/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:42:25,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:42:25,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:42:25,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:42:25,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:42:25,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:42:25,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:42:25,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:42:25,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:42:25,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:42:25,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:42:25,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:42:25,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:42:25,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:42:25,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:42:25,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:42:25,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:42:25,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:42:25,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:42:25,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:42:25,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:42:25,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:42:25,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:42:25,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:42:25,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:42:25,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:42:25,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:42:25,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:42:25,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:42:25,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:42:25,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:42:25,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:42:25,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:42:25,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:42:25,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:42:25,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:42:25,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:42:25,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:42:25,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:42:25,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:42:25,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:42:25,870 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 [2020-09-24 20:42:25,922 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:42:25,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:42:25,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:42:25,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:42:25,924 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:42:25,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:42:25,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:42:25,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:42:25,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:42:25,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:42:25,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:42:25,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:42:25,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:42:25,929 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:42:25,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:42:25,931 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:42:25,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:42:25,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:42:25,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:42:25,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:42:25,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:42:25,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:42:25,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:42:25,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:42:25,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:42:25,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:42:25,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:42:25,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:42:25,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:42:25,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=true; [2020-09-24 20:42:26,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:42:26,415 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:42:26,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:42:26,424 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:42:26,426 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:42:26,427 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-09-24 20:42:26,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5077717c3/c53ea4a327b64550aaaff93dae90c2be/FLAG17971dfa0 [2020-09-24 20:42:27,079 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:42:27,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-09-24 20:42:27,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5077717c3/c53ea4a327b64550aaaff93dae90c2be/FLAG17971dfa0 [2020-09-24 20:42:27,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5077717c3/c53ea4a327b64550aaaff93dae90c2be [2020-09-24 20:42:27,423 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:42:27,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:42:27,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:42:27,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:42:27,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:42:27,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27, skipping insertion in model container [2020-09-24 20:42:27,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:42:27,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:42:27,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:42:27,727 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:42:27,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:42:27,881 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:42:27,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27 WrapperNode [2020-09-24 20:42:27,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:42:27,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:42:27,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:42:27,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:42:27,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:42:27,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:42:27,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:42:27,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:42:27,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (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 [2020-09-24 20:42:28,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:42:28,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:42:28,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:42:28,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:42:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:42:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:42:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:42:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:42:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 20:42:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:42:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:42:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:42:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:42:28,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:42:28,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:42:28,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:42:28,435 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:42:28,436 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:42:28,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:28 BoogieIcfgContainer [2020-09-24 20:42:28,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:42:28,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:42:28,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:42:28,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:42:28,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:42:27" (1/3) ... [2020-09-24 20:42:28,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65850573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:28, skipping insertion in model container [2020-09-24 20:42:28,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (2/3) ... [2020-09-24 20:42:28,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65850573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:28, skipping insertion in model container [2020-09-24 20:42:28,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:28" (3/3) ... [2020-09-24 20:42:28,453 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2020-09-24 20:42:28,465 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:42:28,476 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-09-24 20:42:28,499 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-24 20:42:28,527 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:42:28,528 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:42:28,528 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:42:28,528 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:42:28,528 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:42:28,528 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:42:28,528 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:42:28,528 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:42:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states. [2020-09-24 20:42:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 20:42:28,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:28,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:28,561 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:28,568 INFO L82 PathProgramCache]: Analyzing trace with hash 477414535, now seen corresponding path program 1 times [2020-09-24 20:42:28,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:28,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832227524] [2020-09-24 20:42:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:28,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:28,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:29,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:29,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 20:42:29,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:29,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-09-24 20:42:29,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:42:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-24 20:42:29,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 20:42:29,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:42:29,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:29,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:29,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 20:42:29,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:29,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 20:42:29,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:29,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:29,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:29,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:29,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:29,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832227524] [2020-09-24 20:42:29,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:29,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:42:29,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554803736] [2020-09-24 20:42:29,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:42:29,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:42:29,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:42:29,310 INFO L87 Difference]: Start difference. First operand 103 states. Second operand 5 states. [2020-09-24 20:42:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:29,788 INFO L93 Difference]: Finished difference Result 223 states and 250 transitions. [2020-09-24 20:42:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:42:29,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-24 20:42:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:29,807 INFO L225 Difference]: With dead ends: 223 [2020-09-24 20:42:29,807 INFO L226 Difference]: Without dead ends: 116 [2020-09-24 20:42:29,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:42:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-24 20:42:29,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2020-09-24 20:42:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-24 20:42:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-09-24 20:42:29,876 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 30 [2020-09-24 20:42:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:29,877 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-09-24 20:42:29,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:42:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-09-24 20:42:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 20:42:29,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:29,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:29,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:42:29,880 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:29,880 INFO L82 PathProgramCache]: Analyzing trace with hash -921386779, now seen corresponding path program 1 times [2020-09-24 20:42:29,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:29,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031786397] [2020-09-24 20:42:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 20:42:30,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:30,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-24 20:42:30,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:42:30,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 20:42:30,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:30,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:30,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:30,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 20:42:30,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:30,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:42:30,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:30,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:30,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031786397] [2020-09-24 20:42:30,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:30,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 20:42:30,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418156684] [2020-09-24 20:42:30,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:42:30,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:42:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:42:30,199 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 6 states. [2020-09-24 20:42:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:30,443 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-09-24 20:42:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:42:30,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-09-24 20:42:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:30,447 INFO L225 Difference]: With dead ends: 93 [2020-09-24 20:42:30,447 INFO L226 Difference]: Without dead ends: 91 [2020-09-24 20:42:30,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:42:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-24 20:42:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-09-24 20:42:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 20:42:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-09-24 20:42:30,468 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 31 [2020-09-24 20:42:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:30,469 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-09-24 20:42:30,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:42:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-09-24 20:42:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 20:42:30,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:30,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:30,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:42:30,473 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:30,473 INFO L82 PathProgramCache]: Analyzing trace with hash -223412704, now seen corresponding path program 1 times [2020-09-24 20:42:30,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:30,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174153688] [2020-09-24 20:42:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:30,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 20:42:30,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:30,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-24 20:42:30,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:30,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 20:42:30,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:42:30,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:30,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 20:42:30,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:30,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 20:42:30,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:30,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:30,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:30,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:30,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174153688] [2020-09-24 20:42:30,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:30,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 20:42:30,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212413135] [2020-09-24 20:42:30,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 20:42:30,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 20:42:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 20:42:30,758 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 4 states. [2020-09-24 20:42:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:30,940 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-09-24 20:42:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 20:42:30,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-09-24 20:42:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:30,945 INFO L225 Difference]: With dead ends: 101 [2020-09-24 20:42:30,945 INFO L226 Difference]: Without dead ends: 84 [2020-09-24 20:42:30,947 INFO L675 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 [2020-09-24 20:42:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-24 20:42:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-09-24 20:42:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 20:42:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-09-24 20:42:30,968 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 33 [2020-09-24 20:42:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:30,968 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-09-24 20:42:30,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 20:42:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-09-24 20:42:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 20:42:30,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:30,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:30,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:42:30,972 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:30,973 INFO L82 PathProgramCache]: Analyzing trace with hash 276122014, now seen corresponding path program 1 times [2020-09-24 20:42:30,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:30,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233859830] [2020-09-24 20:42:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:31,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:31,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 20:42:31,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 20:42:31,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-09-24 20:42:31,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:31,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:42:31,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 20:42:31,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 20:42:31,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:32,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:32,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:32,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:32,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 20:42:32,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:32,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 20:42:32,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:32,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:32,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:32,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:32,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:32,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233859830] [2020-09-24 20:42:32,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:32,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 20:42:32,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977104122] [2020-09-24 20:42:32,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:42:32,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:42:32,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:42:32,105 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 7 states. [2020-09-24 20:42:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:32,442 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2020-09-24 20:42:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 20:42:32,443 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-09-24 20:42:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:32,445 INFO L225 Difference]: With dead ends: 170 [2020-09-24 20:42:32,445 INFO L226 Difference]: Without dead ends: 128 [2020-09-24 20:42:32,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:42:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-24 20:42:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 72. [2020-09-24 20:42:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 20:42:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-24 20:42:32,454 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 52 [2020-09-24 20:42:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:32,455 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-24 20:42:32,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:42:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-24 20:42:32,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 20:42:32,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:32,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:32,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:42:32,458 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:32,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:32,458 INFO L82 PathProgramCache]: Analyzing trace with hash -94524522, now seen corresponding path program 1 times [2020-09-24 20:42:32,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:32,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457470155] [2020-09-24 20:42:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:32,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:32,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:32,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 20:42:32,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:32,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-24 20:42:32,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:42:32,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-24 20:42:32,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:32,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:32,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:32,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:32,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:32,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 20:42:32,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:32,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:42:32,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:32,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457470155] [2020-09-24 20:42:32,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:32,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 20:42:32,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503319238] [2020-09-24 20:42:32,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:42:32,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:32,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:42:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:42:32,696 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 6 states. [2020-09-24 20:42:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:32,917 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-09-24 20:42:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 20:42:32,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-09-24 20:42:32,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:32,919 INFO L225 Difference]: With dead ends: 108 [2020-09-24 20:42:32,920 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 20:42:32,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:42:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 20:42:32,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-24 20:42:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 20:42:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-09-24 20:42:32,927 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 53 [2020-09-24 20:42:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:32,928 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-09-24 20:42:32,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:42:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-09-24 20:42:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 20:42:32,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:32,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:32,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:42:32,930 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:32,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2013372873, now seen corresponding path program 1 times [2020-09-24 20:42:32,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:32,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424923475] [2020-09-24 20:42:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:33,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:33,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:34,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:34,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 20:42:34,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:34,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1736 [2020-09-24 20:42:34,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:34,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:42:34,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 20:42:34,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 20:42:34,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:35,267 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2020-09-24 20:42:35,518 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 62 [2020-09-24 20:42:36,008 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 69 [2020-09-24 20:42:36,265 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 60 [2020-09-24 20:42:36,506 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 64 [2020-09-24 20:42:36,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:36,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:36,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 20:42:36,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:36,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 20:42:36,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:36,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:36,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:36,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:36,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:36,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424923475] [2020-09-24 20:42:36,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:36,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-24 20:42:36,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691727473] [2020-09-24 20:42:36,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 20:42:36,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:36,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 20:42:36,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:42:36,786 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 14 states. [2020-09-24 20:42:37,385 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-09-24 20:42:41,742 WARN L193 SmtUtils]: Spent 4.31 s on a formula simplification that was a NOOP. DAG size: 91 [2020-09-24 20:42:46,081 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification that was a NOOP. DAG size: 93 [2020-09-24 20:42:46,246 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-09-24 20:42:46,419 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-09-24 20:42:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:46,612 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-09-24 20:42:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:42:46,617 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-09-24 20:42:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:46,619 INFO L225 Difference]: With dead ends: 94 [2020-09-24 20:42:46,619 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 20:42:46,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-09-24 20:42:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 20:42:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2020-09-24 20:42:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-24 20:42:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-09-24 20:42:46,628 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 55 [2020-09-24 20:42:46,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:46,629 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-09-24 20:42:46,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 20:42:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-09-24 20:42:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 20:42:46,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:46,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:46,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:42:46,631 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:46,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:46,631 INFO L82 PathProgramCache]: Analyzing trace with hash 511170824, now seen corresponding path program 1 times [2020-09-24 20:42:46,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:46,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682481353] [2020-09-24 20:42:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:46,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:47,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:48,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:51,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:51,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 20:42:51,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:42:51,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-24 20:42:51,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:42:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 20:42:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 20:42:51,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-09-24 20:42:55,477 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 43 [2020-09-24 20:43:13,074 WARN L193 SmtUtils]: Spent 14.69 s on a formula simplification. DAG size of input: 236 DAG size of output: 59 [2020-09-24 20:43:32,262 WARN L193 SmtUtils]: Spent 16.91 s on a formula simplification. DAG size of input: 262 DAG size of output: 75