/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/num_conversion_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:00:14,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:00:14,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:00:14,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:00:14,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:00:14,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:00:14,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:00:14,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:00:14,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:00:14,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:00:14,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:00:14,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:00:14,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:00:14,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:00:14,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:00:14,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:00:14,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:00:14,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:00:14,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:00:14,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:00:14,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:00:14,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:00:14,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:00:14,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:00:14,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:00:14,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:00:14,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:00:14,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:00:14,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:00:14,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:00:14,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:00:14,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:00:14,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:00:14,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:00:14,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:00:14,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:00:14,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:00:14,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:00:14,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:00:14,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:00:14,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:00:14,846 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 20:00:14,900 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:00:14,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:00:14,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:00:14,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:00:14,906 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:00:14,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:00:14,907 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:00:14,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:00:14,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:00:14,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:00:14,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:00:14,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:00:14,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:00:14,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:00:14,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:00:14,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:00:14,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:00:14,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:00:14,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:00:14,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:00:14,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:00:14,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:00:14,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:00:14,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:00:14,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:00:14,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:00:14,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:00:14,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:00:14,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:00:14,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:00:15,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:00:15,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:00:15,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:00:15,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:00:15,423 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:00:15,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/num_conversion_1.c [2020-10-26 20:00:15,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0331d60a/220795e797834b14bf51fe60e2bfa605/FLAG0b6b2c426 [2020-10-26 20:00:16,189 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:00:16,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/num_conversion_1.c [2020-10-26 20:00:16,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0331d60a/220795e797834b14bf51fe60e2bfa605/FLAG0b6b2c426 [2020-10-26 20:00:16,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0331d60a/220795e797834b14bf51fe60e2bfa605 [2020-10-26 20:00:16,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:00:16,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:00:16,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:00:16,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:00:16,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:00:16,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:00:16" (1/1) ... [2020-10-26 20:00:16,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b49fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16, skipping insertion in model container [2020-10-26 20:00:16,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:00:16" (1/1) ... [2020-10-26 20:00:16,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:00:16,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:00:16,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:00:16,821 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:00:16,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:00:16,857 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:00:16,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16 WrapperNode [2020-10-26 20:00:16,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:00:16,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:00:16,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:00:16,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:00:16,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16" (1/1) ... [2020-10-26 20:00:16,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16" (1/1) ... [2020-10-26 20:00:16,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16" (1/1) ... [2020-10-26 20:00:16,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16" (1/1) ... [2020-10-26 20:00:16,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16" (1/1) ... [2020-10-26 20:00:16,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16" (1/1) ... [2020-10-26 20:00:16,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16" (1/1) ... [2020-10-26 20:00:16,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:00:16,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:00:16,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:00:16,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:00:16,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16" (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 20:00:17,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:00:17,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:00:17,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:00:17,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 20:00:17,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:00:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:00:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:00:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:00:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:00:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:00:17,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 20:00:17,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:00:17,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:00:17,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:00:17,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:00:17,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:00:17,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:00:17,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:00:17,280 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:00:17,280 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:00:17,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:00:17 BoogieIcfgContainer [2020-10-26 20:00:17,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:00:17,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:00:17,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:00:17,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:00:17,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:00:16" (1/3) ... [2020-10-26 20:00:17,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cc1062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:00:17, skipping insertion in model container [2020-10-26 20:00:17,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:16" (2/3) ... [2020-10-26 20:00:17,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cc1062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:00:17, skipping insertion in model container [2020-10-26 20:00:17,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:00:17" (3/3) ... [2020-10-26 20:00:17,294 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2020-10-26 20:00:17,307 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:00:17,313 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:00:17,340 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:00:17,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:00:17,417 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:00:17,417 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:00:17,417 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:00:17,417 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:00:17,417 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:00:17,417 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:00:17,418 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:00:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-26 20:00:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 20:00:17,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:17,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:17,470 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1553397026, now seen corresponding path program 1 times [2020-10-26 20:00:17,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:17,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134369182] [2020-10-26 20:00:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:17,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:17,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:17,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:00:17,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:17,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-26 20:00:17,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:00:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:17,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:00:18,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:18,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:18,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:18,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:18,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:18,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:00:18,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:18,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:18,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:18,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:18,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:18,104 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 20:00:18,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134369182] [2020-10-26 20:00:18,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:00:18,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:00:18,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348094201] [2020-10-26 20:00:18,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 20:00:18,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 20:00:18,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 20:00:18,130 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-26 20:00:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:18,193 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-26 20:00:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 20:00:18,195 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-26 20:00:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:18,203 INFO L225 Difference]: With dead ends: 38 [2020-10-26 20:00:18,204 INFO L226 Difference]: Without dead ends: 15 [2020-10-26 20:00:18,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 20:00:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-26 20:00:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-26 20:00:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-26 20:00:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-26 20:00:18,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-26 20:00:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:18,251 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-26 20:00:18,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 20:00:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-26 20:00:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 20:00:18,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:18,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:18,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:00:18,253 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:18,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:18,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1868317687, now seen corresponding path program 1 times [2020-10-26 20:00:18,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:18,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078529756] [2020-10-26 20:00:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:18,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:18,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:18,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:00:18,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:18,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 20:00:18,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:18,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:00:18,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:18,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:00:18,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:18,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:18,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:18,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:18,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:18,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:00:18,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:18,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:18,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:18,552 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 20:00:18,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078529756] [2020-10-26 20:00:18,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:00:18,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:00:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001950376] [2020-10-26 20:00:18,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:00:18,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:18,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:00:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:00:18,561 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-26 20:00:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:18,671 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-26 20:00:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:00:18,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-26 20:00:18,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:18,673 INFO L225 Difference]: With dead ends: 24 [2020-10-26 20:00:18,673 INFO L226 Difference]: Without dead ends: 18 [2020-10-26 20:00:18,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:00:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-26 20:00:18,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-26 20:00:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-26 20:00:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-26 20:00:18,683 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-26 20:00:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:18,683 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-26 20:00:18,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:00:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-26 20:00:18,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 20:00:18,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:18,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:18,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:00:18,685 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:18,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1031623051, now seen corresponding path program 1 times [2020-10-26 20:00:18,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:18,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101041181] [2020-10-26 20:00:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:18,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:18,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:18,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 20:00:18,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:18,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 20:00:18,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 20:00:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:18,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 20:00:18,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:00:18,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:18,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:18,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:18,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:00:18,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:18,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101041181] [2020-10-26 20:00:18,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:18,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:00:18,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233395792] [2020-10-26 20:00:18,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:00:18,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:00:18,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:00:18,958 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-26 20:00:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:19,097 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-26 20:00:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:00:19,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-26 20:00:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:19,099 INFO L225 Difference]: With dead ends: 27 [2020-10-26 20:00:19,099 INFO L226 Difference]: Without dead ends: 21 [2020-10-26 20:00:19,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:00:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-26 20:00:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-26 20:00:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-26 20:00:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-26 20:00:19,108 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-26 20:00:19,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:19,109 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-26 20:00:19,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:00:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-26 20:00:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 20:00:19,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:19,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:19,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:00:19,124 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash -101010231, now seen corresponding path program 2 times [2020-10-26 20:00:19,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:19,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439871530] [2020-10-26 20:00:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:19,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:19,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:19,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 20:00:19,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:19,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 20:00:19,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:19,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:00:19,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:19,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 20:00:19,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:19,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:19,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:19,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:19,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:19,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:19,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:00:19,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:19,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:19,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:19,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439871530] [2020-10-26 20:00:19,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:19,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:00:19,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092451037] [2020-10-26 20:00:19,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:00:19,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:19,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:00:19,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:00:19,418 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-26 20:00:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:19,612 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-26 20:00:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:00:19,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-26 20:00:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:19,613 INFO L225 Difference]: With dead ends: 30 [2020-10-26 20:00:19,614 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 20:00:19,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:00:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 20:00:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-26 20:00:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 20:00:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-26 20:00:19,622 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-26 20:00:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:19,622 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-26 20:00:19,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:00:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-26 20:00:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 20:00:19,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:19,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:19,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:00:19,624 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:19,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1116036917, now seen corresponding path program 3 times [2020-10-26 20:00:19,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:19,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774719121] [2020-10-26 20:00:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:19,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:19,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:19,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 20:00:19,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 20:00:19,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:19,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:00:19,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:19,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:00:19,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:19,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:19,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:19,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:19,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:19,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:19,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:00:19,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:19,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:19,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:19,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:19,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:19,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774719121] [2020-10-26 20:00:19,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:19,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:00:19,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828649892] [2020-10-26 20:00:19,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:00:19,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:00:19,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:00:19,923 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-26 20:00:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:20,171 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-26 20:00:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:00:20,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-26 20:00:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:20,173 INFO L225 Difference]: With dead ends: 33 [2020-10-26 20:00:20,173 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 20:00:20,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:00:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 20:00:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-26 20:00:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 20:00:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-26 20:00:20,187 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2020-10-26 20:00:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:20,187 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-26 20:00:20,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:00:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-26 20:00:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 20:00:20,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:20,189 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:20,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:00:20,190 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1088691593, now seen corresponding path program 4 times [2020-10-26 20:00:20,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:20,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985839128] [2020-10-26 20:00:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:20,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:20,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:20,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 20:00:20,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:20,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 20:00:20,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:00:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:00:20,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:20,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:20,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:20,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:20,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:20,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:20,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:00:20,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:20,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:20,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985839128] [2020-10-26 20:00:20,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:20,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:00:20,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669636537] [2020-10-26 20:00:20,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:00:20,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:20,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:00:20,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:00:20,504 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-10-26 20:00:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:20,824 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-26 20:00:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:00:20,825 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-26 20:00:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:20,826 INFO L225 Difference]: With dead ends: 36 [2020-10-26 20:00:20,826 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 20:00:20,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:00:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 20:00:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-26 20:00:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 20:00:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-26 20:00:20,835 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2020-10-26 20:00:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:20,835 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-26 20:00:20,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:00:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-26 20:00:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 20:00:20,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:20,837 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:20,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:00:20,837 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash -779124725, now seen corresponding path program 5 times [2020-10-26 20:00:20,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:20,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331864108] [2020-10-26 20:00:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:20,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:20,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:20,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 20:00:20,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:20,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-26 20:00:20,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 20:00:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:00:21,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:21,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:21,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:21,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:21,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:21,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:21,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:00:21,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:21,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:21,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:21,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:21,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:21,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331864108] [2020-10-26 20:00:21,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:21,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:00:21,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626395306] [2020-10-26 20:00:21,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:00:21,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:21,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:00:21,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:00:21,158 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-26 20:00:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:21,582 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-26 20:00:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:00:21,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-26 20:00:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:21,584 INFO L225 Difference]: With dead ends: 39 [2020-10-26 20:00:21,584 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 20:00:21,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:00:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 20:00:21,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-26 20:00:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 20:00:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-26 20:00:21,602 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2020-10-26 20:00:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:21,602 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-26 20:00:21,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:00:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-26 20:00:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 20:00:21,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:21,603 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:21,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:00:21,605 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash 701232713, now seen corresponding path program 6 times [2020-10-26 20:00:21,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:21,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115467264] [2020-10-26 20:00:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:21,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:21,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:21,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 20:00:21,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:21,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 20:00:21,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:00:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:00:21,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:21,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:21,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:21,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:21,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:21,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:21,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:00:21,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:21,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:22,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115467264] [2020-10-26 20:00:22,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:22,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:00:22,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812454899] [2020-10-26 20:00:22,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:00:22,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:22,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:00:22,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:00:22,005 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 10 states. [2020-10-26 20:00:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:22,534 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-26 20:00:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:00:22,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-26 20:00:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:22,536 INFO L225 Difference]: With dead ends: 42 [2020-10-26 20:00:22,536 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 20:00:22,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-26 20:00:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 20:00:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 20:00:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 20:00:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-26 20:00:22,556 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 30 [2020-10-26 20:00:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:22,557 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-26 20:00:22,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:00:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-26 20:00:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 20:00:22,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:22,558 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:22,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:00:22,559 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:22,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1305472843, now seen corresponding path program 7 times [2020-10-26 20:00:22,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:22,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582005407] [2020-10-26 20:00:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:22,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:22,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:22,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 20:00:22,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:22,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-26 20:00:22,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:00:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 20:00:22,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:23,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:23,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:23,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:23,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:23,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:23,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:00:23,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:23,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:23,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582005407] [2020-10-26 20:00:23,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:23,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 20:00:23,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974122707] [2020-10-26 20:00:23,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 20:00:23,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:23,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 20:00:23,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:00:23,036 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 11 states. [2020-10-26 20:00:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:23,704 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-26 20:00:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:00:23,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-26 20:00:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:23,705 INFO L225 Difference]: With dead ends: 43 [2020-10-26 20:00:23,705 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 20:00:23,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:00:23,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 20:00:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-26 20:00:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 20:00:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-26 20:00:23,724 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 33 [2020-10-26 20:00:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:23,724 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-26 20:00:23,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 20:00:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-26 20:00:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 20:00:23,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:23,725 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:23,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:00:23,726 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2015248137, now seen corresponding path program 8 times [2020-10-26 20:00:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:23,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6080399] [2020-10-26 20:00:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 20:00:23,765 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-26 20:00:23,765 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 20:00:23,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:00:23,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:00:23 BoogieIcfgContainer [2020-10-26 20:00:23,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 20:00:23,794 INFO L168 Benchmark]: Toolchain (without parser) took 7236.26 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 132.5 MB in the beginning and 197.3 MB in the end (delta: -64.8 MB). Peak memory consumption was 126.6 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:23,795 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 151.0 MB. Free memory was 123.2 MB in the beginning and 123.1 MB in the end (delta: 130.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-26 20:00:23,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.35 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 122.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:23,799 INFO L168 Benchmark]: Boogie Preprocessor took 71.69 ms. Allocated memory is still 151.0 MB. Free memory was 122.6 MB in the beginning and 134.8 MB in the end (delta: -12.2 MB). Peak memory consumption was 4.0 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:23,803 INFO L168 Benchmark]: RCFGBuilder took 348.10 ms. Allocated memory is still 151.0 MB. Free memory was 134.8 MB in the beginning and 121.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:23,804 INFO L168 Benchmark]: TraceAbstraction took 6506.11 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 121.5 MB in the beginning and 197.3 MB in the end (delta: -75.8 MB). Peak memory consumption was 116.3 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:23,816 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 151.0 MB. Free memory was 123.2 MB in the beginning and 123.1 MB in the end (delta: 130.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 295.35 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 122.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.69 ms. Allocated memory is still 151.0 MB. Free memory was 122.6 MB in the beginning and 134.8 MB in the end (delta: -12.2 MB). Peak memory consumption was 4.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 348.10 ms. Allocated memory is still 151.0 MB. Free memory was 134.8 MB in the beginning and 121.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6506.11 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 121.5 MB in the beginning and 197.3 MB in the end (delta: -75.8 MB). Peak memory consumption was 116.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 24, overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L16] unsigned char x; [L17] unsigned char y; [L18] unsigned char c; [L20] x = 37 [L21] y = 0 [L22] c = 0 [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND FALSE !(c < (unsigned char)8) [L31] CALL __VERIFIER_assert(x == y) [L7] COND TRUE !(cond) [L8] CALL reach_error() [L3] __assert_fail("0", "num_conversion_1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.3s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 167 SDtfs, 307 SDslu, 181 SDs, 0 SdLazy, 721 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 14 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 34395 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 0/196 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...