/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:49:49,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:49:49,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:49:49,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:49:49,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:49:49,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:49:49,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:49:49,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:49:49,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:49:49,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:49:49,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:49:49,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:49:49,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:49:49,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:49:49,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:49:49,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:49:49,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:49:49,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:49:49,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:49:49,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:49:49,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:49:49,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:49:49,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:49:49,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:49:49,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:49:49,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:49:49,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:49:49,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:49:49,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:49:49,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:49:49,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:49:49,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:49:49,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:49:49,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:49:49,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:49:49,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:49:49,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:49:49,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:49:49,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:49:49,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:49:49,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:49:49,159 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 21:49:49,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:49:49,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:49:49,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:49:49,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:49:49,187 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:49:49,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:49:49,187 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:49:49,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:49:49,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:49:49,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:49:49,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:49:49,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:49:49,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:49:49,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:49:49,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:49:49,189 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:49:49,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:49:49,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:49:49,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:49:49,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:49:49,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:49:49,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:49:49,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:49:49,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:49:49,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:49:49,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:49:49,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:49:49,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:49:49,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:49:49,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:49:49,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:49:49,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:49:49,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:49:49,754 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:49:49,756 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:49:49,757 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-24 21:49:49,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b05f8f111/ce5e040b36514847832a27f00a05699a/FLAG65f3f1f8c [2020-09-24 21:49:50,406 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:49:50,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-24 21:49:50,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b05f8f111/ce5e040b36514847832a27f00a05699a/FLAG65f3f1f8c [2020-09-24 21:49:50,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b05f8f111/ce5e040b36514847832a27f00a05699a [2020-09-24 21:49:50,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:49:50,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:49:50,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:49:50,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:49:50,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:49:50,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:49:50" (1/1) ... [2020-09-24 21:49:50,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5264e6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:50, skipping insertion in model container [2020-09-24 21:49:50,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:49:50" (1/1) ... [2020-09-24 21:49:50,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:49:50,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:49:51,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:49:51,161 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:49:51,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:49:51,201 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:49:51,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51 WrapperNode [2020-09-24 21:49:51,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:49:51,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:49:51,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:49:51,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:49:51,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51" (1/1) ... [2020-09-24 21:49:51,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51" (1/1) ... [2020-09-24 21:49:51,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51" (1/1) ... [2020-09-24 21:49:51,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51" (1/1) ... [2020-09-24 21:49:51,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51" (1/1) ... [2020-09-24 21:49:51,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51" (1/1) ... [2020-09-24 21:49:51,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51" (1/1) ... [2020-09-24 21:49:51,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:49:51,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:49:51,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:49:51,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:49:51,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51" (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 21:49:51,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:49:51,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:49:51,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:49:51,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:49:51,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:49:51,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:49:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:49:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:49:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:49:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:49:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:49:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:49:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:49:51,640 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:49:51,641 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:49:51,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:51 BoogieIcfgContainer [2020-09-24 21:49:51,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:49:51,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:49:51,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:49:51,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:49:51,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:49:50" (1/3) ... [2020-09-24 21:49:51,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53466c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:51, skipping insertion in model container [2020-09-24 21:49:51,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:51" (2/3) ... [2020-09-24 21:49:51,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53466c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:51, skipping insertion in model container [2020-09-24 21:49:51,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:51" (3/3) ... [2020-09-24 21:49:51,656 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-24 21:49:51,668 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:49:51,679 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:49:51,701 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:49:51,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:49:51,731 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:49:51,731 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:49:51,731 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:49:51,731 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:49:51,731 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:49:51,731 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:49:51,732 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:49:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-24 21:49:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 21:49:51,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:51,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:51,760 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:51,767 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-09-24 21:49:51,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:51,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913214866] [2020-09-24 21:49:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:51,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:51,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:52,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:52,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:49:52,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:52,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-24 21:49:52,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:49:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:49:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:49:52,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:49:52,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:52,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:52,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:52,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:49:52,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:52,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:49:52,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:52,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:52,175 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 21:49:52,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913214866] [2020-09-24 21:49:52,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:49:52,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:49:52,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807252743] [2020-09-24 21:49:52,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:49:52,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:52,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:49:52,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:49:52,211 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2020-09-24 21:49:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:52,323 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-09-24 21:49:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:49:52,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 21:49:52,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:52,342 INFO L225 Difference]: With dead ends: 70 [2020-09-24 21:49:52,342 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 21:49:52,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:49:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 21:49:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-24 21:49:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 21:49:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-24 21:49:52,407 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-09-24 21:49:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:52,407 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-24 21:49:52,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:49:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-24 21:49:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 21:49:52,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:52,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:52,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:49:52,410 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-09-24 21:49:52,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:52,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79304887] [2020-09-24 21:49:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:52,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:52,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:52,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:49:52,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:52,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-09-24 21:49:52,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:49:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:49:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:49:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:52,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:52,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:52,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:52,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:49:52,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:52,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:49:52,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:52,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:52,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:52,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:52,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:52,675 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 21:49:52,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79304887] [2020-09-24 21:49:52,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:49:52,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 21:49:52,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063680847] [2020-09-24 21:49:52,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:49:52,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:52,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:49:52,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:49:52,679 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-09-24 21:49:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:52,811 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-24 21:49:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:49:52,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-24 21:49:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:52,818 INFO L225 Difference]: With dead ends: 42 [2020-09-24 21:49:52,818 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 21:49:52,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:49:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 21:49:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-24 21:49:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 21:49:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-24 21:49:52,846 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-09-24 21:49:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:52,846 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-24 21:49:52,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:49:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-24 21:49:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 21:49:52,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:52,850 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:49:52,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:49:52,851 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:52,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-09-24 21:49:52,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:52,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373869903] [2020-09-24 21:49:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:52,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:53,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:53,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:53,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 21:49:53,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:53,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-09-24 21:49:53,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:53,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:49:53,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:49:53,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:49:53,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:53,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:53,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:53,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:53,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:49:53,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:53,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:49:53,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:53,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:53,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:53,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-24 21:49:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:53,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:53,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:53,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:53,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:53,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:53,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 21:49:53,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:49:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:49:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:53,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373869903] [2020-09-24 21:49:53,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:53,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:49:53,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370789554] [2020-09-24 21:49:53,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:49:53,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:49:53,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:49:53,939 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 10 states. [2020-09-24 21:49:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:54,235 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-24 21:49:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:49:54,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-24 21:49:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:54,237 INFO L225 Difference]: With dead ends: 46 [2020-09-24 21:49:54,237 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 21:49:54,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:49:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 21:49:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-09-24 21:49:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 21:49:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-24 21:49:54,256 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 28 [2020-09-24 21:49:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:54,258 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-24 21:49:54,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:49:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-24 21:49:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 21:49:54,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:54,261 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 21:49:54,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:49:54,262 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:54,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:54,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-09-24 21:49:54,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:54,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881681677] [2020-09-24 21:49:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:49:54,286 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:49:54,286 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:49:54,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:49:54,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:49:54 BoogieIcfgContainer [2020-09-24 21:49:54,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:49:54,322 INFO L168 Benchmark]: Toolchain (without parser) took 3538.91 ms. Allocated memory was 138.4 MB in the beginning and 231.7 MB in the end (delta: 93.3 MB). Free memory was 101.6 MB in the beginning and 127.7 MB in the end (delta: -26.1 MB). Peak memory consumption was 67.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:54,323 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 21:49:54,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.04 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 91.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:54,326 INFO L168 Benchmark]: Boogie Preprocessor took 122.31 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 178.9 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:54,328 INFO L168 Benchmark]: RCFGBuilder took 321.96 ms. Allocated memory is still 200.3 MB. Free memory was 178.2 MB in the beginning and 164.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:54,334 INFO L168 Benchmark]: TraceAbstraction took 2669.32 ms. Allocated memory was 200.3 MB in the beginning and 231.7 MB in the end (delta: 31.5 MB). Free memory was 164.3 MB in the beginning and 127.7 MB in the end (delta: 36.5 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:54,346 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 410.04 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 91.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.31 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 178.9 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.96 ms. Allocated memory is still 200.3 MB. Free memory was 178.2 MB in the beginning and 164.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2669.32 ms. Allocated memory was 200.3 MB in the beginning and 231.7 MB in the end (delta: 31.5 MB). Free memory was 164.3 MB in the beginning and 127.7 MB in the end (delta: 36.5 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i