/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/Problem15_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:40:35,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:40:35,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:40:35,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:40:35,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:40:35,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:40:35,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:40:35,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:40:35,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:40:35,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:40:35,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:40:35,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:40:35,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:40:35,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:40:35,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:40:35,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:40:35,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:40:35,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:40:35,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:40:35,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:40:35,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:40:35,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:40:35,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:40:35,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:40:35,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:40:35,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:40:35,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:40:35,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:40:35,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:40:35,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:40:35,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:40:35,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:40:35,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:40:35,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:40:35,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:40:35,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:40:35,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:40:35,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:40:35,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:40:35,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:40:35,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:40:35,570 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 23:40:35,624 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:40:35,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:40:35,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:40:35,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:40:35,637 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:40:35,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:40:35,638 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:40:35,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:40:35,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:40:35,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:40:35,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:40:35,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:40:35,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:40:35,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:40:35,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:40:35,640 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:40:35,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:40:35,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:40:35,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:40:35,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:40:35,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:40:35,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:40:35,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:40:35,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:40:35,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:40:35,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:40:35,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:40:35,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:40:35,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:40:35,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:40:36,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:40:36,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:40:36,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:40:36,146 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:40:36,147 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:40:36,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label26.c [2020-10-26 23:40:36,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb6d2ddc3/1e6cd57950554314a5230b570b760185/FLAGfa7e3995b [2020-10-26 23:40:37,134 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:40:37,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label26.c [2020-10-26 23:40:37,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb6d2ddc3/1e6cd57950554314a5230b570b760185/FLAGfa7e3995b [2020-10-26 23:40:37,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb6d2ddc3/1e6cd57950554314a5230b570b760185 [2020-10-26 23:40:37,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:40:37,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:40:37,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:40:37,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:40:37,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:40:37,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:40:37" (1/1) ... [2020-10-26 23:40:37,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ac0f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:37, skipping insertion in model container [2020-10-26 23:40:37,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:40:37" (1/1) ... [2020-10-26 23:40:37,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:40:37,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:40:38,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:40:38,291 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:40:38,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:40:38,701 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:40:38,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38 WrapperNode [2020-10-26 23:40:38,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:40:38,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:40:38,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:40:38,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:40:38,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38" (1/1) ... [2020-10-26 23:40:38,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38" (1/1) ... [2020-10-26 23:40:38,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38" (1/1) ... [2020-10-26 23:40:38,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38" (1/1) ... [2020-10-26 23:40:38,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38" (1/1) ... [2020-10-26 23:40:38,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38" (1/1) ... [2020-10-26 23:40:38,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38" (1/1) ... [2020-10-26 23:40:38,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:40:38,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:40:38,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:40:38,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:40:38,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38" (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 23:40:39,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:40:39,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:40:39,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:40:39,039 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:40:39,039 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:40:39,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:40:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:40:39,040 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:40:39,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:40:39,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:40:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:40:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:40:39,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:40:39,042 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:40:39,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:40:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:40:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:40:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:40:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:40:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:40:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:40:42,674 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:40:42,675 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:40:42,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:40:42 BoogieIcfgContainer [2020-10-26 23:40:42,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:40:42,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:40:42,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:40:42,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:40:42,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:40:37" (1/3) ... [2020-10-26 23:40:42,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710bf97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:40:42, skipping insertion in model container [2020-10-26 23:40:42,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:38" (2/3) ... [2020-10-26 23:40:42,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710bf97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:40:42, skipping insertion in model container [2020-10-26 23:40:42,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:40:42" (3/3) ... [2020-10-26 23:40:42,688 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label26.c [2020-10-26 23:40:42,701 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:40:42,708 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:40:42,723 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:40:42,756 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:40:42,757 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:40:42,757 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:40:42,757 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:40:42,757 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:40:42,757 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:40:42,757 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:40:42,757 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:40:42,788 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:40:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 23:40:42,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:42,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:42,799 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:42,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2101893985, now seen corresponding path program 1 times [2020-10-26 23:40:42,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:42,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363882348] [2020-10-26 23:40:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:43,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:43,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:43,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:40:43,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:43,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-26 23:40:43,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 23:40:43,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:40:43,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:43,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:44,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:44,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:44,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:44,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:40:44,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:44,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:44,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:44,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:44,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:44,056 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 23:40:44,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363882348] [2020-10-26 23:40:44,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:44,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:40:44,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894403575] [2020-10-26 23:40:44,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:40:44,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:44,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:40:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:40:44,086 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:40:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:49,716 INFO L93 Difference]: Finished difference Result 1229 states and 2206 transitions. [2020-10-26 23:40:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:40:49,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-26 23:40:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:49,756 INFO L225 Difference]: With dead ends: 1229 [2020-10-26 23:40:49,757 INFO L226 Difference]: Without dead ends: 709 [2020-10-26 23:40:49,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:40:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-26 23:40:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 695. [2020-10-26 23:40:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-26 23:40:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1081 transitions. [2020-10-26 23:40:49,903 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1081 transitions. Word has length 60 [2020-10-26 23:40:49,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:49,904 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1081 transitions. [2020-10-26 23:40:49,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:40:49,910 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1081 transitions. [2020-10-26 23:40:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 23:40:49,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:49,916 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:40:49,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:40:49,917 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:49,918 INFO L82 PathProgramCache]: Analyzing trace with hash -46364134, now seen corresponding path program 1 times [2020-10-26 23:40:49,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:49,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8082420] [2020-10-26 23:40:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:50,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:51,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:51,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:52,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:52,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 23:40:52,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:40:52,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2187 [2020-10-26 23:40:52,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:52,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:40:52,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:52,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:52,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:52,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:52,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:52,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:52,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 23:40:52,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:52,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:52,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:52,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:52,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:40:52,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:52,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:52,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:52,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:40:52,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:52,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-26 23:40:52,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:52,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:52,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:52,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:40:52,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:52,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8082420] [2020-10-26 23:40:52,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:52,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:40:52,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644495002] [2020-10-26 23:40:52,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:52,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:52,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:52,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:52,708 INFO L87 Difference]: Start difference. First operand 695 states and 1081 transitions. Second operand 7 states. [2020-10-26 23:41:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:00,257 INFO L93 Difference]: Finished difference Result 1722 states and 2740 transitions. [2020-10-26 23:41:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:41:00,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-26 23:41:00,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:00,267 INFO L225 Difference]: With dead ends: 1722 [2020-10-26 23:41:00,268 INFO L226 Difference]: Without dead ends: 1033 [2020-10-26 23:41:00,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:41:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2020-10-26 23:41:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 999. [2020-10-26 23:41:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2020-10-26 23:41:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1350 transitions. [2020-10-26 23:41:00,332 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1350 transitions. Word has length 130 [2020-10-26 23:41:00,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:00,341 INFO L481 AbstractCegarLoop]: Abstraction has 999 states and 1350 transitions. [2020-10-26 23:41:00,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:41:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1350 transitions. [2020-10-26 23:41:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-26 23:41:00,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:00,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:41:00,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:41:00,356 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash -80703662, now seen corresponding path program 1 times [2020-10-26 23:41:00,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:00,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466452083] [2020-10-26 23:41:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:00,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:01,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:02,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:02,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 23:41:02,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:41:02,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1662 [2020-10-26 23:41:02,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:41:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:41:02,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:02,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:02,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:02,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:02,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:02,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:02,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:41:02,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:02,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:02,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:02,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:02,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:02,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 23:41:02,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:02,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 23:41:02,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:02,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:02,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:02,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:41:02,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:41:02,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466452083] [2020-10-26 23:41:02,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:41:02,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:41:02,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009693962] [2020-10-26 23:41:02,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:41:02,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:02,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:41:02,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:41:02,486 INFO L87 Difference]: Start difference. First operand 999 states and 1350 transitions. Second operand 7 states. [2020-10-26 23:41:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:13,288 INFO L93 Difference]: Finished difference Result 2357 states and 3344 transitions. [2020-10-26 23:41:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:41:13,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 134 [2020-10-26 23:41:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:13,300 INFO L225 Difference]: With dead ends: 2357 [2020-10-26 23:41:13,300 INFO L226 Difference]: Without dead ends: 1671 [2020-10-26 23:41:13,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:41:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2020-10-26 23:41:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1335. [2020-10-26 23:41:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1335 states. [2020-10-26 23:41:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1725 transitions. [2020-10-26 23:41:13,354 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1725 transitions. Word has length 134 [2020-10-26 23:41:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:13,355 INFO L481 AbstractCegarLoop]: Abstraction has 1335 states and 1725 transitions. [2020-10-26 23:41:13,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:41:13,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1725 transitions. [2020-10-26 23:41:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-26 23:41:13,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:13,360 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:13,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:41:13,361 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:13,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:13,361 INFO L82 PathProgramCache]: Analyzing trace with hash 912649175, now seen corresponding path program 1 times [2020-10-26 23:41:13,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:13,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374017015] [2020-10-26 23:41:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:13,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:13,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:14,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:17,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:17,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 23:41:17,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:41:17,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3577 [2020-10-26 23:41:17,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:17,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:41:17,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:17,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:41:17,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:17,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:17,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:17,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:17,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:17,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:17,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 23:41:17,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:17,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:17,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:17,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:17,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:17,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:17,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:17,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:17,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:41:17,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:17,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-26 23:41:17,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:41:17,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:41:18,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374017015] [2020-10-26 23:41:18,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:41:18,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:41:18,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127790322] [2020-10-26 23:41:18,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:41:18,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:18,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:41:18,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:41:18,310 INFO L87 Difference]: Start difference. First operand 1335 states and 1725 transitions. Second operand 8 states. [2020-10-26 23:41:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:29,611 INFO L93 Difference]: Finished difference Result 3015 states and 3816 transitions. [2020-10-26 23:41:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:41:29,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 260 [2020-10-26 23:41:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:29,632 INFO L225 Difference]: With dead ends: 3015 [2020-10-26 23:41:29,632 INFO L226 Difference]: Without dead ends: 1686 [2020-10-26 23:41:29,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:41:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2020-10-26 23:41:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1644. [2020-10-26 23:41:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1644 states. [2020-10-26 23:41:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2043 transitions. [2020-10-26 23:41:29,701 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2043 transitions. Word has length 260 [2020-10-26 23:41:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:29,703 INFO L481 AbstractCegarLoop]: Abstraction has 1644 states and 2043 transitions. [2020-10-26 23:41:29,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:41:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2043 transitions. [2020-10-26 23:41:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-26 23:41:29,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:29,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:29,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:41:29,711 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:29,712 INFO L82 PathProgramCache]: Analyzing trace with hash 356585454, now seen corresponding path program 1 times [2020-10-26 23:41:29,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:29,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923738767] [2020-10-26 23:41:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:29,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:30,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:31,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:31,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-26 23:41:31,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:31,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2163 [2020-10-26 23:41:31,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:41:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 337 [2020-10-26 23:41:31,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:32,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:32,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:32,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:32,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:32,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:32,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:41:32,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:32,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:32,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:32,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:32,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:32,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:32,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:32,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:32,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:41:32,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:32,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-26 23:41:32,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-26 23:41:32,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:41:33,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923738767] [2020-10-26 23:41:33,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:33,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:41:33,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907485545] [2020-10-26 23:41:33,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:41:33,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:41:33,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:41:33,375 INFO L87 Difference]: Start difference. First operand 1644 states and 2043 transitions. Second operand 6 states. [2020-10-26 23:41:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:42,476 INFO L93 Difference]: Finished difference Result 3324 states and 4415 transitions. [2020-10-26 23:41:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:41:42,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-10-26 23:41:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:42,499 INFO L225 Difference]: With dead ends: 3324 [2020-10-26 23:41:42,499 INFO L226 Difference]: Without dead ends: 2620 [2020-10-26 23:41:42,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:41:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2020-10-26 23:41:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2594. [2020-10-26 23:41:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2594 states. [2020-10-26 23:41:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3131 transitions. [2020-10-26 23:41:42,595 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3131 transitions. Word has length 334 [2020-10-26 23:41:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:42,596 INFO L481 AbstractCegarLoop]: Abstraction has 2594 states and 3131 transitions. [2020-10-26 23:41:42,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:41:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3131 transitions. [2020-10-26 23:41:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-26 23:41:42,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:42,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:42,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:41:42,605 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash -983270742, now seen corresponding path program 1 times [2020-10-26 23:41:42,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:42,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264560385] [2020-10-26 23:41:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:42,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:42,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:43,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:43,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:46,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:47,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:47,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-26 23:41:47,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:41:47,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-26 23:41:47,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:47,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:41:47,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:47,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 360 [2020-10-26 23:41:47,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:47,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:47,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:47,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:47,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:47,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:47,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 23:41:47,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:47,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:48,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:48,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:48,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:48,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:41:48,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:48,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-26 23:41:48,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:48,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:48,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:48,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:41:48,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:48,512 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-10-26 23:41:48,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:41:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:48,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:49,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:49,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:49,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:41:49,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:49,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-10-26 23:41:49,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:49,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:41:49,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:49,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:41:49,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:41:50,411 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-26 23:41:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 13 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:41:52,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264560385] [2020-10-26 23:41:52,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:52,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:41:52,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715345966] [2020-10-26 23:41:52,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 23:41:52,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 23:41:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:41:52,047 INFO L87 Difference]: Start difference. First operand 2594 states and 3131 transitions. Second operand 12 states. [2020-10-26 23:41:52,363 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-26 23:41:54,097 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-10-26 23:41:54,816 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-26 23:41:55,144 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-26 23:41:56,682 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-26 23:41:57,225 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-26 23:41:57,931 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-10-26 23:41:58,210 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-26 23:41:58,529 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-26 23:41:59,986 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-26 23:42:03,107 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-26 23:42:07,678 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-26 23:42:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:09,706 INFO L93 Difference]: Finished difference Result 5348 states and 6723 transitions. [2020-10-26 23:42:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 23:42:09,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 355 [2020-10-26 23:42:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:09,733 INFO L225 Difference]: With dead ends: 5348 [2020-10-26 23:42:09,733 INFO L226 Difference]: Without dead ends: 4005 [2020-10-26 23:42:09,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 23:42:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2020-10-26 23:42:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3553. [2020-10-26 23:42:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3553 states. [2020-10-26 23:42:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 4365 transitions. [2020-10-26 23:42:09,886 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 4365 transitions. Word has length 355 [2020-10-26 23:42:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:09,887 INFO L481 AbstractCegarLoop]: Abstraction has 3553 states and 4365 transitions. [2020-10-26 23:42:09,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 23:42:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 4365 transitions. [2020-10-26 23:42:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-10-26 23:42:09,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:09,897 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:09,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:42:09,898 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash -224812702, now seen corresponding path program 1 times [2020-10-26 23:42:09,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:09,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968088892] [2020-10-26 23:42:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:10,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:10,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:12,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:12,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 433 [2020-10-26 23:42:12,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:42:12,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2141 [2020-10-26 23:42:12,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:12,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:12,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:42:12,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 23:42:12,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:12,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:12,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:12,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:12,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:12,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:12,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:42:12,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:12,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:12,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:12,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:12,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:12,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:12,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:12,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:42:12,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:12,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-26 23:42:12,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:12,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:12,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:12,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:42:12,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:13,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:42:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:13,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:13,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:13,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:42:13,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:13,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-26 23:42:13,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:13,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:13,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:13,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:42:13,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:42:13,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968088892] [2020-10-26 23:42:13,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:13,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:42:13,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754967031] [2020-10-26 23:42:13,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:42:13,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:13,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:42:13,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:42:13,467 INFO L87 Difference]: Start difference. First operand 3553 states and 4365 transitions. Second operand 7 states. [2020-10-26 23:42:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:26,295 INFO L93 Difference]: Finished difference Result 8156 states and 10538 transitions. [2020-10-26 23:42:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:42:26,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 419 [2020-10-26 23:42:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:26,322 INFO L225 Difference]: With dead ends: 8156 [2020-10-26 23:42:26,322 INFO L226 Difference]: Without dead ends: 5225 [2020-10-26 23:42:26,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:42:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2020-10-26 23:42:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 5167. [2020-10-26 23:42:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5167 states. [2020-10-26 23:42:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 6198 transitions. [2020-10-26 23:42:26,498 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 6198 transitions. Word has length 419 [2020-10-26 23:42:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:26,499 INFO L481 AbstractCegarLoop]: Abstraction has 5167 states and 6198 transitions. [2020-10-26 23:42:26,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:42:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 6198 transitions. [2020-10-26 23:42:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-10-26 23:42:26,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:26,510 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:42:26,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:42:26,511 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:26,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:26,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1180263462, now seen corresponding path program 1 times [2020-10-26 23:42:26,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:26,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356028997] [2020-10-26 23:42:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:26,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:26,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:27,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:28,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:30,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:31,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:31,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-10-26 23:42:31,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:42:31,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 23:42:31,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:31,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:31,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:42:31,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 23:42:31,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:31,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:31,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:31,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:31,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:31,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:31,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 23:42:31,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:31,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:31,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:31,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:32,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:32,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:42:32,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:32,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 23:42:32,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:32,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:32,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:32,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:42:32,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:32,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:42:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:32,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:32,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:32,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:42:32,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:42:32,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-26 23:42:32,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:32,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:32,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:42:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:33,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-26 23:42:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:33,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:33,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:33,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:42:33,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:33,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 23:42:33,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:33,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:33,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-26 23:42:33,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:33,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 252 proven. 84 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 23:42:33,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356028997] [2020-10-26 23:42:33,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:33,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:42:33,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813706095] [2020-10-26 23:42:33,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:42:33,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:33,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:42:33,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:42:33,845 INFO L87 Difference]: Start difference. First operand 5167 states and 6198 transitions. Second operand 6 states. [2020-10-26 23:42:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:43,750 INFO L93 Difference]: Finished difference Result 9572 states and 11584 transitions. [2020-10-26 23:42:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:42:43,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 440 [2020-10-26 23:42:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:43,777 INFO L225 Difference]: With dead ends: 9572 [2020-10-26 23:42:43,777 INFO L226 Difference]: Without dead ends: 5219 [2020-10-26 23:42:43,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 23:42:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5219 states. [2020-10-26 23:42:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5219 to 5167. [2020-10-26 23:42:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5167 states. [2020-10-26 23:42:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 6168 transitions. [2020-10-26 23:42:43,944 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 6168 transitions. Word has length 440 [2020-10-26 23:42:43,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:43,945 INFO L481 AbstractCegarLoop]: Abstraction has 5167 states and 6168 transitions. [2020-10-26 23:42:43,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:42:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 6168 transitions. [2020-10-26 23:42:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-10-26 23:42:43,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:43,952 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:43,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:42:43,952 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1498994720, now seen corresponding path program 1 times [2020-10-26 23:42:43,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:43,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743064519] [2020-10-26 23:42:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:44,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:44,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:46,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:46,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 459 [2020-10-26 23:42:46,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:42:46,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2668 [2020-10-26 23:42:46,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:42:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:42:46,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:46,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:46,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:46,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:46,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:46,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:42:46,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:46,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:46,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:46,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:47,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:47,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:47,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:42:47,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:47,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-26 23:42:47,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:47,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:47,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:47,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:42:47,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:47,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:42:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:47,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:47,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:47,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:42:47,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:47,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-26 23:42:47,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:42:47,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 212 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:42:48,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743064519] [2020-10-26 23:42:48,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:48,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:42:48,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187099474] [2020-10-26 23:42:48,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:42:48,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:48,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:42:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:42:48,175 INFO L87 Difference]: Start difference. First operand 5167 states and 6168 transitions. Second operand 7 states. [2020-10-26 23:43:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:03,026 INFO L93 Difference]: Finished difference Result 12933 states and 15412 transitions. [2020-10-26 23:43:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:43:03,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 445 [2020-10-26 23:43:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:03,104 INFO L225 Difference]: With dead ends: 12933 [2020-10-26 23:43:03,105 INFO L226 Difference]: Without dead ends: 8079 [2020-10-26 23:43:03,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:43:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2020-10-26 23:43:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7700. [2020-10-26 23:43:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7700 states. [2020-10-26 23:43:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7700 states to 7700 states and 8948 transitions. [2020-10-26 23:43:03,344 INFO L78 Accepts]: Start accepts. Automaton has 7700 states and 8948 transitions. Word has length 445 [2020-10-26 23:43:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:03,345 INFO L481 AbstractCegarLoop]: Abstraction has 7700 states and 8948 transitions. [2020-10-26 23:43:03,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:43:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 7700 states and 8948 transitions. [2020-10-26 23:43:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-10-26 23:43:03,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:03,353 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:03,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:43:03,353 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:03,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:03,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1662177624, now seen corresponding path program 1 times [2020-10-26 23:43:03,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:03,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414224397] [2020-10-26 23:43:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:03,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:04,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:04,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 471 [2020-10-26 23:43:04,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:04,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-26 23:43:04,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:43:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 23:43:04,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:04,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:43:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:04,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:04,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:04,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:43:04,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:04,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:43:04,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:04,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:04,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:04,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:04,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:04,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:43:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:04,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:04,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:04,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:43:04,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:04,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 23:43:04,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:04,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:04,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:04,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:04,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:04,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:43:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:04,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:04,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:04,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:43:04,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:04,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 23:43:04,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:04,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:43:04,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:04,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:43:04,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 23:43:05,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414224397] [2020-10-26 23:43:05,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:43:05,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:43:05,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99386590] [2020-10-26 23:43:05,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:43:05,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:43:05,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:43:05,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:43:05,109 INFO L87 Difference]: Start difference. First operand 7700 states and 8948 transitions. Second operand 5 states. [2020-10-26 23:43:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:16,364 INFO L93 Difference]: Finished difference Result 16353 states and 19655 transitions. [2020-10-26 23:43:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:43:16,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 457 [2020-10-26 23:43:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:16,407 INFO L225 Difference]: With dead ends: 16353 [2020-10-26 23:43:16,408 INFO L226 Difference]: Without dead ends: 9277 [2020-10-26 23:43:16,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:43:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9277 states. [2020-10-26 23:43:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9277 to 9262. [2020-10-26 23:43:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9262 states. [2020-10-26 23:43:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9262 states to 9262 states and 10754 transitions. [2020-10-26 23:43:16,642 INFO L78 Accepts]: Start accepts. Automaton has 9262 states and 10754 transitions. Word has length 457 [2020-10-26 23:43:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:16,644 INFO L481 AbstractCegarLoop]: Abstraction has 9262 states and 10754 transitions. [2020-10-26 23:43:16,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:43:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 9262 states and 10754 transitions. [2020-10-26 23:43:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2020-10-26 23:43:16,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:16,655 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:16,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:43:16,655 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:16,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash -60415380, now seen corresponding path program 1 times [2020-10-26 23:43:16,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:16,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823416654] [2020-10-26 23:43:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:16,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:17,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:17,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:20,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:21,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:21,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 564 [2020-10-26 23:43:21,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:43:21,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 23:43:21,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:43:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:43:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:43:21,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:22,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:43:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:22,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:22,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:22,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:43:22,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:22,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:43:22,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:22,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:22,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:43:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:22,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:22,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:22,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:43:22,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:22,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 23:43:22,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:43:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:22,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:43:22,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:22,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:43:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:22,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:22,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:22,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:43:22,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-26 23:43:22,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:22,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:43:22,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:43:22,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:43:22,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:22,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:43:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:23,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:23,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:43:23,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:43:23,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-26 23:43:23,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:43:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:43:23,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 354 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 23:43:23,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823416654] [2020-10-26 23:43:23,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:43:23,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 23:43:23,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443534944] [2020-10-26 23:43:23,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 23:43:23,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:43:23,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 23:43:23,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-26 23:43:23,505 INFO L87 Difference]: Start difference. First operand 9262 states and 10754 transitions. Second operand 9 states. [2020-10-26 23:43:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:47,357 INFO L93 Difference]: Finished difference Result 26464 states and 32266 transitions. [2020-10-26 23:43:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 23:43:47,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 548 [2020-10-26 23:43:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:47,431 INFO L225 Difference]: With dead ends: 26464 [2020-10-26 23:43:47,432 INFO L226 Difference]: Without dead ends: 17826 [2020-10-26 23:43:47,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-26 23:43:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17826 states. [2020-10-26 23:43:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17826 to 17452. [2020-10-26 23:43:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17452 states. [2020-10-26 23:43:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17452 states to 17452 states and 20592 transitions. [2020-10-26 23:43:47,966 INFO L78 Accepts]: Start accepts. Automaton has 17452 states and 20592 transitions. Word has length 548 [2020-10-26 23:43:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:47,968 INFO L481 AbstractCegarLoop]: Abstraction has 17452 states and 20592 transitions. [2020-10-26 23:43:47,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 23:43:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 17452 states and 20592 transitions. [2020-10-26 23:43:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-10-26 23:43:47,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:47,982 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:47,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:43:47,983 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash 129035201, now seen corresponding path program 1 times [2020-10-26 23:43:47,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:47,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825771518] [2020-10-26 23:43:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:48,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:48,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:48,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:50,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:52,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:53,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:53,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 601 [2020-10-26 23:43:53,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:43:53,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 23:43:53,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:53,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:53,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:43:53,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 23:43:53,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:53,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:43:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:53,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:53,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:53,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:43:53,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:53,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 23:43:53,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:53,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:53,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:53,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:53,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:53,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:43:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:53,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:53,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:53,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:43:53,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:53,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 23:43:53,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:53,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:43:53,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:43:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:53,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:53,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:53,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:43:53,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:53,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 23:43:53,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:53,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:43:53,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:53,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:43:53,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:53,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:43:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:53,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:53,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:54,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:54,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 23:43:54,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:43:54,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-26 23:43:54,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:54,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:54,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:43:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 23:43:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 392 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:43:54,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825771518] [2020-10-26 23:43:54,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:43:54,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:43:54,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754560376] [2020-10-26 23:43:54,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:43:54,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:43:54,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:43:54,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:43:54,369 INFO L87 Difference]: Start difference. First operand 17452 states and 20592 transitions. Second operand 7 states. [2020-10-26 23:44:10,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:44:10,233 INFO L93 Difference]: Finished difference Result 38463 states and 46985 transitions. [2020-10-26 23:44:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:44:10,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 585 [2020-10-26 23:44:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:44:10,292 INFO L225 Difference]: With dead ends: 38463 [2020-10-26 23:44:10,292 INFO L226 Difference]: Without dead ends: 22237 [2020-10-26 23:44:10,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:44:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22237 states. [2020-10-26 23:44:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22237 to 20350. [2020-10-26 23:44:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20350 states. [2020-10-26 23:44:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20350 states to 20350 states and 24119 transitions. [2020-10-26 23:44:10,779 INFO L78 Accepts]: Start accepts. Automaton has 20350 states and 24119 transitions. Word has length 585 [2020-10-26 23:44:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:44:10,780 INFO L481 AbstractCegarLoop]: Abstraction has 20350 states and 24119 transitions. [2020-10-26 23:44:10,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:44:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 20350 states and 24119 transitions. [2020-10-26 23:44:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2020-10-26 23:44:10,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:44:10,794 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:10,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:44:10,794 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:44:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:44:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1241886357, now seen corresponding path program 1 times [2020-10-26 23:44:10,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:44:10,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737464759] [2020-10-26 23:44:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:44:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:11,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:11,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking...