10-14 21:25:18,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 21:25:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 19788 states and 26309 transitions. [2020-10-14 21:25:18,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-14 21:25:18,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:25:18,751 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 21:25:18,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 21:25:18,752 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:25:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:25:18,752 INFO L82 PathProgramCache]: Analyzing trace with hash 751623911, now seen corresponding path program 1 times [2020-10-14 21:25:18,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:25:18,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467769236] [2020-10-14 21:25:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:25:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:18,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:19,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:20,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:22,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:23,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:23,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-14 21:25:23,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 21:25:23,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4419 [2020-10-14 21:25:23,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:23,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:23,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 21:25:23,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:25:23,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-14 21:25:23,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:23,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:25:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:23,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:23,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:23,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:25:23,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:25:23,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 21:25:23,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:23,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:25:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:25:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:25:23,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:23,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:25:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:23,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:23,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:23,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 21:25:23,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:25:23,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-14 21:25:23,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:23,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:25:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:25:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 21:25:23,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:23,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-14 21:25:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:25:23,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:24,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:25:24,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:25:24,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 21:25:24,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:25:24,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-14 21:25:24,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:25:24,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:25:24,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:25:24,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:25:24,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-14 21:25:24,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:25:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-14 21:25:24,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467769236] [2020-10-14 21:25:24,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:25:24,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 21:25:24,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869882044] [2020-10-14 21:25:24,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:25:24,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:25:24,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:25:24,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:25:24,532 INFO L87 Difference]: Start difference. First operand 19788 states and 26309 transitions. Second operand 7 states.