/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:20:28,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:20:28,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:20:28,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:20:28,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:20:28,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:20:28,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:20:28,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:20:28,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:20:28,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:20:28,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:20:28,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:20:28,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:20:28,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:20:28,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:20:28,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:20:28,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:20:28,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:20:28,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:20:28,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:20:28,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:20:28,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:20:28,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:20:28,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:20:28,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:20:28,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:20:28,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:20:28,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:20:28,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:20:28,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:20:28,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:20:28,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:20:28,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:20:28,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:20:28,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:20:28,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:20:28,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:20:28,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:20:28,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:20:28,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:20:28,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:20:28,092 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 17:20:28,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:20:28,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:20:28,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:20:28,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:20:28,134 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:20:28,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:20:28,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:20:28,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:20:28,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:20:28,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:20:28,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:20:28,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:20:28,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:20:28,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:20:28,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:20:28,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:20:28,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:20:28,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:20:28,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:20:28,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:20:28,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:20:28,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:20:28,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:20:28,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:20:28,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:20:28,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:20:28,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:20:28,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:20:28,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:20:28,142 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;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;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;log-additional-information=true; [2020-09-24 17:20:28,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:20:28,669 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:20:28,673 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:20:28,675 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:20:28,677 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:20:28,679 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-24 17:20:28,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/584e4a0ff/b9c115aa1cbf4325b7d91e4aa138d6c0/FLAG51c8ad703 [2020-09-24 17:20:29,283 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:20:29,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-24 17:20:29,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/584e4a0ff/b9c115aa1cbf4325b7d91e4aa138d6c0/FLAG51c8ad703 [2020-09-24 17:20:29,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/584e4a0ff/b9c115aa1cbf4325b7d91e4aa138d6c0 [2020-09-24 17:20:29,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:20:29,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:20:29,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:29,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:20:29,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:20:29,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:29" (1/1) ... [2020-09-24 17:20:29,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb9461a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:29, skipping insertion in model container [2020-09-24 17:20:29,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:29" (1/1) ... [2020-09-24 17:20:29,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:20:29,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:20:29,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:29,970 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:20:30,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:30,025 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:20:30,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30 WrapperNode [2020-09-24 17:20:30,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:30,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:20:30,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:20:30,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:20:30,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:20:30,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:20:30,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:20:30,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:20:30,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (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 17:20:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:20:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:20:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 17:20:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:20:30,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:20:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:20:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 17:20:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 17:20:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:20:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 17:20:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:20:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 17:20:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 17:20:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 17:20:30,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:20:30,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:20:30,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:20:30,667 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:20:30,668 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-24 17:20:30,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:30 BoogieIcfgContainer [2020-09-24 17:20:30,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:20:30,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:20:30,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:20:30,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:20:30,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:20:29" (1/3) ... [2020-09-24 17:20:30,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c008b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:30, skipping insertion in model container [2020-09-24 17:20:30,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (2/3) ... [2020-09-24 17:20:30,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c008b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:30, skipping insertion in model container [2020-09-24 17:20:30,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:30" (3/3) ... [2020-09-24 17:20:30,685 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-24 17:20:30,705 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:20:30,725 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:20:30,748 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:20:30,784 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:20:30,784 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:20:30,784 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:20:30,785 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:20:30,785 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:20:30,785 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:20:30,785 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:20:30,785 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:20:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-24 17:20:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 17:20:30,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:30,824 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] [2020-09-24 17:20:30,824 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:30,831 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-24 17:20:30,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:30,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709428971] [2020-09-24 17:20:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:31,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,367 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:31,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 17:20:31,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:20:31,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-09-24 17:20:31,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 17:20:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:31,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:20:31,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:31,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,448 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:31,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:31,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:31,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:20:31,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:31,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:31,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:31,469 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 17:20:31,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709428971] [2020-09-24 17:20:31,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:31,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:20:31,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913749678] [2020-09-24 17:20:31,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:20:31,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:31,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:20:31,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:20:31,506 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-24 17:20:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:31,799 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-24 17:20:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:20:31,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-24 17:20:31,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:31,814 INFO L225 Difference]: With dead ends: 188 [2020-09-24 17:20:31,814 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 17:20:31,819 INFO L675 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 [2020-09-24 17:20:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 17:20:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-24 17:20:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 17:20:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-24 17:20:31,875 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-24 17:20:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:31,876 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-24 17:20:31,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:20:31,876 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-24 17:20:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 17:20:31,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:31,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:31,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:20:31,879 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-24 17:20:31,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:31,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006172864] [2020-09-24 17:20:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:31,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,147 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 17:20:32,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:32,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-09-24 17:20:32,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:20:32,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 17:20:32,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 17:20:32,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:32,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,194 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:32,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:32,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:20:32,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:32,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:32,201 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 17:20:32,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006172864] [2020-09-24 17:20:32,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:32,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:20:32,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95876956] [2020-09-24 17:20:32,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:20:32,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:32,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:20:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:20:32,206 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-24 17:20:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:32,388 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-24 17:20:32,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 17:20:32,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-24 17:20:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:32,390 INFO L225 Difference]: With dead ends: 144 [2020-09-24 17:20:32,390 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 17:20:32,392 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 17:20:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 17:20:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-24 17:20:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 17:20:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-24 17:20:32,404 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-24 17:20:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:32,404 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-24 17:20:32,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:20:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-24 17:20:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 17:20:32,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:32,407 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 17:20:32,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:20:32,407 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:32,408 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-24 17:20:32,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:32,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524282925] [2020-09-24 17:20:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,162 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 17:20:33,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:33,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-09-24 17:20:33,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:33,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 17:20:33,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:20:33,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:33,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,236 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:33,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:20:33,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:33,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:20:33,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524282925] [2020-09-24 17:20:33,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:33,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:20:33,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343916770] [2020-09-24 17:20:33,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:20:33,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:33,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:20:33,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:20:33,255 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-24 17:20:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:33,508 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2020-09-24 17:20:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:20:33,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-24 17:20:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:33,510 INFO L225 Difference]: With dead ends: 140 [2020-09-24 17:20:33,510 INFO L226 Difference]: Without dead ends: 96 [2020-09-24 17:20:33,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:20:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-24 17:20:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-24 17:20:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 17:20:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-24 17:20:33,521 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-24 17:20:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:33,521 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-24 17:20:33,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:20:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-24 17:20:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 17:20:33,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:33,524 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 17:20:33,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:20:33,525 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1625165933, now seen corresponding path program 2 times [2020-09-24 17:20:33,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:33,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083187730] [2020-09-24 17:20:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,411 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 17:20:34,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:34,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-09-24 17:20:34,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:20:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 17:20:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 17:20:34,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:34,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,495 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:34,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:20:34,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:34,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:20:34,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083187730] [2020-09-24 17:20:34,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:34,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:20:34,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667422211] [2020-09-24 17:20:34,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:20:34,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:34,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:20:34,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:20:34,507 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-24 17:20:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:34,793 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2020-09-24 17:20:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:20:34,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-24 17:20:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:34,796 INFO L225 Difference]: With dead ends: 147 [2020-09-24 17:20:34,796 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 17:20:34,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:20:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 17:20:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-24 17:20:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 17:20:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-24 17:20:34,807 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-24 17:20:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:34,808 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-24 17:20:34,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:20:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-24 17:20:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 17:20:34,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:34,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:34,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:20:34,810 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2072721689, now seen corresponding path program 3 times [2020-09-24 17:20:34,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:34,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516281045] [2020-09-24 17:20:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,092 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:36,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 17:20:36,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:36,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1267 [2020-09-24 17:20:36,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:36,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:36,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 17:20:36,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:20:36,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,149 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:36,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:36,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:36,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:20:36,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:36,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:36,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:36,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 17:20:36,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516281045] [2020-09-24 17:20:36,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:36,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:20:36,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707149945] [2020-09-24 17:20:36,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:20:36,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:20:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:20:36,166 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 6 states. [2020-09-24 17:20:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:36,383 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-09-24 17:20:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:20:36,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-09-24 17:20:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:36,386 INFO L225 Difference]: With dead ends: 175 [2020-09-24 17:20:36,386 INFO L226 Difference]: Without dead ends: 105 [2020-09-24 17:20:36,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:20:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-24 17:20:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-09-24 17:20:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 17:20:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-24 17:20:36,409 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-24 17:20:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:36,410 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-24 17:20:36,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:20:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-24 17:20:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 17:20:36,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:36,418 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:36,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:20:36,418 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 662513150, now seen corresponding path program 4 times [2020-09-24 17:20:36,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:36,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292532967] [2020-09-24 17:20:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:38,368 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:38,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 17:20:38,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:38,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1921 [2020-09-24 17:20:38,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:38,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:20:38,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 17:20:38,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 17:20:38,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:38,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:38,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:38,456 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:38,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:38,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:38,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:20:38,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:38,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:38,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:38,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:38,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 17:20:38,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292532967] [2020-09-24 17:20:38,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:38,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:20:38,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320109590] [2020-09-24 17:20:38,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:20:38,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:20:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:20:38,478 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 8 states. [2020-09-24 17:20:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:38,694 INFO L93 Difference]: Finished difference Result 182 states and 192 transitions. [2020-09-24 17:20:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:20:38,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-09-24 17:20:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:38,696 INFO L225 Difference]: With dead ends: 182 [2020-09-24 17:20:38,696 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 17:20:38,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:20:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 17:20:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-24 17:20:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 17:20:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-24 17:20:38,705 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-24 17:20:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:38,705 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-24 17:20:38,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:20:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-24 17:20:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 17:20:38,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:38,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:38,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:20:38,707 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash -600384135, now seen corresponding path program 5 times [2020-09-24 17:20:38,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:38,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616364813] [2020-09-24 17:20:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:38,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:38,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:41,454 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:41,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 17:20:41,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:41,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2729 [2020-09-24 17:20:41,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:20:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 17:20:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 17:20:41,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:41,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:41,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:41,538 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:41,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:41,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:41,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:20:41,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:41,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 17:20:41,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616364813] [2020-09-24 17:20:41,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:41,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:20:41,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684684635] [2020-09-24 17:20:41,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:20:41,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:41,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:20:41,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:20:41,550 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 10 states. [2020-09-24 17:20:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:41,796 INFO L93 Difference]: Finished difference Result 189 states and 199 transitions. [2020-09-24 17:20:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:20:41,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-09-24 17:20:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:41,798 INFO L225 Difference]: With dead ends: 189 [2020-09-24 17:20:41,798 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 17:20:41,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:20:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 17:20:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-24 17:20:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 17:20:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-24 17:20:41,806 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-24 17:20:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:41,806 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-24 17:20:41,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:20:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-24 17:20:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 17:20:41,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:41,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:41,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:20:41,809 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash -173943394, now seen corresponding path program 6 times [2020-09-24 17:20:41,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:41,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170922465] [2020-09-24 17:20:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:41,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:41,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:45,170 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:45,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 17:20:45,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:45,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3345 [2020-09-24 17:20:45,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:45,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:20:45,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-09-24 17:20:45,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 17:20:45,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:45,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:45,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:45,282 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:45,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:45,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:45,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:20:45,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:45,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:45,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:45,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:45,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-24 17:20:45,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170922465] [2020-09-24 17:20:45,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:45,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:20:45,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013487553] [2020-09-24 17:20:45,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:20:45,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:45,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:20:45,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:20:45,298 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 10 states. [2020-09-24 17:20:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:45,643 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-24 17:20:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:20:45,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 90 [2020-09-24 17:20:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:45,645 INFO L225 Difference]: With dead ends: 170 [2020-09-24 17:20:45,645 INFO L226 Difference]: Without dead ends: 126 [2020-09-24 17:20:45,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:20:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-24 17:20:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-24 17:20:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-24 17:20:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-24 17:20:45,659 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-24 17:20:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:45,659 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-24 17:20:45,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:20:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-24 17:20:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 17:20:45,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:45,664 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:45,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:20:45,664 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:45,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:45,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1831436462, now seen corresponding path program 7 times [2020-09-24 17:20:45,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:45,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904770542] [2020-09-24 17:20:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:45,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:45,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:49,656 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:49,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 17:20:49,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:49,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3972 [2020-09-24 17:20:49,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:20:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 17:20:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:20:49,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:49,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:49,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:49,763 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:49,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:49,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:49,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:20:49,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:49,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:49,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-24 17:20:49,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904770542] [2020-09-24 17:20:49,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:49,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:20:49,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040376473] [2020-09-24 17:20:49,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:20:49,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:20:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:20:49,778 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 12 states. [2020-09-24 17:20:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:50,136 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-09-24 17:20:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 17:20:50,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-09-24 17:20:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:50,138 INFO L225 Difference]: With dead ends: 205 [2020-09-24 17:20:50,138 INFO L226 Difference]: Without dead ends: 128 [2020-09-24 17:20:50,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 17:20:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-24 17:20:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-09-24 17:20:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-24 17:20:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-24 17:20:50,145 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-24 17:20:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:50,145 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-24 17:20:50,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:20:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-24 17:20:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-24 17:20:50,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:50,148 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:50,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 17:20:50,148 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:50,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1354290195, now seen corresponding path program 8 times [2020-09-24 17:20:50,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:50,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53934964] [2020-09-24 17:20:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:50,663 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:50,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-24 17:20:50,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:50,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-09-24 17:20:50,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:50,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:20:50,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-24 17:20:50,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:20:50,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:50,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:50,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:50,799 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:50,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:50,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:50,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:20:50,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:50,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:50,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:50,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:50,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 17:20:50,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53934964] [2020-09-24 17:20:50,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:50,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:20:50,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944070840] [2020-09-24 17:20:50,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:20:50,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:20:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:20:50,821 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-24 17:20:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:51,224 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-09-24 17:20:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 17:20:51,225 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-24 17:20:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:51,226 INFO L225 Difference]: With dead ends: 179 [2020-09-24 17:20:51,227 INFO L226 Difference]: Without dead ends: 135 [2020-09-24 17:20:51,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 17:20:51,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-24 17:20:51,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-24 17:20:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-24 17:20:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-24 17:20:51,235 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-24 17:20:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:51,236 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-24 17:20:51,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:20:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-24 17:20:51,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-24 17:20:51,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:51,238 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:51,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 17:20:51,239 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:51,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-24 17:20:51,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:51,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350700874] [2020-09-24 17:20:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 17:20:51,286 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 17:20:51,287 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 17:20:51,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 17:20:51,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 05:20:51 BoogieIcfgContainer [2020-09-24 17:20:51,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 17:20:51,330 INFO L168 Benchmark]: Toolchain (without parser) took 21686.67 ms. Allocated memory was 146.8 MB in the beginning and 367.5 MB in the end (delta: 220.7 MB). Free memory was 103.4 MB in the beginning and 334.6 MB in the end (delta: -231.2 MB). Peak memory consumption was 233.7 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:51,331 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 17:20:51,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.62 ms. Allocated memory is still 146.8 MB. Free memory was 102.7 MB in the beginning and 92.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:51,333 INFO L168 Benchmark]: Boogie Preprocessor took 159.94 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.1 MB in the beginning and 180.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:51,334 INFO L168 Benchmark]: RCFGBuilder took 483.64 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 155.3 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:51,334 INFO L168 Benchmark]: TraceAbstraction took 20649.45 ms. Allocated memory was 202.9 MB in the beginning and 367.5 MB in the end (delta: 164.6 MB). Free memory was 154.6 MB in the beginning and 334.6 MB in the end (delta: -179.9 MB). Peak memory consumption was 228.9 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:51,338 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 378.62 ms. Allocated memory is still 146.8 MB. Free memory was 102.7 MB in the beginning and 92.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 159.94 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.1 MB in the beginning and 180.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 483.64 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 155.3 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20649.45 ms. Allocated memory was 202.9 MB in the beginning and 367.5 MB in the end (delta: 164.6 MB). Free memory was 154.6 MB in the beginning and 334.6 MB in the end (delta: -179.9 MB). Peak memory consumption was 228.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 58. Possible FailurePath: [L20] char string_A[5], string_B[5]; [L21] int i, j, nc_A, nc_B, found=0; [L24] i=0 [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND FALSE !(i<5) [L26] EXPR string_A[5 -1] [L26] COND FALSE !(!(string_A[5 -1]=='\0')) [L28] i=0 [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND FALSE !(i<5) [L30] EXPR string_B[5 -1] [L30] COND FALSE !(!(string_B[5 -1]=='\0')) [L32] nc_A = 0 [L33] EXPR string_A[nc_A] [L33] COND FALSE !(string_A[nc_A]!='\0') [L36] nc_B = 0 [L37] EXPR string_B[nc_B] [L37] COND FALSE !(string_B[nc_B]!='\0') [L40] COND FALSE !(!(nc_B >= nc_A)) [L43] EXPR j=0 [L43] i=j=0 [L44] COND FALSE !((inc_B-1)<