/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:01:15,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:01:15,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:01:15,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:01:15,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:01:15,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:01:15,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:01:15,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:01:15,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:01:15,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:01:15,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:01:15,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:01:15,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:01:15,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:01:15,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:01:15,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:01:15,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:01:15,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:01:15,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:01:15,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:01:15,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:01:15,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:01:15,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:01:15,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:01:15,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:01:15,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:01:15,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:01:15,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:01:15,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:01:15,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:01:15,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:01:15,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:01:15,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:01:15,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:01:15,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:01:15,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:01:15,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:01:15,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:01:15,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:01:15,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:01:15,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:01:15,541 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 [2020-10-26 23:01:15,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:01:15,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:01:15,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:01:15,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:01:15,618 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:01:15,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:01:15,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:01:15,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:01:15,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:01:15,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:01:15,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:01:15,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:01:15,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:01:15,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:01:15,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:01:15,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:01:15,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:01:15,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:01:15,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:01:15,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:01:15,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:01:15,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:01:15,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:01:15,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:01:15,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:01:15,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:01:15,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:01:15,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:01:15,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:01:15,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:01:16,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:01:16,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:01:16,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:01:16,193 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:01:16,193 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:01:16,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label55.c [2020-10-26 23:01:16,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dcef9165e/3346eac798e14675805c1c9ce22195eb/FLAGc46765b3b [2020-10-26 23:01:17,303 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:01:17,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label55.c [2020-10-26 23:01:17,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dcef9165e/3346eac798e14675805c1c9ce22195eb/FLAGc46765b3b [2020-10-26 23:01:17,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dcef9165e/3346eac798e14675805c1c9ce22195eb [2020-10-26 23:01:17,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:01:17,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:01:17,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:01:17,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:01:17,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:01:17,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:01:17" (1/1) ... [2020-10-26 23:01:17,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62890919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:17, skipping insertion in model container [2020-10-26 23:01:17,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:01:17" (1/1) ... [2020-10-26 23:01:17,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:01:18,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:01:19,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:01:19,522 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:01:20,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:01:20,213 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:01:20,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20 WrapperNode [2020-10-26 23:01:20,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:01:20,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:01:20,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:01:20,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:01:20,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20" (1/1) ... [2020-10-26 23:01:20,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20" (1/1) ... [2020-10-26 23:01:20,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20" (1/1) ... [2020-10-26 23:01:20,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20" (1/1) ... [2020-10-26 23:01:20,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20" (1/1) ... [2020-10-26 23:01:20,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20" (1/1) ... [2020-10-26 23:01:20,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20" (1/1) ... [2020-10-26 23:01:20,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:01:20,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:01:20,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:01:20,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:01:20,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20" (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 [2020-10-26 23:01:20,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:01:20,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:01:20,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:01:20,645 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:01:20,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:01:20,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:01:20,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:01:20,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:01:20,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:01:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:01:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:01:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:01:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:01:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:01:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:01:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:01:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:01:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:01:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:01:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:01:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:01:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:01:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:01:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:01:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:01:27,106 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:01:27,109 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:01:27,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:01:27 BoogieIcfgContainer [2020-10-26 23:01:27,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:01:27,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:01:27,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:01:27,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:01:27,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:01:17" (1/3) ... [2020-10-26 23:01:27,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739aa252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:01:27, skipping insertion in model container [2020-10-26 23:01:27,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:01:20" (2/3) ... [2020-10-26 23:01:27,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739aa252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:01:27, skipping insertion in model container [2020-10-26 23:01:27,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:01:27" (3/3) ... [2020-10-26 23:01:27,128 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label55.c [2020-10-26 23:01:27,145 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:01:27,153 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:01:27,170 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:01:27,227 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:01:27,227 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:01:27,227 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:01:27,228 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:01:27,228 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:01:27,228 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:01:27,228 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:01:27,228 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:01:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 23:01:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 23:01:27,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:01:27,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:01:27,279 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:01:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:01:27,291 INFO L82 PathProgramCache]: Analyzing trace with hash -744967124, now seen corresponding path program 1 times [2020-10-26 23:01:27,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:01:27,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550454953] [2020-10-26 23:01:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:01:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:01:27,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:01:28,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:01:28,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 23:01:28,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:01:28,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-26 23:01:28,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:01:28,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:01:28,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:01:28,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 23:01:28,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:01:28,313 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:01:28,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:01:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:01:28,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:01:28,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:01:28,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:01:28,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:01:28,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 23:01:28,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:01:28,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:01:28,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:01:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:01:28,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 23:01:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:01:28,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550454953] [2020-10-26 23:01:28,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:01:28,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:01:28,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917253894] [2020-10-26 23:01:28,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:01:28,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:01:28,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:01:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:01:28,529 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-26 23:01:28,775 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:01:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:01:40,835 INFO L93 Difference]: Finished difference Result 2492 states and 4754 transitions. [2020-10-26 23:01:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:01:40,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-26 23:01:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:01:40,881 INFO L225 Difference]: With dead ends: 2492 [2020-10-26 23:01:40,882 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 23:01:40,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:01:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 23:01:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1565. [2020-10-26 23:01:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2020-10-26 23:01:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2485 transitions. [2020-10-26 23:01:41,144 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2485 transitions. Word has length 15 [2020-10-26 23:01:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:01:41,145 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 2485 transitions. [2020-10-26 23:01:41,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:01:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2485 transitions. [2020-10-26 23:01:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 23:01:41,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:01:41,157 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:01:41,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:01:41,159 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:01:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:01:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1591770005, now seen corresponding path program 1 times [2020-10-26 23:01:41,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:01:41,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620517284] [2020-10-26 23:01:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:01:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:01:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:01:41,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:01:42,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:01:42,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:01:42,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:01:42,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1467 [2020-10-26 23:01:42,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:01:42,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:01:42,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:01:42,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 23:01:42,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:01:42,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:01:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:01:42,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:01:42,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:01:42,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:01:42,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:01:42,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 23:01:42,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:01:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:01:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:01:42,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:01:42,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-26 23:01:42,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:01:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:01:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:01:43,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:01:43,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 23:01:43,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:01:43,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-26 23:01:43,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:01:43,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:01:43,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:01:43,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:01:43,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:01:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:01:43,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620517284] [2020-10-26 23:01:43,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:01:43,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:01:43,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372598315] [2020-10-26 23:01:43,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:01:43,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:01:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:01:43,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:01:43,382 INFO L87 Difference]: Start difference. First operand 1565 states and 2485 transitions. Second operand 7 states. [2020-10-26 23:01:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:01:57,949 INFO L93 Difference]: Finished difference Result 4763 states and 7585 transitions. [2020-10-26 23:01:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:01:57,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-26 23:01:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:01:57,979 INFO L225 Difference]: With dead ends: 4763 [2020-10-26 23:01:57,980 INFO L226 Difference]: Without dead ends: 3204 [2020-10-26 23:01:57,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:01:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2020-10-26 23:01:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3144. [2020-10-26 23:01:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3144 states. [2020-10-26 23:01:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 4560 transitions. [2020-10-26 23:01:58,114 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 4560 transitions. Word has length 94 [2020-10-26 23:01:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:01:58,115 INFO L481 AbstractCegarLoop]: Abstraction has 3144 states and 4560 transitions. [2020-10-26 23:01:58,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:01:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 4560 transitions. [2020-10-26 23:01:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 23:01:58,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:01:58,129 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:01:58,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:01:58,129 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:01:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:01:58,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1011750395, now seen corresponding path program 1 times [2020-10-26 23:01:58,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:01:58,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807441296] [2020-10-26 23:01:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:01:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:01:58,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:01:58,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:01:58,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:01:59,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:01:59,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 23:01:59,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:01:59,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1736 [2020-10-26 23:01:59,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:01:59,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:01:59,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:01:59,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:01:59,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:00,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:02:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:00,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:00,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:00,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:02:00,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:00,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:02:00,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:00,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:02:00,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:02:00,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:02:00,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:02:00,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:02:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:00,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:00,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:00,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 23:02:00,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:00,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-26 23:02:00,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:00,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:02:00,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:02:00,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-26 23:02:00,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:02:00,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807441296] [2020-10-26 23:02:00,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:02:00,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:02:00,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433884880] [2020-10-26 23:02:00,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:02:00,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:02:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:02:00,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:02:00,615 INFO L87 Difference]: Start difference. First operand 3144 states and 4560 transitions. Second operand 7 states. [2020-10-26 23:02:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:02:15,649 INFO L93 Difference]: Finished difference Result 9693 states and 14505 transitions. [2020-10-26 23:02:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:02:15,650 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-26 23:02:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:02:15,701 INFO L225 Difference]: With dead ends: 9693 [2020-10-26 23:02:15,701 INFO L226 Difference]: Without dead ends: 6555 [2020-10-26 23:02:15,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:02:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6555 states. [2020-10-26 23:02:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6555 to 6340. [2020-10-26 23:02:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6340 states. [2020-10-26 23:02:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 8123 transitions. [2020-10-26 23:02:16,003 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 8123 transitions. Word has length 123 [2020-10-26 23:02:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:02:16,004 INFO L481 AbstractCegarLoop]: Abstraction has 6340 states and 8123 transitions. [2020-10-26 23:02:16,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:02:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 8123 transitions. [2020-10-26 23:02:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-26 23:02:16,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:02:16,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:02:16,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:02:16,013 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:02:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:02:16,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1961057561, now seen corresponding path program 1 times [2020-10-26 23:02:16,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:02:16,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786247835] [2020-10-26 23:02:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:02:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:16,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:16,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:16,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:16,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 23:02:16,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:02:16,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-26 23:02:16,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:02:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:02:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-26 23:02:16,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:16,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:02:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:16,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:16,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:16,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:02:16,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:16,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:02:16,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:16,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:02:16,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:02:16,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:02:16,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:16,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:02:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:17,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:17,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:17,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:17,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 23:02:17,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:02:17,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-26 23:02:17,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:17,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:02:17,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:02:17,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-26 23:02:17,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:02:17,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786247835] [2020-10-26 23:02:17,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:02:17,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:02:17,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352262763] [2020-10-26 23:02:17,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:02:17,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:02:17,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:02:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:02:17,741 INFO L87 Difference]: Start difference. First operand 6340 states and 8123 transitions. Second operand 6 states. [2020-10-26 23:02:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:02:31,713 INFO L93 Difference]: Finished difference Result 19079 states and 24907 transitions. [2020-10-26 23:02:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 23:02:31,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2020-10-26 23:02:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:02:31,782 INFO L225 Difference]: With dead ends: 19079 [2020-10-26 23:02:31,783 INFO L226 Difference]: Without dead ends: 12745 [2020-10-26 23:02:31,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:02:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12745 states. [2020-10-26 23:02:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12745 to 11957. [2020-10-26 23:02:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11957 states. [2020-10-26 23:02:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 14904 transitions. [2020-10-26 23:02:32,224 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 14904 transitions. Word has length 160 [2020-10-26 23:02:32,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:02:32,226 INFO L481 AbstractCegarLoop]: Abstraction has 11957 states and 14904 transitions. [2020-10-26 23:02:32,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:02:32,227 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 14904 transitions. [2020-10-26 23:02:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-26 23:02:32,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:02:32,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:02:32,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:02:32,234 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:02:32,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:02:32,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1272803243, now seen corresponding path program 1 times [2020-10-26 23:02:32,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:02:32,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791244396] [2020-10-26 23:02:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:02:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:32,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:32,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:33,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:33,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 23:02:33,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:02:33,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1643 [2020-10-26 23:02:33,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:02:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:02:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 23:02:33,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:34,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:02:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:34,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:34,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:34,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:02:34,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:34,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:02:34,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:02:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:02:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:02:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:34,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:02:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:34,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:34,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 23:02:34,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:34,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-26 23:02:34,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:02:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:02:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 23:02:34,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:02:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:02:35,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791244396] [2020-10-26 23:02:35,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:02:35,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:02:35,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605078534] [2020-10-26 23:02:35,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:02:35,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:02:35,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:02:35,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:02:35,116 INFO L87 Difference]: Start difference. First operand 11957 states and 14904 transitions. Second operand 7 states. [2020-10-26 23:02:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:02:49,841 INFO L93 Difference]: Finished difference Result 29015 states and 35901 transitions. [2020-10-26 23:02:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:02:49,843 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2020-10-26 23:02:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:02:49,913 INFO L225 Difference]: With dead ends: 29015 [2020-10-26 23:02:49,914 INFO L226 Difference]: Without dead ends: 17064 [2020-10-26 23:02:49,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:02:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17064 states. [2020-10-26 23:02:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17064 to 16918. [2020-10-26 23:02:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16918 states. [2020-10-26 23:02:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16918 states to 16918 states and 20511 transitions. [2020-10-26 23:02:50,369 INFO L78 Accepts]: Start accepts. Automaton has 16918 states and 20511 transitions. Word has length 163 [2020-10-26 23:02:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:02:50,370 INFO L481 AbstractCegarLoop]: Abstraction has 16918 states and 20511 transitions. [2020-10-26 23:02:50,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:02:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 16918 states and 20511 transitions. [2020-10-26 23:02:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 23:02:50,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:02:50,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:02:50,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:02:50,375 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:02:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:02:50,376 INFO L82 PathProgramCache]: Analyzing trace with hash 227062168, now seen corresponding path program 1 times [2020-10-26 23:02:50,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:02:50,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047322450] [2020-10-26 23:02:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:02:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:50,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:50,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:51,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:51,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 23:02:51,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:02:51,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-26 23:02:51,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:02:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 23:02:51,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:02:51,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:02:51,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:02:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:51,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:51,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:51,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:02:51,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:51,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 23:02:51,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:02:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:02:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:02:51,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:51,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:02:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:51,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:51,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:51,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:02:51,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:51,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 23:02:51,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:02:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:02:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:02:51,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:52,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 23:02:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:52,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:52,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:52,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 23:02:52,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:52,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-26 23:02:52,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:52,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:02:52,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:02:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:02:52,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:02:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:02:52,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047322450] [2020-10-26 23:02:52,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:02:52,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:02:52,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846341011] [2020-10-26 23:02:52,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:02:52,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:02:52,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:02:52,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:02:52,650 INFO L87 Difference]: Start difference. First operand 16918 states and 20511 transitions. Second operand 7 states. [2020-10-26 23:03:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:03:10,551 INFO L93 Difference]: Finished difference Result 39873 states and 50432 transitions. [2020-10-26 23:03:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:03:10,554 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-10-26 23:03:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:03:10,636 INFO L225 Difference]: With dead ends: 39873 [2020-10-26 23:03:10,637 INFO L226 Difference]: Without dead ends: 20520 [2020-10-26 23:03:10,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:03:10,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20520 states. [2020-10-26 23:03:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20520 to 20236. [2020-10-26 23:03:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20236 states. [2020-10-26 23:03:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20236 states to 20236 states and 24020 transitions. [2020-10-26 23:03:11,292 INFO L78 Accepts]: Start accepts. Automaton has 20236 states and 24020 transitions. Word has length 203 [2020-10-26 23:03:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:03:11,293 INFO L481 AbstractCegarLoop]: Abstraction has 20236 states and 24020 transitions. [2020-10-26 23:03:11,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:03:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 20236 states and 24020 transitions. [2020-10-26 23:03:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-26 23:03:11,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:11,298 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:03:11,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:03:11,298 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:03:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:03:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash -222718884, now seen corresponding path program 1 times [2020-10-26 23:03:11,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:03:11,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937833502] [2020-10-26 23:03:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:03:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:11,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:12,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:13,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:13,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-26 23:03:13,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:03:13,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1682 [2020-10-26 23:03:13,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:13,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:03:13,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 23:03:13,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:03:13,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:13,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:03:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:13,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:13,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:13,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:03:13,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:13,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:03:13,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:13,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:03:13,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:13,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:03:13,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:13,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:03:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:13,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:13,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:13,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 23:03:13,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:13,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-26 23:03:13,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:13,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:03:13,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:13,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 23:03:13,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:13,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 23:03:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:13,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:13,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:13,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:03:13,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:13,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 23:03:13,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:13,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:03:13,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:03:13,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:03:13,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:03:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:03:13,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937833502] [2020-10-26 23:03:13,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:03:13,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:03:13,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370696635] [2020-10-26 23:03:13,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:03:13,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:03:13,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:03:13,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:03:13,794 INFO L87 Difference]: Start difference. First operand 20236 states and 24020 transitions. Second operand 7 states. [2020-10-26 23:03:36,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:03:36,006 INFO L93 Difference]: Finished difference Result 53602 states and 67228 transitions. [2020-10-26 23:03:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:03:36,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 249 [2020-10-26 23:03:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:03:36,150 INFO L225 Difference]: With dead ends: 53602 [2020-10-26 23:03:36,151 INFO L226 Difference]: Without dead ends: 34139 [2020-10-26 23:03:36,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:03:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34139 states. [2020-10-26 23:03:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34139 to 33176. [2020-10-26 23:03:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33176 states. [2020-10-26 23:03:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33176 states to 33176 states and 40572 transitions. [2020-10-26 23:03:37,150 INFO L78 Accepts]: Start accepts. Automaton has 33176 states and 40572 transitions. Word has length 249 [2020-10-26 23:03:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:03:37,151 INFO L481 AbstractCegarLoop]: Abstraction has 33176 states and 40572 transitions. [2020-10-26 23:03:37,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:03:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 33176 states and 40572 transitions. [2020-10-26 23:03:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 23:03:37,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:37,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:03:37,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:03:37,157 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:03:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:03:37,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1401275564, now seen corresponding path program 1 times [2020-10-26 23:03:37,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:03:37,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165168977] [2020-10-26 23:03:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:03:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:37,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:37,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:38,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:39,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:39,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-26 23:03:39,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:03:39,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2131 [2020-10-26 23:03:39,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:39,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:03:39,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 23:03:39,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:03:39,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:39,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:03:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:39,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:39,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:39,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:03:39,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:39,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:03:39,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:39,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:03:39,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:39,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:03:39,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:39,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:03:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:39,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:39,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:39,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 23:03:39,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:39,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-26 23:03:39,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:39,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:03:39,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:39,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 23:03:39,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:39,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 23:03:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:39,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:39,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:39,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:03:39,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:39,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 23:03:39,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:03:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:03:39,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:03:39,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:03:40,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165168977] [2020-10-26 23:03:40,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:03:40,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:03:40,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344538033] [2020-10-26 23:03:40,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:03:40,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:03:40,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:03:40,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:03:40,155 INFO L87 Difference]: Start difference. First operand 33176 states and 40572 transitions. Second operand 7 states. [2020-10-26 23:04:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:00,439 INFO L93 Difference]: Finished difference Result 82190 states and 106142 transitions. [2020-10-26 23:04:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:04:00,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 253 [2020-10-26 23:04:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:00,616 INFO L225 Difference]: With dead ends: 82190 [2020-10-26 23:04:00,616 INFO L226 Difference]: Without dead ends: 49787 [2020-10-26 23:04:00,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:04:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49787 states. [2020-10-26 23:04:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49787 to 47885. [2020-10-26 23:04:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47885 states. [2020-10-26 23:04:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47885 states to 47885 states and 58234 transitions. [2020-10-26 23:04:02,284 INFO L78 Accepts]: Start accepts. Automaton has 47885 states and 58234 transitions. Word has length 253 [2020-10-26 23:04:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:02,285 INFO L481 AbstractCegarLoop]: Abstraction has 47885 states and 58234 transitions. [2020-10-26 23:04:02,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:04:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 47885 states and 58234 transitions. [2020-10-26 23:04:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-26 23:04:02,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:02,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:04:02,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:04:02,291 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:02,292 INFO L82 PathProgramCache]: Analyzing trace with hash -579379308, now seen corresponding path program 1 times [2020-10-26 23:04:02,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:02,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419398984] [2020-10-26 23:04:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:02,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:03,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:03,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-26 23:04:03,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:03,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 648 [2020-10-26 23:04:03,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:03,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:03,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 282 [2020-10-26 23:04:03,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 23:04:03,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:03,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:03,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:03,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:03,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:03,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:03,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:04:03,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:04:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:04:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:03,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:03,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:03,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:03,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 23:04:03,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:03,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 23:04:03,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:03,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:04:03,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:03,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:04:03,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:03,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 23:04:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:03,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:03,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:03,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 23:04:03,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:03,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 23:04:03,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:03,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:03,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:03,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:04:03,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:04:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-26 23:04:03,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419398984] [2020-10-26 23:04:03,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:04:03,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:04:03,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113321534] [2020-10-26 23:04:03,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:04:03,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:03,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:04:03,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:04:03,776 INFO L87 Difference]: Start difference. First operand 47885 states and 58234 transitions. Second operand 5 states. [2020-10-26 23:04:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:21,378 INFO L93 Difference]: Finished difference Result 113743 states and 142928 transitions. [2020-10-26 23:04:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:04:21,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 285 [2020-10-26 23:04:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:21,624 INFO L225 Difference]: With dead ends: 113743 [2020-10-26 23:04:21,624 INFO L226 Difference]: Without dead ends: 66631 [2020-10-26 23:04:21,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:04:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66631 states. [2020-10-26 23:04:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66631 to 65813. [2020-10-26 23:04:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65813 states. [2020-10-26 23:04:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65813 states to 65813 states and 79749 transitions. [2020-10-26 23:04:23,901 INFO L78 Accepts]: Start accepts. Automaton has 65813 states and 79749 transitions. Word has length 285 [2020-10-26 23:04:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:23,902 INFO L481 AbstractCegarLoop]: Abstraction has 65813 states and 79749 transitions. [2020-10-26 23:04:23,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:04:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 65813 states and 79749 transitions. [2020-10-26 23:04:23,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-10-26 23:04:23,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:23,913 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 23:04:23,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:04:23,913 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:23,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash -351691215, now seen corresponding path program 1 times [2020-10-26 23:04:23,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:23,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989841491] [2020-10-26 23:04:23,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:24,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:24,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:26,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-26 23:04:26,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:04:26,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2274 [2020-10-26 23:04:26,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 260 [2020-10-26 23:04:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 23:04:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:26,708 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:04:26,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:26,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:26,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:26,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:26,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:26,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:04:26,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:26,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:04:26,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:26,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:04:26,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:26,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:26,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:26,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:26,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 23:04:26,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:26,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 23:04:26,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:04:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:04:26,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:26,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 23:04:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:26,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:27,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:27,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 23:04:27,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:27,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-26 23:04:27,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:27,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:27,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:27,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 23:04:27,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:27,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-10-26 23:04:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:27,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:27,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:27,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 23:04:27,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:27,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-26 23:04:27,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:27,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:04:27,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 23:04:27,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 247 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-26 23:04:27,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989841491] [2020-10-26 23:04:27,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:04:27,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:04:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195877143] [2020-10-26 23:04:27,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:04:27,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:04:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:27,585 INFO L87 Difference]: Start difference. First operand 65813 states and 79749 transitions. Second operand 7 states. [2020-10-26 23:04:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:49,005 INFO L93 Difference]: Finished difference Result 131211 states and 160468 transitions. [2020-10-26 23:04:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:04:49,008 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 387 [2020-10-26 23:04:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:49,457 INFO L225 Difference]: With dead ends: 131211 [2020-10-26 23:04:49,457 INFO L226 Difference]: Without dead ends: 66171 [2020-10-26 23:04:49,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:04:49,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66171 states. [2020-10-26 23:04:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66171 to 65201. [2020-10-26 23:04:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65201 states. [2020-10-26 23:04:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65201 states to 65201 states and 77166 transitions. [2020-10-26 23:04:51,534 INFO L78 Accepts]: Start accepts. Automaton has 65201 states and 77166 transitions. Word has length 387 [2020-10-26 23:04:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:51,535 INFO L481 AbstractCegarLoop]: Abstraction has 65201 states and 77166 transitions. [2020-10-26 23:04:51,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:04:51,535 INFO L276 IsEmpty]: Start isEmpty. Operand 65201 states and 77166 transitions. [2020-10-26 23:04:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-26 23:04:51,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:51,547 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:04:51,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:04:51,547 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:51,548 INFO L82 PathProgramCache]: Analyzing trace with hash 723864257, now seen corresponding path program 1 times [2020-10-26 23:04:51,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:51,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540558788] [2020-10-26 23:04:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:51,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:52,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:53,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:53,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking...