/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/bitvector/s3_srvr_2a_alt.BV.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:00:56,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:00:56,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:00:56,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:00:56,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:00:56,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:00:56,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:00:56,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:00:56,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:00:56,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:00:56,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:00:56,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:00:56,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:00:56,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:00:56,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:00:56,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:00:56,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:00:56,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:00:56,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:00:56,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:00:56,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:00:56,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:00:56,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:00:56,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:00:56,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:00:56,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:00:56,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:00:56,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:00:56,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:00:56,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:00:56,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:00:56,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:00:56,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:00:56,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:00:56,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:00:56,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:00:56,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:00:56,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:00:56,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:00:56,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:00:56,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:00:56,590 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 20:00:56,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:00:56,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:00:56,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:00:56,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:00:56,647 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:00:56,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:00:56,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:00:56,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:00:56,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:00:56,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:00:56,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:00:56,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:00:56,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:00:56,650 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:00:56,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:00:56,650 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:00:56,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:00:56,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:00:56,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:00:56,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:00:56,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:00:56,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:00:56,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:00:56,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:00:56,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:00:56,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:00:56,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:00:56,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:00:56,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:00:56,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:00:57,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:00:57,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:00:57,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:00:57,076 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:00:57,077 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:00:57,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_srvr_2a_alt.BV.c.cil.c [2020-10-26 20:00:57,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72aa93634/fbb5b256e7e24fdbb760a1dd6850268e/FLAG11b0003c2 [2020-10-26 20:00:57,857 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:00:57,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/s3_srvr_2a_alt.BV.c.cil.c [2020-10-26 20:00:57,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72aa93634/fbb5b256e7e24fdbb760a1dd6850268e/FLAG11b0003c2 [2020-10-26 20:00:58,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72aa93634/fbb5b256e7e24fdbb760a1dd6850268e [2020-10-26 20:00:58,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:00:58,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:00:58,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:00:58,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:00:58,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:00:58,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:00:58" (1/1) ... [2020-10-26 20:00:58,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34da7b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58, skipping insertion in model container [2020-10-26 20:00:58,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:00:58" (1/1) ... [2020-10-26 20:00:58,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:00:58,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:00:58,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:00:58,546 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:00:58,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:00:58,637 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:00:58,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58 WrapperNode [2020-10-26 20:00:58,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:00:58,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:00:58,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:00:58,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:00:58,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58" (1/1) ... [2020-10-26 20:00:58,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58" (1/1) ... [2020-10-26 20:00:58,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58" (1/1) ... [2020-10-26 20:00:58,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58" (1/1) ... [2020-10-26 20:00:58,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58" (1/1) ... [2020-10-26 20:00:58,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58" (1/1) ... [2020-10-26 20:00:58,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58" (1/1) ... [2020-10-26 20:00:58,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:00:58,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:00:58,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:00:58,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:00:58,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58" (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 20:00:58,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:00:58,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:00:58,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:00:58,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-10-26 20:00:58,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:00:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:00:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:00:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:00:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:00:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-26 20:00:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:00:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-26 20:00:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-10-26 20:00:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:00:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:00:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:00:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:00:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:00:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:00:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:00:59,053 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-26 20:00:59,585 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-10-26 20:00:59,585 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-10-26 20:00:59,621 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:00:59,621 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:00:59,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:00:59 BoogieIcfgContainer [2020-10-26 20:00:59,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:00:59,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:00:59,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:00:59,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:00:59,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:00:58" (1/3) ... [2020-10-26 20:00:59,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27025c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:00:59, skipping insertion in model container [2020-10-26 20:00:59,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:58" (2/3) ... [2020-10-26 20:00:59,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27025c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:00:59, skipping insertion in model container [2020-10-26 20:00:59,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:00:59" (3/3) ... [2020-10-26 20:00:59,634 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_2a_alt.BV.c.cil.c [2020-10-26 20:00:59,649 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:00:59,656 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:00:59,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:00:59,705 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:00:59,705 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:00:59,705 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:00:59,706 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:00:59,706 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:00:59,706 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:00:59,706 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:00:59,706 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:00:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states. [2020-10-26 20:00:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 20:00:59,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:59,741 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] [2020-10-26 20:00:59,742 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:59,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2139538990, now seen corresponding path program 1 times [2020-10-26 20:00:59,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:59,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124943673] [2020-10-26 20:00:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:00,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:00,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:00,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:00,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:00,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 20:01:00,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:00,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-10-26 20:01:00,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:00,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:00,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:00,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:01:00,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:01:00,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:00,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:00,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:00,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:00,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:00,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:01:00,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:00,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:00,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:00,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:00,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:00,948 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 20:01:00,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124943673] [2020-10-26 20:01:00,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:00,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:01:00,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122363589] [2020-10-26 20:01:00,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:00,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:00,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:00,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:00,975 INFO L87 Difference]: Start difference. First operand 151 states. Second operand 6 states. [2020-10-26 20:01:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:01,932 INFO L93 Difference]: Finished difference Result 331 states and 564 transitions. [2020-10-26 20:01:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:01:01,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-26 20:01:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:01,947 INFO L225 Difference]: With dead ends: 331 [2020-10-26 20:01:01,947 INFO L226 Difference]: Without dead ends: 167 [2020-10-26 20:01:01,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:01:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-26 20:01:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2020-10-26 20:01:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-26 20:01:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 255 transitions. [2020-10-26 20:01:02,016 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 255 transitions. Word has length 51 [2020-10-26 20:01:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:02,017 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 255 transitions. [2020-10-26 20:01:02,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 255 transitions. [2020-10-26 20:01:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 20:01:02,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:02,020 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] [2020-10-26 20:01:02,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:01:02,021 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1683086567, now seen corresponding path program 1 times [2020-10-26 20:01:02,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:02,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592466328] [2020-10-26 20:01:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:02,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:02,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:02,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:02,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:02,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 20:01:02,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:02,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-26 20:01:02,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:02,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:02,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:02,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:01:02,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:02,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:02,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:02,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:02,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:02,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:02,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:01:02,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:02,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:02,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:02,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:02,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:02,657 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 20:01:02,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592466328] [2020-10-26 20:01:02,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:02,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:01:02,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347458643] [2020-10-26 20:01:02,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:02,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:02,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:02,662 INFO L87 Difference]: Start difference. First operand 163 states and 255 transitions. Second operand 6 states. [2020-10-26 20:01:03,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:03,353 INFO L93 Difference]: Finished difference Result 326 states and 511 transitions. [2020-10-26 20:01:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:01:03,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-26 20:01:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:03,357 INFO L225 Difference]: With dead ends: 326 [2020-10-26 20:01:03,357 INFO L226 Difference]: Without dead ends: 177 [2020-10-26 20:01:03,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:01:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-26 20:01:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-10-26 20:01:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 20:01:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 266 transitions. [2020-10-26 20:01:03,381 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 266 transitions. Word has length 52 [2020-10-26 20:01:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:03,382 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 266 transitions. [2020-10-26 20:01:03,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 266 transitions. [2020-10-26 20:01:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 20:01:03,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:03,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:03,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:01:03,386 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:03,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1492737295, now seen corresponding path program 1 times [2020-10-26 20:01:03,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:03,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062436460] [2020-10-26 20:01:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:03,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:03,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:03,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 20:01:03,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:03,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-26 20:01:03,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-26 20:01:03,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 20:01:03,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:01:03,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:03,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:03,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:03,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:03,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:03,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:03,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:03,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:03,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:03,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062436460] [2020-10-26 20:01:03,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:03,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:03,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730231625] [2020-10-26 20:01:03,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:03,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:03,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:03,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:03,613 INFO L87 Difference]: Start difference. First operand 174 states and 266 transitions. Second operand 4 states. [2020-10-26 20:01:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:03,997 INFO L93 Difference]: Finished difference Result 469 states and 738 transitions. [2020-10-26 20:01:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:03,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-26 20:01:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:04,001 INFO L225 Difference]: With dead ends: 469 [2020-10-26 20:01:04,001 INFO L226 Difference]: Without dead ends: 320 [2020-10-26 20:01:04,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-26 20:01:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2020-10-26 20:01:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-26 20:01:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 498 transitions. [2020-10-26 20:01:04,051 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 498 transitions. Word has length 67 [2020-10-26 20:01:04,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:04,053 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 498 transitions. [2020-10-26 20:01:04,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:04,053 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 498 transitions. [2020-10-26 20:01:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 20:01:04,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:04,064 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:04,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:01:04,065 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash -473005025, now seen corresponding path program 1 times [2020-10-26 20:01:04,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:04,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403961311] [2020-10-26 20:01:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:04,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:04,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:04,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:04,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:04,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 20:01:04,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:04,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-26 20:01:04,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:04,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:04,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-26 20:01:04,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:01:04,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:04,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:04,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:04,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:04,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:04,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:01:04,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:04,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:04,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:04,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:04,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:01:04,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403961311] [2020-10-26 20:01:04,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:04,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:04,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065859557] [2020-10-26 20:01:04,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:04,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:04,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:04,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:04,530 INFO L87 Difference]: Start difference. First operand 320 states and 498 transitions. Second operand 4 states. [2020-10-26 20:01:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:04,930 INFO L93 Difference]: Finished difference Result 761 states and 1202 transitions. [2020-10-26 20:01:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:04,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-26 20:01:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:04,936 INFO L225 Difference]: With dead ends: 761 [2020-10-26 20:01:04,936 INFO L226 Difference]: Without dead ends: 466 [2020-10-26 20:01:04,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-26 20:01:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2020-10-26 20:01:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-26 20:01:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 731 transitions. [2020-10-26 20:01:04,975 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 731 transitions. Word has length 89 [2020-10-26 20:01:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:04,976 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 731 transitions. [2020-10-26 20:01:04,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 731 transitions. [2020-10-26 20:01:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 20:01:04,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:04,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-10-26 20:01:04,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:01:04,979 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:04,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:04,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1471882461, now seen corresponding path program 1 times [2020-10-26 20:01:04,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:04,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508684669] [2020-10-26 20:01:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:05,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:05,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:05,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 20:01:05,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:05,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 20:01:05,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:05,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:05,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-26 20:01:05,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 20:01:05,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:05,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:05,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:05,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:05,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:05,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:05,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:05,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:05,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:05,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-26 20:01:05,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508684669] [2020-10-26 20:01:05,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:05,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:05,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087859594] [2020-10-26 20:01:05,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:05,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:05,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:05,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:05,182 INFO L87 Difference]: Start difference. First operand 466 states and 731 transitions. Second operand 4 states. [2020-10-26 20:01:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:05,572 INFO L93 Difference]: Finished difference Result 615 states and 968 transitions. [2020-10-26 20:01:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:05,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-26 20:01:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:05,579 INFO L225 Difference]: With dead ends: 615 [2020-10-26 20:01:05,579 INFO L226 Difference]: Without dead ends: 612 [2020-10-26 20:01:05,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-10-26 20:01:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2020-10-26 20:01:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-10-26 20:01:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 965 transitions. [2020-10-26 20:01:05,626 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 965 transitions. Word has length 128 [2020-10-26 20:01:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:05,627 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 965 transitions. [2020-10-26 20:01:05,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 965 transitions. [2020-10-26 20:01:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-26 20:01:05,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:05,631 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2020-10-26 20:01:05,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:01:05,631 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:05,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1633966217, now seen corresponding path program 1 times [2020-10-26 20:01:05,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:05,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455885282] [2020-10-26 20:01:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:05,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:05,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:05,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:05,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-26 20:01:05,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:05,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-26 20:01:05,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:05,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:05,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-26 20:01:05,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:01:05,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:05,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:05,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:05,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:05,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:05,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:05,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:01:05,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:06,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-26 20:01:06,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455885282] [2020-10-26 20:01:06,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:06,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:06,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118293805] [2020-10-26 20:01:06,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:06,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:06,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:06,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:06,031 INFO L87 Difference]: Start difference. First operand 612 states and 965 transitions. Second operand 4 states. [2020-10-26 20:01:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:06,514 INFO L93 Difference]: Finished difference Result 1371 states and 2205 transitions. [2020-10-26 20:01:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:06,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-10-26 20:01:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:06,526 INFO L225 Difference]: With dead ends: 1371 [2020-10-26 20:01:06,526 INFO L226 Difference]: Without dead ends: 784 [2020-10-26 20:01:06,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-10-26 20:01:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 776. [2020-10-26 20:01:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-10-26 20:01:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1149 transitions. [2020-10-26 20:01:06,577 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1149 transitions. Word has length 151 [2020-10-26 20:01:06,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:06,578 INFO L481 AbstractCegarLoop]: Abstraction has 776 states and 1149 transitions. [2020-10-26 20:01:06,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1149 transitions. [2020-10-26 20:01:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 20:01:06,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:06,582 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:01:06,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:01:06,583 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:06,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1445859277, now seen corresponding path program 1 times [2020-10-26 20:01:06,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:06,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716651866] [2020-10-26 20:01:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:06,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:06,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:06,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:07,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 20:01:07,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:01:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-26 20:01:07,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-26 20:01:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:01:07,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:07,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:07,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:07,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:07,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:07,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:07,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:07,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:07,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:07,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:07,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-26 20:01:07,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716651866] [2020-10-26 20:01:07,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:07,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:07,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945054051] [2020-10-26 20:01:07,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:07,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:07,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:07,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:07,318 INFO L87 Difference]: Start difference. First operand 776 states and 1149 transitions. Second operand 4 states. [2020-10-26 20:01:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:07,749 INFO L93 Difference]: Finished difference Result 2276 states and 3388 transitions. [2020-10-26 20:01:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:07,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 193 [2020-10-26 20:01:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:07,760 INFO L225 Difference]: With dead ends: 2276 [2020-10-26 20:01:07,760 INFO L226 Difference]: Without dead ends: 1525 [2020-10-26 20:01:07,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2020-10-26 20:01:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1524. [2020-10-26 20:01:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1524 states. [2020-10-26 20:01:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2255 transitions. [2020-10-26 20:01:07,845 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2255 transitions. Word has length 193 [2020-10-26 20:01:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:07,845 INFO L481 AbstractCegarLoop]: Abstraction has 1524 states and 2255 transitions. [2020-10-26 20:01:07,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2255 transitions. [2020-10-26 20:01:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 20:01:07,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:07,851 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:01:07,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:01:07,851 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:07,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:07,852 INFO L82 PathProgramCache]: Analyzing trace with hash -713891851, now seen corresponding path program 1 times [2020-10-26 20:01:07,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:07,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743635513] [2020-10-26 20:01:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:07,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:08,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:08,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:08,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 20:01:08,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:08,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-26 20:01:08,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 134 [2020-10-26 20:01:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:01:08,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:08,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:08,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:08,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:08,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:08,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:01:08,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:08,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 20:01:08,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743635513] [2020-10-26 20:01:08,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:08,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:08,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994005285] [2020-10-26 20:01:08,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:08,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:08,276 INFO L87 Difference]: Start difference. First operand 1524 states and 2255 transitions. Second operand 4 states. [2020-10-26 20:01:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:08,831 INFO L93 Difference]: Finished difference Result 3367 states and 5081 transitions. [2020-10-26 20:01:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:08,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 193 [2020-10-26 20:01:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:08,842 INFO L225 Difference]: With dead ends: 3367 [2020-10-26 20:01:08,843 INFO L226 Difference]: Without dead ends: 1772 [2020-10-26 20:01:08,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2020-10-26 20:01:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1772. [2020-10-26 20:01:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1772 states. [2020-10-26 20:01:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2543 transitions. [2020-10-26 20:01:08,940 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2543 transitions. Word has length 193 [2020-10-26 20:01:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:08,941 INFO L481 AbstractCegarLoop]: Abstraction has 1772 states and 2543 transitions. [2020-10-26 20:01:08,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2543 transitions. [2020-10-26 20:01:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 20:01:08,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:08,948 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:01:08,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:01:08,948 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash 118181392, now seen corresponding path program 1 times [2020-10-26 20:01:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:08,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774219721] [2020-10-26 20:01:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:08,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:09,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:09,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:09,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:09,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:01:09,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:09,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-26 20:01:09,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:09,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 20:01:09,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 135 [2020-10-26 20:01:09,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:01:09,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:09,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:09,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:09,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:09,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:09,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:09,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:01:09,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:09,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:09,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:09,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:09,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 286 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 20:01:09,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774219721] [2020-10-26 20:01:09,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:09,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:01:09,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581677049] [2020-10-26 20:01:09,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:01:09,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:09,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:01:09,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:09,651 INFO L87 Difference]: Start difference. First operand 1772 states and 2543 transitions. Second operand 5 states. [2020-10-26 20:01:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:10,625 INFO L93 Difference]: Finished difference Result 4396 states and 6378 transitions. [2020-10-26 20:01:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:01:10,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2020-10-26 20:01:10,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:10,635 INFO L225 Difference]: With dead ends: 4396 [2020-10-26 20:01:10,636 INFO L226 Difference]: Without dead ends: 1669 [2020-10-26 20:01:10,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:01:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2020-10-26 20:01:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1538. [2020-10-26 20:01:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2020-10-26 20:01:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2111 transitions. [2020-10-26 20:01:10,723 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2111 transitions. Word has length 221 [2020-10-26 20:01:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:10,724 INFO L481 AbstractCegarLoop]: Abstraction has 1538 states and 2111 transitions. [2020-10-26 20:01:10,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:01:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2111 transitions. [2020-10-26 20:01:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 20:01:10,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:10,730 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:01:10,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:01:10,730 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash -895018740, now seen corresponding path program 1 times [2020-10-26 20:01:10,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:10,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604420213] [2020-10-26 20:01:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:10,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:10,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:10,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:10,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:11,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:11,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:11,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:11,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:01:11,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:01:11,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-26 20:01:11,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:11,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:11,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-26 20:01:11,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-26 20:01:11,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:11,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:11,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:11,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:11,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:11,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:11,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:11,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:11,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:11,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:11,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-26 20:01:11,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604420213] [2020-10-26 20:01:11,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:11,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409225491] [2020-10-26 20:01:11,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:11,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:11,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:11,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:11,949 INFO L87 Difference]: Start difference. First operand 1538 states and 2111 transitions. Second operand 4 states. [2020-10-26 20:01:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:12,314 INFO L93 Difference]: Finished difference Result 1795 states and 2465 transitions. [2020-10-26 20:01:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:12,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2020-10-26 20:01:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:12,323 INFO L225 Difference]: With dead ends: 1795 [2020-10-26 20:01:12,323 INFO L226 Difference]: Without dead ends: 1302 [2020-10-26 20:01:12,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2020-10-26 20:01:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1048. [2020-10-26 20:01:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2020-10-26 20:01:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1449 transitions. [2020-10-26 20:01:12,379 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1449 transitions. Word has length 221 [2020-10-26 20:01:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:12,380 INFO L481 AbstractCegarLoop]: Abstraction has 1048 states and 1449 transitions. [2020-10-26 20:01:12,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1449 transitions. [2020-10-26 20:01:12,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 20:01:12,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:12,386 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:01:12,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:01:12,386 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:12,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1350560714, now seen corresponding path program 1 times [2020-10-26 20:01:12,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:12,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274769663] [2020-10-26 20:01:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:12,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:12,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:12,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:12,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:13,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:13,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:13,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:01:13,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:01:13,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-26 20:01:13,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-26 20:01:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 20:01:13,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:13,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:13,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:13,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:13,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:13,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:13,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:13,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:13,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:13,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-26 20:01:13,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274769663] [2020-10-26 20:01:13,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:13,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:13,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114689512] [2020-10-26 20:01:13,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:13,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:13,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:13,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:13,541 INFO L87 Difference]: Start difference. First operand 1048 states and 1449 transitions. Second operand 4 states. [2020-10-26 20:01:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:14,012 INFO L93 Difference]: Finished difference Result 2255 states and 3185 transitions. [2020-10-26 20:01:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:14,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2020-10-26 20:01:14,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:14,020 INFO L225 Difference]: With dead ends: 2255 [2020-10-26 20:01:14,020 INFO L226 Difference]: Without dead ends: 1184 [2020-10-26 20:01:14,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2020-10-26 20:01:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1140. [2020-10-26 20:01:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1140 states. [2020-10-26 20:01:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1597 transitions. [2020-10-26 20:01:14,084 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1597 transitions. Word has length 221 [2020-10-26 20:01:14,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:14,085 INFO L481 AbstractCegarLoop]: Abstraction has 1140 states and 1597 transitions. [2020-10-26 20:01:14,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:14,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1597 transitions. [2020-10-26 20:01:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-26 20:01:14,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:14,091 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-26 20:01:14,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:01:14,092 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:14,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:14,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1077966287, now seen corresponding path program 1 times [2020-10-26 20:01:14,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:14,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518172486] [2020-10-26 20:01:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:14,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:14,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:14,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:14,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:14,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:14,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:17,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:19,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:19,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-26 20:01:19,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:01:19,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 20:01:19,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:19,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:19,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:01:19,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-26 20:01:19,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:19,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:19,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:19,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:19,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:19,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:19,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:19,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:19,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:19,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:19,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 146 proven. 196 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-26 20:01:19,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518172486] [2020-10-26 20:01:19,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:19,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:01:19,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725212511] [2020-10-26 20:01:19,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:19,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:19,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:19,827 INFO L87 Difference]: Start difference. First operand 1140 states and 1597 transitions. Second operand 6 states. [2020-10-26 20:01:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:21,555 INFO L93 Difference]: Finished difference Result 3869 states and 5497 transitions. [2020-10-26 20:01:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:01:21,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 252 [2020-10-26 20:01:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:21,571 INFO L225 Difference]: With dead ends: 3869 [2020-10-26 20:01:21,572 INFO L226 Difference]: Without dead ends: 2750 [2020-10-26 20:01:21,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:01:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-10-26 20:01:21,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2504. [2020-10-26 20:01:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2504 states. [2020-10-26 20:01:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 3515 transitions. [2020-10-26 20:01:21,722 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 3515 transitions. Word has length 252 [2020-10-26 20:01:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:21,723 INFO L481 AbstractCegarLoop]: Abstraction has 2504 states and 3515 transitions. [2020-10-26 20:01:21,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 3515 transitions. [2020-10-26 20:01:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 20:01:21,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:21,733 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:01:21,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:01:21,734 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1183006630, now seen corresponding path program 1 times [2020-10-26 20:01:21,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:21,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256736980] [2020-10-26 20:01:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:21,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:21,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:21,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:22,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:22,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:22,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 20:01:22,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:01:22,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 825 [2020-10-26 20:01:22,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:22,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:22,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-26 20:01:22,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:01:22,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:22,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:22,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:22,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:22,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:22,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:22,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:22,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:22,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-26 20:01:22,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256736980] [2020-10-26 20:01:22,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:22,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:22,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282590414] [2020-10-26 20:01:22,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:22,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:22,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:22,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:22,708 INFO L87 Difference]: Start difference. First operand 2504 states and 3515 transitions. Second operand 4 states. [2020-10-26 20:01:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:23,254 INFO L93 Difference]: Finished difference Result 5423 states and 7761 transitions. [2020-10-26 20:01:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:23,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-10-26 20:01:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:23,273 INFO L225 Difference]: With dead ends: 5423 [2020-10-26 20:01:23,273 INFO L226 Difference]: Without dead ends: 2848 [2020-10-26 20:01:23,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2020-10-26 20:01:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2704. [2020-10-26 20:01:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-10-26 20:01:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3843 transitions. [2020-10-26 20:01:23,435 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3843 transitions. Word has length 261 [2020-10-26 20:01:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:23,436 INFO L481 AbstractCegarLoop]: Abstraction has 2704 states and 3843 transitions. [2020-10-26 20:01:23,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3843 transitions. [2020-10-26 20:01:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 20:01:23,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:23,446 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-26 20:01:23,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:01:23,446 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:23,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:23,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1406817503, now seen corresponding path program 1 times [2020-10-26 20:01:23,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:23,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108766861] [2020-10-26 20:01:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:23,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:24,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:27,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:27,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:28,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:28,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 20:01:28,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:01:28,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 20:01:28,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:01:28,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-26 20:01:28,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:28,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:28,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:28,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:28,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:28,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:28,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:28,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:28,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 219 proven. 174 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2020-10-26 20:01:29,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108766861] [2020-10-26 20:01:29,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:29,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:01:29,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710601710] [2020-10-26 20:01:29,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:29,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:29,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:29,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:29,327 INFO L87 Difference]: Start difference. First operand 2704 states and 3843 transitions. Second operand 6 states. [2020-10-26 20:01:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:30,809 INFO L93 Difference]: Finished difference Result 6806 states and 9685 transitions. [2020-10-26 20:01:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:01:30,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 272 [2020-10-26 20:01:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:30,831 INFO L225 Difference]: With dead ends: 6806 [2020-10-26 20:01:30,831 INFO L226 Difference]: Without dead ends: 4119 [2020-10-26 20:01:30,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:01:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2020-10-26 20:01:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 4080. [2020-10-26 20:01:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4080 states. [2020-10-26 20:01:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 5817 transitions. [2020-10-26 20:01:31,086 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 5817 transitions. Word has length 272 [2020-10-26 20:01:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:31,087 INFO L481 AbstractCegarLoop]: Abstraction has 4080 states and 5817 transitions. [2020-10-26 20:01:31,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 5817 transitions. [2020-10-26 20:01:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-26 20:01:31,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:31,101 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:01:31,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:01:31,101 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:31,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1881245707, now seen corresponding path program 1 times [2020-10-26 20:01:31,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:31,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534491986] [2020-10-26 20:01:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:31,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:31,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:31,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:31,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:31,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:31,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:32,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:32,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:33,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:33,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-26 20:01:33,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:01:33,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2100 [2020-10-26 20:01:33,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-26 20:01:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:01:33,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:33,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:33,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:33,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:33,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:33,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:33,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:33,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:33,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:33,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:33,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:33,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2020-10-26 20:01:33,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534491986] [2020-10-26 20:01:33,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:33,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:33,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880422549] [2020-10-26 20:01:33,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:33,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:33,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:33,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:33,365 INFO L87 Difference]: Start difference. First operand 4080 states and 5817 transitions. Second operand 4 states. [2020-10-26 20:01:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:33,933 INFO L93 Difference]: Finished difference Result 8527 states and 12173 transitions. [2020-10-26 20:01:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:33,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 276 [2020-10-26 20:01:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:33,958 INFO L225 Difference]: With dead ends: 8527 [2020-10-26 20:01:33,958 INFO L226 Difference]: Without dead ends: 4376 [2020-10-26 20:01:33,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2020-10-26 20:01:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 4356. [2020-10-26 20:01:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4356 states. [2020-10-26 20:01:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 5937 transitions. [2020-10-26 20:01:34,226 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 5937 transitions. Word has length 276 [2020-10-26 20:01:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:34,226 INFO L481 AbstractCegarLoop]: Abstraction has 4356 states and 5937 transitions. [2020-10-26 20:01:34,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 5937 transitions. [2020-10-26 20:01:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-26 20:01:34,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:34,239 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:01:34,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:01:34,240 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:34,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:34,240 INFO L82 PathProgramCache]: Analyzing trace with hash -573746734, now seen corresponding path program 1 times [2020-10-26 20:01:34,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:34,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461692341] [2020-10-26 20:01:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:34,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:34,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:34,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:34,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:35,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:35,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:36,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:36,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:01:36,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:01:36,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2610 [2020-10-26 20:01:36,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:36,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:36,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-26 20:01:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:01:36,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:36,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:36,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:36,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:36,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:36,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:36,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:36,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:36,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:36,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:01:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 457 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-10-26 20:01:37,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461692341] [2020-10-26 20:01:37,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:37,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:37,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774831306] [2020-10-26 20:01:37,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:37,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:37,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:37,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:37,024 INFO L87 Difference]: Start difference. First operand 4356 states and 5937 transitions. Second operand 4 states. [2020-10-26 20:01:37,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:37,600 INFO L93 Difference]: Finished difference Result 12944 states and 17608 transitions. [2020-10-26 20:01:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:37,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-26 20:01:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:37,632 INFO L225 Difference]: With dead ends: 12944 [2020-10-26 20:01:37,632 INFO L226 Difference]: Without dead ends: 8613 [2020-10-26 20:01:37,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8613 states. [2020-10-26 20:01:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8613 to 4368. [2020-10-26 20:01:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4368 states. [2020-10-26 20:01:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4368 states to 4368 states and 5949 transitions. [2020-10-26 20:01:37,919 INFO L78 Accepts]: Start accepts. Automaton has 4368 states and 5949 transitions. Word has length 313 [2020-10-26 20:01:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:37,919 INFO L481 AbstractCegarLoop]: Abstraction has 4368 states and 5949 transitions. [2020-10-26 20:01:37,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4368 states and 5949 transitions. [2020-10-26 20:01:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-26 20:01:37,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:37,931 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:01:37,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 20:01:37,932 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1035511826, now seen corresponding path program 1 times [2020-10-26 20:01:37,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:37,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40495124] [2020-10-26 20:01:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:37,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:37,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:38,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:38,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:38,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:38,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:39,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:40,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:40,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:42,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:42,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:01:42,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 20:01:42,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 20:01:42,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:42,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:42,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-26 20:01:42,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-26 20:01:42,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:43,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:43,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:43,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:43,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:43,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:43,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:01:43,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:43,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:43,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:43,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:43,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 611 proven. 3 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-10-26 20:01:43,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40495124] [2020-10-26 20:01:43,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:43,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:01:43,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335813925] [2020-10-26 20:01:43,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:43,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:43,660 INFO L87 Difference]: Start difference. First operand 4368 states and 5949 transitions. Second operand 6 states. [2020-10-26 20:01:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:45,683 INFO L93 Difference]: Finished difference Result 18185 states and 24686 transitions. [2020-10-26 20:01:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:01:45,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 313 [2020-10-26 20:01:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:45,720 INFO L225 Difference]: With dead ends: 18185 [2020-10-26 20:01:45,720 INFO L226 Difference]: Without dead ends: 13842 [2020-10-26 20:01:45,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:01:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13842 states. [2020-10-26 20:01:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13842 to 13828. [2020-10-26 20:01:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13828 states. [2020-10-26 20:01:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13828 states to 13828 states and 18704 transitions. [2020-10-26 20:01:46,459 INFO L78 Accepts]: Start accepts. Automaton has 13828 states and 18704 transitions. Word has length 313 [2020-10-26 20:01:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:46,460 INFO L481 AbstractCegarLoop]: Abstraction has 13828 states and 18704 transitions. [2020-10-26 20:01:46,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 13828 states and 18704 transitions. [2020-10-26 20:01:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-26 20:01:46,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:46,490 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:46,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 20:01:46,490 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:46,491 INFO L82 PathProgramCache]: Analyzing trace with hash 306359408, now seen corresponding path program 1 times [2020-10-26 20:01:46,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:46,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633838832] [2020-10-26 20:01:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:46,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:46,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:46,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:46,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:47,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:47,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:49,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:49,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:01:49,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:01:49,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2523 [2020-10-26 20:01:49,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-26 20:01:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-26 20:01:49,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:49,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:49,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:49,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:49,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:49,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:49,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:49,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:49,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:49,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:49,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:49,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-10-26 20:01:49,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633838832] [2020-10-26 20:01:49,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:49,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936326350] [2020-10-26 20:01:49,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:49,342 INFO L87 Difference]: Start difference. First operand 13828 states and 18704 transitions. Second operand 4 states. [2020-10-26 20:01:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:50,681 INFO L93 Difference]: Finished difference Result 39512 states and 53483 transitions. [2020-10-26 20:01:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:50,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-26 20:01:50,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:50,745 INFO L225 Difference]: With dead ends: 39512 [2020-10-26 20:01:50,745 INFO L226 Difference]: Without dead ends: 26633 [2020-10-26 20:01:50,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26633 states. [2020-10-26 20:01:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26633 to 26632. [2020-10-26 20:01:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26632 states. [2020-10-26 20:01:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26632 states to 26632 states and 36002 transitions. [2020-10-26 20:01:51,902 INFO L78 Accepts]: Start accepts. Automaton has 26632 states and 36002 transitions. Word has length 313 [2020-10-26 20:01:51,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:51,902 INFO L481 AbstractCegarLoop]: Abstraction has 26632 states and 36002 transitions. [2020-10-26 20:01:51,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 26632 states and 36002 transitions. [2020-10-26 20:01:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-26 20:01:51,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:51,946 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:51,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 20:01:51,947 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:51,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1172486384, now seen corresponding path program 2 times [2020-10-26 20:01:51,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:51,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127588450] [2020-10-26 20:01:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:51,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:52,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:52,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:52,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:52,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:52,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:53,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:54,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:54,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:01:54,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:01:54,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2480 [2020-10-26 20:01:54,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-26 20:01:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-26 20:01:54,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:54,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:54,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:54,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:54,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:54,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:54,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:54,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:54,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-10-26 20:01:54,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127588450] [2020-10-26 20:01:54,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:54,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:54,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044507950] [2020-10-26 20:01:54,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:54,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:54,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:54,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:54,698 INFO L87 Difference]: Start difference. First operand 26632 states and 36002 transitions. Second operand 4 states. [2020-10-26 20:01:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:56,044 INFO L93 Difference]: Finished difference Result 39494 states and 53363 transitions. [2020-10-26 20:01:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:56,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-26 20:01:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:56,111 INFO L225 Difference]: With dead ends: 39494 [2020-10-26 20:01:56,112 INFO L226 Difference]: Without dead ends: 26651 [2020-10-26 20:01:56,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26651 states. [2020-10-26 20:01:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26651 to 26650. [2020-10-26 20:01:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26650 states. [2020-10-26 20:01:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26650 states to 26650 states and 35990 transitions. [2020-10-26 20:01:57,524 INFO L78 Accepts]: Start accepts. Automaton has 26650 states and 35990 transitions. Word has length 313 [2020-10-26 20:01:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:57,525 INFO L481 AbstractCegarLoop]: Abstraction has 26650 states and 35990 transitions. [2020-10-26 20:01:57,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 26650 states and 35990 transitions. [2020-10-26 20:01:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-26 20:01:57,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:57,553 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:01:57,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 20:01:57,553 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:57,554 INFO L82 PathProgramCache]: Analyzing trace with hash 443333966, now seen corresponding path program 1 times [2020-10-26 20:01:57,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:57,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357762165] [2020-10-26 20:01:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:57,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:57,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:57,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:57,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:58,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:58,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:01:58,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:01:58,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-26 20:01:58,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:58,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-26 20:01:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 20:01:58,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:58,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:58,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:58,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:58,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:58,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:58,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:58,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:58,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:58,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:58,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 580 proven. 0 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2020-10-26 20:01:58,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357762165] [2020-10-26 20:01:58,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:58,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:58,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755405745] [2020-10-26 20:01:58,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:58,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:58,329 INFO L87 Difference]: Start difference. First operand 26650 states and 35990 transitions. Second operand 4 states. [2020-10-26 20:01:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:59,472 INFO L93 Difference]: Finished difference Result 54795 states and 74224 transitions. [2020-10-26 20:01:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:59,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-26 20:01:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:59,540 INFO L225 Difference]: With dead ends: 54795 [2020-10-26 20:01:59,541 INFO L226 Difference]: Without dead ends: 29112 [2020-10-26 20:01:59,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:59,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29112 states. [2020-10-26 20:02:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29112 to 28594. [2020-10-26 20:02:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28594 states. [2020-10-26 20:02:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28594 states to 28594 states and 38294 transitions. [2020-10-26 20:02:01,123 INFO L78 Accepts]: Start accepts. Automaton has 28594 states and 38294 transitions. Word has length 313 [2020-10-26 20:02:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:01,124 INFO L481 AbstractCegarLoop]: Abstraction has 28594 states and 38294 transitions. [2020-10-26 20:02:01,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 28594 states and 38294 transitions. [2020-10-26 20:02:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-26 20:02:01,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:01,162 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:01,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 20:02:01,163 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 476550928, now seen corresponding path program 1 times [2020-10-26 20:02:01,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:01,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792221098] [2020-10-26 20:02:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:01,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:01,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:01,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:01,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:02,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:02,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-26 20:02:02,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:02:02,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-26 20:02:02,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:02,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:02:02,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-26 20:02:02,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:02:02,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:02,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:02,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:02,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:02,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:02,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:02,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:02:02,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:02,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:02,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:02,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:02,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 838 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-26 20:02:02,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792221098] [2020-10-26 20:02:02,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:02:02,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:02:02,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503584660] [2020-10-26 20:02:02,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:02:02,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:02:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:02:02,181 INFO L87 Difference]: Start difference. First operand 28594 states and 38294 transitions. Second operand 4 states. [2020-10-26 20:02:03,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:03,513 INFO L93 Difference]: Finished difference Result 59457 states and 79741 transitions. [2020-10-26 20:02:03,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:02:03,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 359 [2020-10-26 20:02:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:03,562 INFO L225 Difference]: With dead ends: 59457 [2020-10-26 20:02:03,562 INFO L226 Difference]: Without dead ends: 30888 [2020-10-26 20:02:03,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30888 states. [2020-10-26 20:02:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30888 to 30740. [2020-10-26 20:02:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30740 states. [2020-10-26 20:02:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30740 states to 30740 states and 40810 transitions. [2020-10-26 20:02:05,024 INFO L78 Accepts]: Start accepts. Automaton has 30740 states and 40810 transitions. Word has length 359 [2020-10-26 20:02:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:05,025 INFO L481 AbstractCegarLoop]: Abstraction has 30740 states and 40810 transitions. [2020-10-26 20:02:05,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 30740 states and 40810 transitions. [2020-10-26 20:02:05,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-10-26 20:02:05,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:05,064 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:05,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 20:02:05,064 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1444413061, now seen corresponding path program 1 times [2020-10-26 20:02:05,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:05,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049444818] [2020-10-26 20:02:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:06,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:06,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:08,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:08,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-10-26 20:02:08,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 20:02:08,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3135 [2020-10-26 20:02:08,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:08,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:02:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-26 20:02:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 20:02:08,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:08,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:08,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:08,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:08,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:08,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:08,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:02:08,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:08,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:08,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:08,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:08,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 956 proven. 0 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2020-10-26 20:02:08,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049444818] [2020-10-26 20:02:08,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:02:08,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:02:08,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510716359] [2020-10-26 20:02:08,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:02:08,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:08,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:02:08,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:02:08,468 INFO L87 Difference]: Start difference. First operand 30740 states and 40810 transitions. Second operand 4 states. [2020-10-26 20:02:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:10,413 INFO L93 Difference]: Finished difference Result 86434 states and 114739 transitions. [2020-10-26 20:02:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:02:10,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 422 [2020-10-26 20:02:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:10,485 INFO L225 Difference]: With dead ends: 86434 [2020-10-26 20:02:10,486 INFO L226 Difference]: Without dead ends: 55719 [2020-10-26 20:02:10,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55719 states. [2020-10-26 20:02:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55719 to 38830. [2020-10-26 20:02:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38830 states. [2020-10-26 20:02:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38830 states to 38830 states and 51544 transitions. [2020-10-26 20:02:12,042 INFO L78 Accepts]: Start accepts. Automaton has 38830 states and 51544 transitions. Word has length 422 [2020-10-26 20:02:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:12,043 INFO L481 AbstractCegarLoop]: Abstraction has 38830 states and 51544 transitions. [2020-10-26 20:02:12,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 38830 states and 51544 transitions. [2020-10-26 20:02:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-10-26 20:02:12,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:12,094 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:12,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 20:02:12,094 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:12,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1570373613, now seen corresponding path program 1 times [2020-10-26 20:02:12,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:12,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133272894] [2020-10-26 20:02:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:12,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:12,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:12,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:12,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:13,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:13,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 434 [2020-10-26 20:02:13,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:02:13,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1677 [2020-10-26 20:02:13,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 20:02:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-26 20:02:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 20:02:13,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:13,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:13,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:13,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:13,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:13,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:13,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:02:13,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:13,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:13,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:13,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:13,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1235 proven. 26 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2020-10-26 20:02:14,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133272894] [2020-10-26 20:02:14,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:14,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:02:14,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697981559] [2020-10-26 20:02:14,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:02:14,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:14,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:02:14,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:14,135 INFO L87 Difference]: Start difference. First operand 38830 states and 51544 transitions. Second operand 5 states. [2020-10-26 20:02:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:17,407 INFO L93 Difference]: Finished difference Result 116218 states and 153663 transitions. [2020-10-26 20:02:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:02:17,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 424 [2020-10-26 20:02:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:17,505 INFO L225 Difference]: With dead ends: 116218 [2020-10-26 20:02:17,505 INFO L226 Difference]: Without dead ends: 77413 [2020-10-26 20:02:17,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:02:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77413 states. [2020-10-26 20:02:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77413 to 53512. [2020-10-26 20:02:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53512 states. [2020-10-26 20:02:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53512 states to 53512 states and 71420 transitions. [2020-10-26 20:02:20,341 INFO L78 Accepts]: Start accepts. Automaton has 53512 states and 71420 transitions. Word has length 424 [2020-10-26 20:02:20,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:20,341 INFO L481 AbstractCegarLoop]: Abstraction has 53512 states and 71420 transitions. [2020-10-26 20:02:20,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:02:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 53512 states and 71420 transitions. [2020-10-26 20:02:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-26 20:02:20,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:20,387 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 14, 14, 12, 12, 10, 10, 8, 8, 8, 8, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:20,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 20:02:20,387 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash -175845744, now seen corresponding path program 1 times [2020-10-26 20:02:20,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:20,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776973121] [2020-10-26 20:02:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:20,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:20,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:20,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:20,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:21,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:21,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:21,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 497 [2020-10-26 20:02:21,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:02:21,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1177 [2020-10-26 20:02:21,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:21,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:02:21,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-26 20:02:21,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:02:21,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:21,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:21,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:21,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:21,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:21,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:02:21,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:21,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2679 backedges. 1558 proven. 0 refuted. 0 times theorem prover too weak. 1121 trivial. 0 not checked. [2020-10-26 20:02:21,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776973121] [2020-10-26 20:02:21,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:02:21,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:02:21,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100902225] [2020-10-26 20:02:21,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:02:21,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:02:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:02:21,876 INFO L87 Difference]: Start difference. First operand 53512 states and 71420 transitions. Second operand 4 states. [2020-10-26 20:02:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:24,311 INFO L93 Difference]: Finished difference Result 113767 states and 152587 transitions. [2020-10-26 20:02:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:02:24,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-10-26 20:02:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:24,381 INFO L225 Difference]: With dead ends: 113767 [2020-10-26 20:02:24,381 INFO L226 Difference]: Without dead ends: 60280 [2020-10-26 20:02:24,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60280 states. [2020-10-26 20:02:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60280 to 59904. [2020-10-26 20:02:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59904 states. [2020-10-26 20:02:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59904 states to 59904 states and 78752 transitions. [2020-10-26 20:02:26,722 INFO L78 Accepts]: Start accepts. Automaton has 59904 states and 78752 transitions. Word has length 487 [2020-10-26 20:02:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:26,722 INFO L481 AbstractCegarLoop]: Abstraction has 59904 states and 78752 transitions. [2020-10-26 20:02:26,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 59904 states and 78752 transitions. [2020-10-26 20:02:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2020-10-26 20:02:26,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:26,783 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 16, 16, 14, 14, 12, 12, 10, 10, 10, 10, 7, 5, 5, 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] [2020-10-26 20:02:26,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 20:02:26,783 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:26,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1830885240, now seen corresponding path program 1 times [2020-10-26 20:02:26,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:26,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353897866] [2020-10-26 20:02:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:26,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:26,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:27,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:27,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:28,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:28,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 559 [2020-10-26 20:02:28,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:02:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-26 20:02:28,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:02:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 218 [2020-10-26 20:02:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 20:02:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:28,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:28,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:28,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:28,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:28,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:02:28,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3474 backedges. 2004 proven. 0 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-26 20:02:28,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353897866] [2020-10-26 20:02:28,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:02:28,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:02:28,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130840336] [2020-10-26 20:02:28,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:02:28,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:28,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:02:28,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:02:28,460 INFO L87 Difference]: Start difference. First operand 59904 states and 78752 transitions. Second operand 4 states. [2020-10-26 20:02:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:30,704 INFO L93 Difference]: Finished difference Result 119877 states and 157475 transitions. [2020-10-26 20:02:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:02:30,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 549 [2020-10-26 20:02:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:30,778 INFO L225 Difference]: With dead ends: 119877 [2020-10-26 20:02:30,778 INFO L226 Difference]: Without dead ends: 59998 [2020-10-26 20:02:30,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59998 states. [2020-10-26 20:02:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59998 to 52914. [2020-10-26 20:02:32,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52914 states. [2020-10-26 20:02:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52914 states to 52914 states and 68314 transitions. [2020-10-26 20:02:32,809 INFO L78 Accepts]: Start accepts. Automaton has 52914 states and 68314 transitions. Word has length 549 [2020-10-26 20:02:32,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:32,810 INFO L481 AbstractCegarLoop]: Abstraction has 52914 states and 68314 transitions. [2020-10-26 20:02:32,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:32,810 INFO L276 IsEmpty]: Start isEmpty. Operand 52914 states and 68314 transitions. [2020-10-26 20:02:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2020-10-26 20:02:32,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:32,865 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 20, 20, 19, 19, 19, 18, 18, 18, 16, 16, 14, 14, 12, 12, 10, 10, 10, 10, 5, 5, 5, 5, 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] [2020-10-26 20:02:32,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 20:02:32,865 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:32,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:32,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1506668073, now seen corresponding path program 1 times [2020-10-26 20:02:32,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:32,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682968704] [2020-10-26 20:02:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:32,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:32,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:32,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:32,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:33,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:34,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:35,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:37,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:37,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 574 [2020-10-26 20:02:37,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:02:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 20:02:37,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:02:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 186 [2020-10-26 20:02:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:02:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:37,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:37,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:37,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:37,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:37,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:37,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:02:37,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:37,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 1892 proven. 0 refuted. 0 times theorem prover too weak. 1956 trivial. 0 not checked. [2020-10-26 20:02:38,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682968704] [2020-10-26 20:02:38,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:02:38,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:02:38,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643988026] [2020-10-26 20:02:38,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:02:38,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:38,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:02:38,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:02:38,100 INFO L87 Difference]: Start difference. First operand 52914 states and 68314 transitions. Second operand 4 states. [2020-10-26 20:02:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:39,989 INFO L93 Difference]: Finished difference Result 105741 states and 136537 transitions. [2020-10-26 20:02:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:02:39,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 564 [2020-10-26 20:02:39,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:40,052 INFO L225 Difference]: With dead ends: 105741 [2020-10-26 20:02:40,052 INFO L226 Difference]: Without dead ends: 52852 [2020-10-26 20:02:40,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2020-10-26 20:02:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 52288. [2020-10-26 20:02:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52288 states. [2020-10-26 20:02:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52288 states to 52288 states and 66560 transitions. [2020-10-26 20:02:42,072 INFO L78 Accepts]: Start accepts. Automaton has 52288 states and 66560 transitions. Word has length 564 [2020-10-26 20:02:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:42,073 INFO L481 AbstractCegarLoop]: Abstraction has 52288 states and 66560 transitions. [2020-10-26 20:02:42,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 52288 states and 66560 transitions. [2020-10-26 20:02:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2020-10-26 20:02:42,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:42,116 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 18, 18, 18, 16, 16, 14, 14, 12, 12, 10, 10, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:42,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 20:02:42,117 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:42,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1866399175, now seen corresponding path program 1 times [2020-10-26 20:02:42,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:42,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935408955] [2020-10-26 20:02:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:42,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:42,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:42,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:42,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:44,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:44,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:44,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:45,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:45,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:46,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:47,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:47,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 588 [2020-10-26 20:02:47,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 20:02:47,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 20:02:47,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:02:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:02:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-10-26 20:02:47,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:47,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:47,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:47,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:47,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:47,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:47,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:02:47,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:47,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:47,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:47,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:47,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3981 backedges. 2202 proven. 309 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-26 20:02:48,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935408955] [2020-10-26 20:02:48,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:48,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:02:48,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164531543] [2020-10-26 20:02:48,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:02:48,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:48,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:02:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:02:48,168 INFO L87 Difference]: Start difference. First operand 52288 states and 66560 transitions. Second operand 6 states. [2020-10-26 20:02:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:52,660 INFO L93 Difference]: Finished difference Result 110011 states and 139123 transitions. [2020-10-26 20:02:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:02:52,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 578 [2020-10-26 20:02:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:52,746 INFO L225 Difference]: With dead ends: 110011 [2020-10-26 20:02:52,746 INFO L226 Difference]: Without dead ends: 75761 [2020-10-26 20:02:52,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:02:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75761 states. [2020-10-26 20:02:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75761 to 68221. [2020-10-26 20:02:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68221 states. [2020-10-26 20:02:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68221 states to 68221 states and 86510 transitions. [2020-10-26 20:02:55,652 INFO L78 Accepts]: Start accepts. Automaton has 68221 states and 86510 transitions. Word has length 578 [2020-10-26 20:02:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:55,653 INFO L481 AbstractCegarLoop]: Abstraction has 68221 states and 86510 transitions. [2020-10-26 20:02:55,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:02:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 68221 states and 86510 transitions. [2020-10-26 20:02:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2020-10-26 20:02:55,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:55,740 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 18, 18, 18, 16, 16, 14, 14, 12, 12, 10, 10, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:55,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 20:02:55,741 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1940080061, now seen corresponding path program 1 times [2020-10-26 20:02:55,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:55,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870295502] [2020-10-26 20:02:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:56,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:56,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:56,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:56,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:56,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:57,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:57,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:58,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:01,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:01,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 600 [2020-10-26 20:03:01,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:03:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 20:03:01,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:03:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:03:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-26 20:03:01,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:01,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:01,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:01,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:01,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:01,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:01,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:03:01,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:01,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 2249 proven. 170 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2020-10-26 20:03:02,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870295502] [2020-10-26 20:03:02,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:02,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:03:02,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346151191] [2020-10-26 20:03:02,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:03:02,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:02,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:03:02,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:03:02,044 INFO L87 Difference]: Start difference. First operand 68221 states and 86510 transitions. Second operand 6 states. [2020-10-26 20:03:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:06,775 INFO L93 Difference]: Finished difference Result 139133 states and 175735 transitions. [2020-10-26 20:03:06,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:03:06,775 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 590 [2020-10-26 20:03:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:06,877 INFO L225 Difference]: With dead ends: 139133 [2020-10-26 20:03:06,878 INFO L226 Difference]: Without dead ends: 89270 [2020-10-26 20:03:07,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:03:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89270 states. [2020-10-26 20:03:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89270 to 84538. [2020-10-26 20:03:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84538 states. [2020-10-26 20:03:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84538 states to 84538 states and 106972 transitions. [2020-10-26 20:03:10,667 INFO L78 Accepts]: Start accepts. Automaton has 84538 states and 106972 transitions. Word has length 590 [2020-10-26 20:03:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:10,667 INFO L481 AbstractCegarLoop]: Abstraction has 84538 states and 106972 transitions. [2020-10-26 20:03:10,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:03:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 84538 states and 106972 transitions. [2020-10-26 20:03:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-10-26 20:03:10,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:10,740 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 18, 18, 18, 16, 16, 14, 14, 12, 12, 10, 10, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:10,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 20:03:10,740 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:10,740 INFO L82 PathProgramCache]: Analyzing trace with hash 281113770, now seen corresponding path program 1 times [2020-10-26 20:03:10,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:10,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274421586] [2020-10-26 20:03:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:10,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:10,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:11,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:11,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:11,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:12,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:12,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:15,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:15,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 601 [2020-10-26 20:03:15,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:03:15,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 20:03:15,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:15,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:03:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:03:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 246 [2020-10-26 20:03:15,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:16,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:16,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:16,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:16,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:03:16,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4231 backedges. 2440 proven. 180 refuted. 0 times theorem prover too weak. 1611 trivial. 0 not checked. [2020-10-26 20:03:16,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274421586] [2020-10-26 20:03:16,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:16,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:03:16,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744259061] [2020-10-26 20:03:16,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:03:16,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:03:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:03:16,821 INFO L87 Difference]: Start difference. First operand 84538 states and 106972 transitions. Second operand 6 states. [2020-10-26 20:03:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:22,289 INFO L93 Difference]: Finished difference Result 195692 states and 247366 transitions. [2020-10-26 20:03:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:03:22,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 591 [2020-10-26 20:03:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:22,438 INFO L225 Difference]: With dead ends: 195692 [2020-10-26 20:03:22,438 INFO L226 Difference]: Without dead ends: 111115 [2020-10-26 20:03:22,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:03:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111115 states. [2020-10-26 20:03:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111115 to 110354. [2020-10-26 20:03:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110354 states. [2020-10-26 20:03:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110354 states to 110354 states and 139212 transitions. [2020-10-26 20:03:27,450 INFO L78 Accepts]: Start accepts. Automaton has 110354 states and 139212 transitions. Word has length 591 [2020-10-26 20:03:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:27,450 INFO L481 AbstractCegarLoop]: Abstraction has 110354 states and 139212 transitions. [2020-10-26 20:03:27,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:03:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 110354 states and 139212 transitions. [2020-10-26 20:03:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2020-10-26 20:03:27,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:27,770 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 18, 18, 16, 16, 14, 14, 12, 12, 12, 12, 9, 7, 7, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:27,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 20:03:27,770 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:27,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1897475353, now seen corresponding path program 1 times [2020-10-26 20:03:27,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:27,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366480692] [2020-10-26 20:03:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:27,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:27,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:28,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:28,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:29,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:29,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 626 [2020-10-26 20:03:29,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:03:29,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1421 [2020-10-26 20:03:29,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:29,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:03:29,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 251 [2020-10-26 20:03:29,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 20:03:29,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:29,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:29,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:29,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:29,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:29,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:29,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:03:29,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:29,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:29,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:29,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:29,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 2518 proven. 0 refuted. 0 times theorem prover too weak. 1883 trivial. 0 not checked. [2020-10-26 20:03:29,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366480692] [2020-10-26 20:03:29,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:03:29,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:03:29,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681587655] [2020-10-26 20:03:29,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:03:29,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:29,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:03:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:03:29,547 INFO L87 Difference]: Start difference. First operand 110354 states and 139212 transitions. Second operand 4 states. [2020-10-26 20:03:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:34,204 INFO L93 Difference]: Finished difference Result 220766 states and 278235 transitions. [2020-10-26 20:03:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:03:34,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 616 [2020-10-26 20:03:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:34,356 INFO L225 Difference]: With dead ends: 220766 [2020-10-26 20:03:34,356 INFO L226 Difference]: Without dead ends: 110480 [2020-10-26 20:03:34,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:03:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110480 states. [2020-10-26 20:03:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110480 to 109846. [2020-10-26 20:03:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109846 states. [2020-10-26 20:03:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109846 states to 109846 states and 138292 transitions. [2020-10-26 20:03:39,376 INFO L78 Accepts]: Start accepts. Automaton has 109846 states and 138292 transitions. Word has length 616 [2020-10-26 20:03:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:39,376 INFO L481 AbstractCegarLoop]: Abstraction has 109846 states and 138292 transitions. [2020-10-26 20:03:39,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:03:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 109846 states and 138292 transitions. [2020-10-26 20:03:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2020-10-26 20:03:39,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:39,488 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 19, 19, 19, 17, 17, 15, 15, 13, 13, 11, 11, 11, 11, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:39,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 20:03:39,488 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -256532110, now seen corresponding path program 1 times [2020-10-26 20:03:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349827502] [2020-10-26 20:03:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:39,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:39,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:39,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:39,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:41,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:44,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:44,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 642 [2020-10-26 20:03:44,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:03:44,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 20:03:44,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:44,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:03:44,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:03:44,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 540 [2020-10-26 20:03:44,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:44,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:44,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:44,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:44,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:44,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:44,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:03:44,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:44,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:44,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:44,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:44,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 925 proven. 468 refuted. 0 times theorem prover too weak. 3339 trivial. 0 not checked. [2020-10-26 20:03:46,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349827502] [2020-10-26 20:03:46,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:46,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:03:46,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350801547] [2020-10-26 20:03:46,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:03:46,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:46,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:03:46,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:03:46,925 INFO L87 Difference]: Start difference. First operand 109846 states and 138292 transitions. Second operand 6 states. [2020-10-26 20:03:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:53,858 INFO L93 Difference]: Finished difference Result 202859 states and 254585 transitions. [2020-10-26 20:03:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:03:53,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 632 [2020-10-26 20:03:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:54,028 INFO L225 Difference]: With dead ends: 202859 [2020-10-26 20:03:54,028 INFO L226 Difference]: Without dead ends: 132019 [2020-10-26 20:03:54,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:03:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132019 states. [2020-10-26 20:03:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132019 to 128083. [2020-10-26 20:03:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128083 states. [2020-10-26 20:03:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128083 states to 128083 states and 161026 transitions. [2020-10-26 20:03:59,846 INFO L78 Accepts]: Start accepts. Automaton has 128083 states and 161026 transitions. Word has length 632 [2020-10-26 20:03:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:59,846 INFO L481 AbstractCegarLoop]: Abstraction has 128083 states and 161026 transitions. [2020-10-26 20:03:59,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:03:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 128083 states and 161026 transitions. [2020-10-26 20:04:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2020-10-26 20:04:00,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:04:00,190 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 24, 24, 22, 22, 22, 19, 19, 19, 17, 17, 15, 15, 13, 13, 11, 11, 11, 11, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 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 20:04:00,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 20:04:00,190 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:04:00,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:04:00,191 INFO L82 PathProgramCache]: Analyzing trace with hash -600060050, now seen corresponding path program 1 times [2020-10-26 20:04:00,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:04:00,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481684015] [2020-10-26 20:04:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:04:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:04:00,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:00,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:00,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:01,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:01,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:05,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:04:05,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 646 [2020-10-26 20:04:05,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:04:05,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 20:04:05,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:04:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 20:04:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:04:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 20:04:05,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:04:05,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:04:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:04:05,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:05,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:04:05,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:04:05,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:04:05,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:04:05,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:04:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:04:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:04:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:04:05,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:04:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5121 backedges. 1257 proven. 16 refuted. 0 times theorem prover too weak. 3848 trivial. 0 not checked. [2020-10-26 20:04:05,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481684015] [2020-10-26 20:04:05,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:04:05,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:04:05,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306368167] [2020-10-26 20:04:05,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:04:05,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:04:05,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:04:05,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:04:05,514 INFO L87 Difference]: Start difference. First operand 128083 states and 161026 transitions. Second operand 5 states. [2020-10-26 20:04:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:04:09,571 INFO L93 Difference]: Finished difference Result 199104 states and 249682 transitions. [2020-10-26 20:04:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:04:09,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 636 [2020-10-26 20:04:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:04:09,629 INFO L225 Difference]: With dead ends: 199104 [2020-10-26 20:04:09,629 INFO L226 Difference]: Without dead ends: 42843 [2020-10-26 20:04:09,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:04:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42843 states. [2020-10-26 20:04:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42843 to 29547. [2020-10-26 20:04:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29547 states. [2020-10-26 20:04:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29547 states to 29547 states and 36068 transitions. [2020-10-26 20:04:11,294 INFO L78 Accepts]: Start accepts. Automaton has 29547 states and 36068 transitions. Word has length 636 [2020-10-26 20:04:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:04:11,294 INFO L481 AbstractCegarLoop]: Abstraction has 29547 states and 36068 transitions. [2020-10-26 20:04:11,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:04:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29547 states and 36068 transitions. [2020-10-26 20:04:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2020-10-26 20:04:11,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:04:11,335 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 22, 22, 22, 20, 20, 18, 18, 16, 16, 14, 14, 14, 14, 11, 9, 9, 7, 7, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:11,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 20:04:11,336 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:04:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:04:11,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1194248659, now seen corresponding path program 1 times [2020-10-26 20:04:11,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:04:11,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967010046] [2020-10-26 20:04:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:04:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:04:11,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:11,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:11,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:04:11,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 715 [2020-10-26 20:04:11,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:04:11,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-26 20:04:11,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:04:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 20:04:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 369 [2020-10-26 20:04:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:04:11,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:04:12,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:04:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:04:12,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:12,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:04:12,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:04:12,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:04:12,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:04:12,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:04:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:04:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:04:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:04:12,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:04:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5764 backedges. 3413 proven. 13 refuted. 0 times theorem prover too weak. 2338 trivial. 0 not checked. [2020-10-26 20:04:12,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967010046] [2020-10-26 20:04:12,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:04:12,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:04:12,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361206343] [2020-10-26 20:04:12,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:04:12,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:04:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:04:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:04:12,439 INFO L87 Difference]: Start difference. First operand 29547 states and 36068 transitions. Second operand 5 states. [2020-10-26 20:04:14,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:04:14,134 INFO L93 Difference]: Finished difference Result 49343 states and 60012 transitions. [2020-10-26 20:04:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:04:14,135 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 705 [2020-10-26 20:04:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:04:14,135 INFO L225 Difference]: With dead ends: 49343 [2020-10-26 20:04:14,135 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 20:04:14,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:04:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 20:04:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 20:04:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 20:04:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 20:04:14,179 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 705 [2020-10-26 20:04:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:04:14,179 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 20:04:14,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:04:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 20:04:14,180 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 20:04:14,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 20:04:14,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-26 20:04:17,458 WARN L193 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 609 DAG size of output: 502 [2020-10-26 20:04:19,165 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 640 DAG size of output: 438 [2020-10-26 20:04:21,580 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 816 DAG size of output: 532