/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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 21:33:56,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 21:33:56,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 21:33:57,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 21:33:57,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 21:33:57,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 21:33:57,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 21:33:57,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 21:33:57,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 21:33:57,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 21:33:57,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 21:33:57,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 21:33:57,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 21:33:57,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 21:33:57,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 21:33:57,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 21:33:57,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 21:33:57,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 21:33:57,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 21:33:57,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 21:33:57,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 21:33:57,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 21:33:57,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 21:33:57,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 21:33:57,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 21:33:57,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 21:33:57,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 21:33:57,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 21:33:57,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 21:33:57,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 21:33:57,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 21:33:57,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 21:33:57,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 21:33:57,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 21:33:57,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 21:33:57,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 21:33:57,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 21:33:57,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 21:33:57,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 21:33:57,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 21:33:57,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 21:33:57,116 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 21:33:57,156 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 21:33:57,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 21:33:57,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 21:33:57,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 21:33:57,159 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 21:33:57,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 21:33:57,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 21:33:57,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 21:33:57,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 21:33:57,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 21:33:57,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 21:33:57,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 21:33:57,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 21:33:57,163 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 21:33:57,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 21:33:57,163 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 21:33:57,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 21:33:57,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 21:33:57,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 21:33:57,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 21:33:57,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 21:33:57,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 21:33:57,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 21:33:57,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 21:33:57,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 21:33:57,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 21:33:57,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 21:33:57,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 21:33:57,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 21:33:57,166 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 21:33:57,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 21:33:57,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 21:33:57,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 21:33:57,539 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 21:33:57,542 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 21:33:57,543 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label45.c [2020-10-14 21:33:57,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f426fcf51/a77169fdbab64c24b71501a6522225d4/FLAG8b66f12b9 [2020-10-14 21:33:58,473 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 21:33:58,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label45.c [2020-10-14 21:33:58,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f426fcf51/a77169fdbab64c24b71501a6522225d4/FLAG8b66f12b9 [2020-10-14 21:33:58,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f426fcf51/a77169fdbab64c24b71501a6522225d4 [2020-10-14 21:33:58,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 21:33:58,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 21:33:58,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 21:33:58,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 21:33:58,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 21:33:58,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:33:58" (1/1) ... [2020-10-14 21:33:58,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56344ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:58, skipping insertion in model container [2020-10-14 21:33:58,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:33:58" (1/1) ... [2020-10-14 21:33:59,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 21:33:59,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 21:34:01,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:34:01,187 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 21:34:01,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:34:01,969 INFO L208 MainTranslator]: Completed translation [2020-10-14 21:34:01,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01 WrapperNode [2020-10-14 21:34:01,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 21:34:01,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 21:34:01,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 21:34:01,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 21:34:01,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01" (1/1) ... [2020-10-14 21:34:01,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01" (1/1) ... [2020-10-14 21:34:02,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01" (1/1) ... [2020-10-14 21:34:02,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01" (1/1) ... [2020-10-14 21:34:02,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01" (1/1) ... [2020-10-14 21:34:02,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01" (1/1) ... [2020-10-14 21:34:02,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01" (1/1) ... [2020-10-14 21:34:02,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 21:34:02,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 21:34:02,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 21:34:02,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 21:34:02,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01" (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 21:34:02,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 21:34:02,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 21:34:02,439 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 21:34:02,440 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 21:34:02,440 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 21:34:02,440 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 21:34:02,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 21:34:02,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 21:34:02,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 21:34:02,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 21:34:02,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 21:34:02,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 21:34:02,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 21:34:02,443 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 21:34:02,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 21:34:02,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 21:34:02,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 21:34:14,239 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 21:34:14,240 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 21:34:14,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:34:14 BoogieIcfgContainer [2020-10-14 21:34:14,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 21:34:14,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 21:34:14,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 21:34:14,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 21:34:14,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:33:58" (1/3) ... [2020-10-14 21:34:14,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7eab49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:34:14, skipping insertion in model container [2020-10-14 21:34:14,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:34:01" (2/3) ... [2020-10-14 21:34:14,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7eab49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:34:14, skipping insertion in model container [2020-10-14 21:34:14,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:34:14" (3/3) ... [2020-10-14 21:34:14,274 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label45.c [2020-10-14 21:34:14,286 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 21:34:14,298 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 21:34:14,313 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 21:34:14,350 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 21:34:14,351 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 21:34:14,351 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 21:34:14,351 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 21:34:14,351 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 21:34:14,351 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 21:34:14,351 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 21:34:14,352 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 21:34:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-14 21:34:14,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 21:34:14,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:34:14,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:34:14,413 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:34:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:34:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1434155184, now seen corresponding path program 1 times [2020-10-14 21:34:14,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:34:14,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554640261] [2020-10-14 21:34:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:34:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:14,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:14,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:14,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 21:34:14,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:14,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-14 21:34:14,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:14,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:14,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:34:14,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:34:14,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 21:34:14,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 21:34:14,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:34:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:14,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:15,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:15,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:34:15,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:15,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 21:34:15,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:15,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:34:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:34:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:34:15,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:15,025 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 21:34:15,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554640261] [2020-10-14 21:34:15,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:34:15,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 21:34:15,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038155646] [2020-10-14 21:34:15,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 21:34:15,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:34:15,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 21:34:15,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 21:34:15,054 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-14 21:34:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:34:30,540 INFO L93 Difference]: Finished difference Result 3204 states and 5913 transitions. [2020-10-14 21:34:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:34:30,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-14 21:34:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:34:30,587 INFO L225 Difference]: With dead ends: 3204 [2020-10-14 21:34:30,587 INFO L226 Difference]: Without dead ends: 2006 [2020-10-14 21:34:30,599 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 21:34:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2020-10-14 21:34:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1920. [2020-10-14 21:34:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1920 states. [2020-10-14 21:34:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 3311 transitions. [2020-10-14 21:34:30,788 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 3311 transitions. Word has length 13 [2020-10-14 21:34:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:34:30,788 INFO L479 AbstractCegarLoop]: Abstraction has 1920 states and 3311 transitions. [2020-10-14 21:34:30,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 21:34:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 3311 transitions. [2020-10-14 21:34:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 21:34:30,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:34:30,793 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 21:34:30,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 21:34:30,794 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:34:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:34:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2043822807, now seen corresponding path program 1 times [2020-10-14 21:34:30,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:34:30,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763204376] [2020-10-14 21:34:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:34:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:30,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:31,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:31,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:31,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 21:34:31,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:34:31,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-14 21:34:31,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:31,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:31,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:34:31,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:34:31,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 21:34:31,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:34:31,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:34:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:31,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:31,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:34:31,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:31,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 21:34:31,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:31,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:31,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:34:31,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:34:31,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:34:31,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:31,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:34:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:31,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:32,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:32,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 21:34:32,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:32,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-14 21:34:32,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:32,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:32,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:34:32,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:34:32,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 21:34:32,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:34:32,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763204376] [2020-10-14 21:34:32,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:34:32,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:34:32,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734956978] [2020-10-14 21:34:32,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:34:32,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:34:32,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:34:32,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:34:32,138 INFO L87 Difference]: Start difference. First operand 1920 states and 3311 transitions. Second operand 7 states. [2020-10-14 21:34:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:34:52,719 INFO L93 Difference]: Finished difference Result 5753 states and 9952 transitions. [2020-10-14 21:34:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 21:34:52,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 21:34:52,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:34:52,753 INFO L225 Difference]: With dead ends: 5753 [2020-10-14 21:34:52,753 INFO L226 Difference]: Without dead ends: 3839 [2020-10-14 21:34:52,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-14 21:34:52,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2020-10-14 21:34:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3775. [2020-10-14 21:34:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3775 states. [2020-10-14 21:34:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 5933 transitions. [2020-10-14 21:34:52,986 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 5933 transitions. Word has length 82 [2020-10-14 21:34:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:34:52,987 INFO L479 AbstractCegarLoop]: Abstraction has 3775 states and 5933 transitions. [2020-10-14 21:34:52,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:34:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 5933 transitions. [2020-10-14 21:34:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 21:34:52,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:34:52,992 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 21:34:52,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 21:34:52,993 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:34:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:34:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1490702155, now seen corresponding path program 1 times [2020-10-14 21:34:52,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:34:52,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983409672] [2020-10-14 21:34:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:34:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:53,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:53,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:53,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 21:34:53,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:53,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-14 21:34:53,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:53,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:34:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:34:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 21:34:53,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:53,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:34:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:53,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:53,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:53,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:34:53,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:53,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 21:34:53,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:53,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:34:53,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:34:53,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:34:53,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:53,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:34:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:53,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:53,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:53,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 21:34:53,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-14 21:34:53,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:53,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:53,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:34:53,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:34:53,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 21:34:53,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:34:53,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983409672] [2020-10-14 21:34:53,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:34:53,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:34:53,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787821483] [2020-10-14 21:34:53,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:34:53,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:34:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:34:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:34:53,655 INFO L87 Difference]: Start difference. First operand 3775 states and 5933 transitions. Second operand 7 states. [2020-10-14 21:35:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:35:23,132 INFO L93 Difference]: Finished difference Result 11311 states and 18254 transitions. [2020-10-14 21:35:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:35:23,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-10-14 21:35:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:35:23,172 INFO L225 Difference]: With dead ends: 11311 [2020-10-14 21:35:23,173 INFO L226 Difference]: Without dead ends: 7542 [2020-10-14 21:35:23,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:35:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7542 states. [2020-10-14 21:35:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7542 to 7326. [2020-10-14 21:35:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7326 states. [2020-10-14 21:35:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7326 states to 7326 states and 10710 transitions. [2020-10-14 21:35:23,421 INFO L78 Accepts]: Start accepts. Automaton has 7326 states and 10710 transitions. Word has length 88 [2020-10-14 21:35:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:35:23,423 INFO L479 AbstractCegarLoop]: Abstraction has 7326 states and 10710 transitions. [2020-10-14 21:35:23,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:35:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 7326 states and 10710 transitions. [2020-10-14 21:35:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 21:35:23,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:35:23,439 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 21:35:23,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 21:35:23,439 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:35:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:35:23,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1360633355, now seen corresponding path program 1 times [2020-10-14 21:35:23,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:35:23,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706528140] [2020-10-14 21:35:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:35:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:23,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:23,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:24,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:24,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 21:35:24,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:35:24,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-10-14 21:35:24,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:24,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:24,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:35:24,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:35:24,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-14 21:35:24,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:35:24,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:35:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:24,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:24,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:35:24,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:35:24,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 21:35:24,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:24,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:35:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:35:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:35:24,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:35:24,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:35:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:24,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:24,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:24,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 21:35:24,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:35:24,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-14 21:35:24,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:24,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:24,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:35:24,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:35:24,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 21:35:24,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:35:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:35:25,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706528140] [2020-10-14 21:35:25,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:35:25,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:35:25,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152950959] [2020-10-14 21:35:25,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:35:25,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:35:25,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:35:25,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:35:25,068 INFO L87 Difference]: Start difference. First operand 7326 states and 10710 transitions. Second operand 7 states. [2020-10-14 21:35:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:35:51,060 INFO L93 Difference]: Finished difference Result 22253 states and 34168 transitions. [2020-10-14 21:35:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:35:51,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-10-14 21:35:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:35:51,148 INFO L225 Difference]: With dead ends: 22253 [2020-10-14 21:35:51,148 INFO L226 Difference]: Without dead ends: 14933 [2020-10-14 21:35:51,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:35:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14933 states. [2020-10-14 21:35:51,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14933 to 14582. [2020-10-14 21:35:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14582 states. [2020-10-14 21:35:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14582 states to 14582 states and 19901 transitions. [2020-10-14 21:35:51,669 INFO L78 Accepts]: Start accepts. Automaton has 14582 states and 19901 transitions. Word has length 120 [2020-10-14 21:35:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:35:51,673 INFO L479 AbstractCegarLoop]: Abstraction has 14582 states and 19901 transitions. [2020-10-14 21:35:51,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:35:51,674 INFO L276 IsEmpty]: Start isEmpty. Operand 14582 states and 19901 transitions. [2020-10-14 21:35:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 21:35:51,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:35:51,683 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 21:35:51,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 21:35:51,683 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:35:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:35:51,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1883797838, now seen corresponding path program 1 times [2020-10-14 21:35:51,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:35:51,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490399506] [2020-10-14 21:35:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:35:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:51,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:51,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:52,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:52,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-14 21:35:52,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:35:52,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1133 [2020-10-14 21:35:52,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:52,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:52,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:35:52,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:35:52,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 21:35:52,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:35:52,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:35:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:52,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:52,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:52,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:35:52,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:35:52,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 21:35:52,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:52,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:35:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:35:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:35:52,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:35:52,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:35:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:53,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:53,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:53,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 21:35:53,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:35:53,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-14 21:35:53,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:53,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:53,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:35:53,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:35:53,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-14 21:35:53,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 21:35:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:35:53,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490399506] [2020-10-14 21:35:53,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:35:53,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 21:35:53,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968399193] [2020-10-14 21:35:53,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 21:35:53,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:35:53,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 21:35:53,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 21:35:53,514 INFO L87 Difference]: Start difference. First operand 14582 states and 19901 transitions. Second operand 8 states. [2020-10-14 21:36:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:36:22,576 INFO L93 Difference]: Finished difference Result 51568 states and 77542 transitions. [2020-10-14 21:36:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 21:36:22,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-10-14 21:36:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:36:22,752 INFO L225 Difference]: With dead ends: 51568 [2020-10-14 21:36:22,753 INFO L226 Difference]: Without dead ends: 36992 [2020-10-14 21:36:22,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-14 21:36:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36992 states. [2020-10-14 21:36:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36992 to 35155. [2020-10-14 21:36:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35155 states. [2020-10-14 21:36:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35155 states to 35155 states and 47149 transitions. [2020-10-14 21:36:25,595 INFO L78 Accepts]: Start accepts. Automaton has 35155 states and 47149 transitions. Word has length 131 [2020-10-14 21:36:25,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:36:25,597 INFO L479 AbstractCegarLoop]: Abstraction has 35155 states and 47149 transitions. [2020-10-14 21:36:25,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 21:36:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 35155 states and 47149 transitions. [2020-10-14 21:36:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-14 21:36:25,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:36:25,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 21:36:25,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 21:36:25,603 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:36:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:36:25,604 INFO L82 PathProgramCache]: Analyzing trace with hash 434410572, now seen corresponding path program 1 times [2020-10-14 21:36:25,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:36:25,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132924648] [2020-10-14 21:36:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:36:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:36:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:36:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:36:25,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:36:30,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:36:30,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-14 21:36:30,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:36:30,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 21:36:30,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:36:30,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:36:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:36:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-14 21:36:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-14 21:36:30,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:36:30,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:36:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:36:30,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:36:30,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:36:30,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:36:30,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:36:30,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 21:36:30,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:36:30,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:36:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 21:36:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:36:30,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 21:36:30,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:36:30,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:36:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:36:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:36:30,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:36:30,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 21:36:30,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:36:30,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-14 21:36:30,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:36:30,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:36:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:36:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:36:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 21:36:30,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:36:31,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-14 21:36:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:36:31,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:36:31,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:36:31,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 21:36:31,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:36:31,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-14 21:36:31,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:36:31,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:36:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:36:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:36:31,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 21:36:31,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:36:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 21:36:31,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132924648] [2020-10-14 21:36:31,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:36:31,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 21:36:31,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385041402] [2020-10-14 21:36:31,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:36:31,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:36:31,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:36:31,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:36:31,484 INFO L87 Difference]: Start difference. First operand 35155 states and 47149 transitions. Second operand 7 states. [2020-10-14 21:37:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:37:05,385 INFO L93 Difference]: Finished difference Result 94158 states and 133262 transitions. [2020-10-14 21:37:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:37:05,390 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 213 [2020-10-14 21:37:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:37:05,709 INFO L225 Difference]: With dead ends: 94158 [2020-10-14 21:37:05,709 INFO L226 Difference]: Without dead ends: 59009 [2020-10-14 21:37:05,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:37:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59009 states. [2020-10-14 21:37:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59009 to 58558. [2020-10-14 21:37:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58558 states. [2020-10-14 21:37:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58558 states to 58558 states and 81759 transitions. [2020-10-14 21:37:07,774 INFO L78 Accepts]: Start accepts. Automaton has 58558 states and 81759 transitions. Word has length 213 [2020-10-14 21:37:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:37:07,776 INFO L479 AbstractCegarLoop]: Abstraction has 58558 states and 81759 transitions. [2020-10-14 21:37:07,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:37:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 58558 states and 81759 transitions. [2020-10-14 21:37:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-14 21:37:07,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:37:07,782 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 21:37:07,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 21:37:07,783 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:37:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:37:07,783 INFO L82 PathProgramCache]: Analyzing trace with hash 978776612, now seen corresponding path program 1 times [2020-10-14 21:37:07,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:37:07,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674855043] [2020-10-14 21:37:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:37:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:37:07,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:08,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:08,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:10,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:10,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:12,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:37:12,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-14 21:37:12,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 21:37:12,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 21:37:12,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:37:12,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:37:12,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:37:12,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-14 21:37:12,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 21:37:12,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:37:13,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:37:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:37:13,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:13,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:37:13,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:37:13,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:37:13,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 21:37:13,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:37:13,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:37:13,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 21:37:13,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:37:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 21:37:13,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:37:13,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:37:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:37:13,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:13,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:37:13,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 21:37:13,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:37:13,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-14 21:37:13,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:37:13,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:37:13,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:37:13,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:37:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 21:37:13,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:37:13,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-14 21:37:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:37:13,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:13,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:13,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:37:13,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 21:37:13,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:37:13,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-14 21:37:13,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:37:13,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:37:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:37:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:37:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 21:37:13,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:37:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-14 21:37:13,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674855043] [2020-10-14 21:37:13,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:37:13,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 21:37:13,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752798183] [2020-10-14 21:37:13,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 21:37:13,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:37:13,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 21:37:13,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 21:37:13,709 INFO L87 Difference]: Start difference. First operand 58558 states and 81759 transitions. Second operand 6 states. [2020-10-14 21:37:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:37:39,662 INFO L93 Difference]: Finished difference Result 117118 states and 163604 transitions. [2020-10-14 21:37:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:37:39,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 222 [2020-10-14 21:37:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:37:39,825 INFO L225 Difference]: With dead ends: 117118 [2020-10-14 21:37:39,825 INFO L226 Difference]: Without dead ends: 58566 [2020-10-14 21:37:39,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:37:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58566 states. [2020-10-14 21:37:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58566 to 54538. [2020-10-14 21:37:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54538 states. [2020-10-14 21:37:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54538 states to 54538 states and 69883 transitions. [2020-10-14 21:37:40,940 INFO L78 Accepts]: Start accepts. Automaton has 54538 states and 69883 transitions. Word has length 222 [2020-10-14 21:37:40,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:37:40,941 INFO L479 AbstractCegarLoop]: Abstraction has 54538 states and 69883 transitions. [2020-10-14 21:37:40,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 21:37:40,941 INFO L276 IsEmpty]: Start isEmpty. Operand 54538 states and 69883 transitions. [2020-10-14 21:37:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-14 21:37:40,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:37:40,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 21:37:40,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 21:37:40,946 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:37:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:37:40,947 INFO L82 PathProgramCache]: Analyzing trace with hash -888415231, now seen corresponding path program 1 times [2020-10-14 21:37:40,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:37:40,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327718804] [2020-10-14 21:37:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:37:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:37:41,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:41,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:41,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:42,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:43,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:37:43,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-14 21:37:43,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 21:37:43,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2175 [2020-10-14 21:37:43,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:37:43,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:37:43,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 21:37:43,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:37:43,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-14 21:37:43,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 21:37:43,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:37:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:37:43,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:43,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:37:43,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:37:43,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:37:43,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 21:37:43,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:37:43,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:37:43,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:37:43,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:37:43,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:37:43,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:37:43,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:37:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:37:43,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:43,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:43,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:37:43,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 21:37:43,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:37:43,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-14 21:37:43,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:37:43,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:37:43,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:37:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:37:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 21:37:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:37:43,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-14 21:37:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:37:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:43,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:37:44,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:37:44,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 21:37:44,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:37:44,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-14 21:37:44,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:37:44,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:37:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:37:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:37:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 21:37:44,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:37:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-14 21:37:44,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327718804] [2020-10-14 21:37:44,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:37:44,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 21:37:44,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622666402] [2020-10-14 21:37:44,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:37:44,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:37:44,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:37:44,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:37:44,349 INFO L87 Difference]: Start difference. First operand 54538 states and 69883 transitions. Second operand 7 states. [2020-10-14 21:37:48,509 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 47