/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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-loops/verisec_sendmail_tTflag_arr_one_loop.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:35:45,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:35:45,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:35:45,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:35:45,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:35:45,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:35:45,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:35:45,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:35:45,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:35:45,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:35:45,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:35:45,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:35:45,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:35:45,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:35:45,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:35:45,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:35:45,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:35:45,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:35:45,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:35:46,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:35:46,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:35:46,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:35:46,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:35:46,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:35:46,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:35:46,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:35:46,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:35:46,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:35:46,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:35:46,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:35:46,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:35:46,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:35:46,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:35:46,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:35:46,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:35:46,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:35:46,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:35:46,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:35:46,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:35:46,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:35:46,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:35:46,043 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 [2020-10-28 09:35:46,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:35:46,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:35:46,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:35:46,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:35:46,110 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:35:46,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:35:46,111 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:35:46,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:35:46,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:35:46,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:35:46,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:35:46,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:35:46,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:35:46,113 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:35:46,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:35:46,113 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:35:46,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:35:46,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:35:46,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:35:46,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:35:46,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:35:46,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:35:46,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:35:46,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:35:46,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:35:46,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:35:46,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:35:46,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:35:46,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:35:46,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:35:46,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:35:46,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:35:46,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:35:46,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:35:46,627 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:35:46,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2020-10-28 09:35:46,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2c27db51/b36606569d3a4855bfaa44e00df46118/FLAG0b278feb2 [2020-10-28 09:35:47,410 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:35:47,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2020-10-28 09:35:47,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2c27db51/b36606569d3a4855bfaa44e00df46118/FLAG0b278feb2 [2020-10-28 09:35:47,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2c27db51/b36606569d3a4855bfaa44e00df46118 [2020-10-28 09:35:47,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:35:47,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:35:47,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:35:47,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:35:47,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:35:47,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:35:47" (1/1) ... [2020-10-28 09:35:47,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e78fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:47, skipping insertion in model container [2020-10-28 09:35:47,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:35:47" (1/1) ... [2020-10-28 09:35:47,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:35:47,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:35:47,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:35:47,971 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:35:47,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:35:48,008 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:35:48,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48 WrapperNode [2020-10-28 09:35:48,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:35:48,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:35:48,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:35:48,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:35:48,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48" (1/1) ... [2020-10-28 09:35:48,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48" (1/1) ... [2020-10-28 09:35:48,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48" (1/1) ... [2020-10-28 09:35:48,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48" (1/1) ... [2020-10-28 09:35:48,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48" (1/1) ... [2020-10-28 09:35:48,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48" (1/1) ... [2020-10-28 09:35:48,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48" (1/1) ... [2020-10-28 09:35:48,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:35:48,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:35:48,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:35:48,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:35:48,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48" (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 [2020-10-28 09:35:48,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:35:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:35:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:35:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:35:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:35:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:35:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:35:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:35:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:35:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 09:35:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:35:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:35:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:35:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:35:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:35:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:35:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:35:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:35:48,477 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:35:48,478 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:35:48,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:35:48 BoogieIcfgContainer [2020-10-28 09:35:48,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:35:48,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:35:48,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:35:48,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:35:48,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:35:47" (1/3) ... [2020-10-28 09:35:48,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5246aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:35:48, skipping insertion in model container [2020-10-28 09:35:48,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:48" (2/3) ... [2020-10-28 09:35:48,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5246aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:35:48, skipping insertion in model container [2020-10-28 09:35:48,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:35:48" (3/3) ... [2020-10-28 09:35:48,538 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_sendmail_tTflag_arr_one_loop.c [2020-10-28 09:35:48,573 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:35:48,584 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:35:48,611 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:35:48,642 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:35:48,642 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:35:48,642 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:35:48,643 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:35:48,643 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:35:48,643 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:35:48,643 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:35:48,643 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:35:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-28 09:35:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 09:35:48,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:48,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:48,670 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:48,678 INFO L82 PathProgramCache]: Analyzing trace with hash 32088636, now seen corresponding path program 1 times [2020-10-28 09:35:48,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:48,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275537127] [2020-10-28 09:35:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:48,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:49,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:49,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:49,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 09:35:49,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:35:49,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-28 09:35:49,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:49,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:49,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:35:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:35:49,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 09:35:49,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:49,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:49,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:49,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:49,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:49,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:35:49,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:49,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:49,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:49,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:49,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:49,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:35:49,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275537127] [2020-10-28 09:35:49,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:35:49,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:35:49,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042290978] [2020-10-28 09:35:49,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:35:49,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:35:49,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:35:49,673 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 4 states. [2020-10-28 09:35:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:49,801 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-28 09:35:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:35:49,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-28 09:35:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:49,813 INFO L225 Difference]: With dead ends: 48 [2020-10-28 09:35:49,813 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 09:35:49,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:35:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 09:35:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-10-28 09:35:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 09:35:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-28 09:35:49,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-28 09:35:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:49,864 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-28 09:35:49,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:35:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-28 09:35:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 09:35:49,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:49,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:49,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:35:49,866 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:49,867 INFO L82 PathProgramCache]: Analyzing trace with hash -82318882, now seen corresponding path program 1 times [2020-10-28 09:35:49,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:49,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183253035] [2020-10-28 09:35:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:49,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:49,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:50,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:50,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 09:35:50,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:35:50,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-28 09:35:50,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:50,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:50,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:35:50,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 09:35:50,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:35:50,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:50,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:50,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:50,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:50,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:50,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:35:50,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:50,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:50,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:35:50,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183253035] [2020-10-28 09:35:50,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:35:50,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 09:35:50,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220945866] [2020-10-28 09:35:50,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:35:50,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:35:50,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:35:50,485 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-10-28 09:35:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:50,651 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-10-28 09:35:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:35:50,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 09:35:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:50,653 INFO L225 Difference]: With dead ends: 24 [2020-10-28 09:35:50,653 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 09:35:50,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:35:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 09:35:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 09:35:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 09:35:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-28 09:35:50,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-28 09:35:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:50,662 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-28 09:35:50,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:35:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-28 09:35:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:35:50,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:50,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:50,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:35:50,664 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1482549146, now seen corresponding path program 1 times [2020-10-28 09:35:50,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:50,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131216970] [2020-10-28 09:35:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:50,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:50,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:51,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:51,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:35:51,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:35:51,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-28 09:35:51,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:51,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:51,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:35:51,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:51,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:35:51,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:35:51,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:51,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:51,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:51,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:51,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:51,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:35:51,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:51,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:35:51,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131216970] [2020-10-28 09:35:51,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:51,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:35:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294713595] [2020-10-28 09:35:51,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:35:51,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:51,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:35:51,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:35:51,467 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-10-28 09:35:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:51,563 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-28 09:35:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:35:51,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 09:35:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:51,565 INFO L225 Difference]: With dead ends: 30 [2020-10-28 09:35:51,565 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 09:35:51,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:35:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 09:35:51,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-28 09:35:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 09:35:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 09:35:51,584 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-28 09:35:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:51,584 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 09:35:51,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:35:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 09:35:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:35:51,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:51,586 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:51,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:35:51,586 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:51,587 INFO L82 PathProgramCache]: Analyzing trace with hash 407115140, now seen corresponding path program 2 times [2020-10-28 09:35:51,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:51,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416782457] [2020-10-28 09:35:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:51,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:51,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:52,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:52,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:35:52,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:35:52,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-28 09:35:52,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:52,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:35:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:35:52,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:35:52,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:52,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:52,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:52,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:52,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:52,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 09:35:52,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:52,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:52,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:35:52,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416782457] [2020-10-28 09:35:52,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:52,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:35:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663766729] [2020-10-28 09:35:52,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:35:52,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:52,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:35:52,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:35:52,529 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2020-10-28 09:35:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:52,710 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-10-28 09:35:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:35:52,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-28 09:35:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:52,711 INFO L225 Difference]: With dead ends: 27 [2020-10-28 09:35:52,711 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 09:35:52,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:35:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 09:35:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 09:35:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 09:35:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 09:35:52,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-28 09:35:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:52,718 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 09:35:52,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:35:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 09:35:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 09:35:52,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:52,719 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:52,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:35:52,720 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:52,720 INFO L82 PathProgramCache]: Analyzing trace with hash 805003648, now seen corresponding path program 3 times [2020-10-28 09:35:52,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:52,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912291656] [2020-10-28 09:35:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:52,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:52,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:53,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:53,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 09:35:53,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:35:53,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-28 09:35:53,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:53,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:35:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:35:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:35:53,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:53,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:53,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:53,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:53,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:53,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:53,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:35:53,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:53,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:53,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:53,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:53,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:53,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:35:53,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912291656] [2020-10-28 09:35:53,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:53,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:35:53,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398417533] [2020-10-28 09:35:53,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:35:53,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:53,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:35:53,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:35:53,647 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-10-28 09:35:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:53,910 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-28 09:35:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:35:53,911 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 09:35:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:53,912 INFO L225 Difference]: With dead ends: 29 [2020-10-28 09:35:53,912 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 09:35:53,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:35:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 09:35:53,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-28 09:35:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 09:35:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 09:35:53,924 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-10-28 09:35:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:53,924 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 09:35:53,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:35:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 09:35:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:35:53,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:53,929 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:53,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:35:53,929 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:53,930 INFO L82 PathProgramCache]: Analyzing trace with hash 254645508, now seen corresponding path program 4 times [2020-10-28 09:35:53,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:53,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106584465] [2020-10-28 09:35:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:53,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:55,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:35:55,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:35:55,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1418 [2020-10-28 09:35:55,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:55,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:55,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:35:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:35:55,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:55,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:55,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:55,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:55,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:55,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:35:55,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:55,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:55,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:55,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:35:55,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106584465] [2020-10-28 09:35:55,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:55,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:35:55,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182404543] [2020-10-28 09:35:55,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:35:55,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:55,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:35:55,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:35:55,439 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-28 09:35:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:55,501 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-28 09:35:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:35:55,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 09:35:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:55,502 INFO L225 Difference]: With dead ends: 36 [2020-10-28 09:35:55,502 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 09:35:55,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:35:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 09:35:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-28 09:35:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 09:35:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-28 09:35:55,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-28 09:35:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:55,509 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-28 09:35:55,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:35:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-28 09:35:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:35:55,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:55,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:55,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:35:55,511 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:55,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash 909103906, now seen corresponding path program 5 times [2020-10-28 09:35:55,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:55,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427311691] [2020-10-28 09:35:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:55,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:55,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:58,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:58,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:35:58,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:35:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2480 [2020-10-28 09:35:58,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:58,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:58,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:35:58,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:35:58,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:35:58,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:58,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:58,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:58,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:58,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:58,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:35:58,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:58,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:58,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:58,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:58,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:58,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:35:58,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427311691] [2020-10-28 09:35:58,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:58,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:35:58,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446673734] [2020-10-28 09:35:58,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:35:58,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:58,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:35:58,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:35:58,142 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-10-28 09:35:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:58,327 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-28 09:35:58,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:35:58,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-28 09:35:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:58,328 INFO L225 Difference]: With dead ends: 31 [2020-10-28 09:35:58,329 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 09:35:58,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:35:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 09:35:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 09:35:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 09:35:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-28 09:35:58,338 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2020-10-28 09:35:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:58,338 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-28 09:35:58,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:35:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-28 09:35:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:35:58,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:58,339 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:58,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:35:58,340 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash -813213790, now seen corresponding path program 6 times [2020-10-28 09:35:58,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:58,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414042387] [2020-10-28 09:35:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:58,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:58,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:13,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:13,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:36:13,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:36:13,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14896 [2020-10-28 09:36:13,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:13,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:13,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:36:13,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:36:13,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:36:13,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:36:13,599 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-28 09:36:13,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:36:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:13,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:13,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:13,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:36:13,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:13,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:36:13,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:13,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:13,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:36:13,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:36:13,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:36:13,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:36:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:36:13,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414042387] [2020-10-28 09:36:13,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:36:13,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:36:13,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110962174] [2020-10-28 09:36:13,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:36:13,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:36:13,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:36:13,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:36:13,633 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 10 states. [2020-10-28 09:36:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:36:13,938 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-28 09:36:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:36:13,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-28 09:36:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:36:13,942 INFO L225 Difference]: With dead ends: 32 [2020-10-28 09:36:13,943 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 09:36:13,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:36:13,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 09:36:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 09:36:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:36:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-28 09:36:13,956 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2020-10-28 09:36:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:36:13,959 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-28 09:36:13,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:36:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-28 09:36:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:36:13,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:36:13,962 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:36:13,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:36:13,962 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:36:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:36:13,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1629512482, now seen corresponding path program 7 times [2020-10-28 09:36:13,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:36:13,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837059818] [2020-10-28 09:36:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:36:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:14,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:14,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:38:19,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:38:19,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:38:19,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:38:19,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125360 [2020-10-28 09:38:19,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:38:19,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:38:19,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:38:19,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:38:19,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:38:19,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:38:19,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:38:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:38:19,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:38:19,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:38:19,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:38:19,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:38:19,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:38:19,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:38:19,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:38:19,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:38:19,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:38:19,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:38:19,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:38:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:38:19,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837059818] [2020-10-28 09:38:19,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:38:19,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:38:19,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138825318] [2020-10-28 09:38:19,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:38:19,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:38:19,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:38:19,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:38:19,450 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-10-28 09:38:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:38:19,528 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-28 09:38:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:38:19,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-28 09:38:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:38:19,529 INFO L225 Difference]: With dead ends: 42 [2020-10-28 09:38:19,530 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:38:19,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:38:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:38:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-28 09:38:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 09:38:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-28 09:38:19,536 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-28 09:38:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:38:19,536 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-28 09:38:19,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:38:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-28 09:38:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:38:19,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:38:19,538 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:38:19,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:38:19,538 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:38:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:38:19,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1569037760, now seen corresponding path program 8 times [2020-10-28 09:38:19,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:38:19,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867053626] [2020-10-28 09:38:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:38:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:38:19,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:38:36,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:38:36,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:38:36,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:38:36,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17412 [2020-10-28 09:38:36,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:38:36,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:38:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:38:36,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:38:36,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:38:36,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0