/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:08:37,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:08:37,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:08:37,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:08:37,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:08:37,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:08:37,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:08:37,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:08:37,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:08:37,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:08:37,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:08:37,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:08:37,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:08:37,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:08:37,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:08:37,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:08:37,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:08:37,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:08:37,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:08:37,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:08:37,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:08:37,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:08:37,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:08:37,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:08:37,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:08:37,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:08:37,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:08:37,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:08:37,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:08:37,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:08:37,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:08:37,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:08:37,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:08:37,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:08:37,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:08:37,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:08:37,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:08:37,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:08:37,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:08:37,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:08:37,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:08:37,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 00:08:37,166 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:08:37,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:08:37,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:08:37,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:08:37,169 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:08:37,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:08:37,170 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:08:37,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:08:37,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:08:37,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:08:37,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:08:37,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:08:37,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:08:37,173 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:08:37,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:08:37,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:08:37,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:08:37,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:08:37,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:08:37,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:08:37,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:08:37,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:08:37,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:08:37,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:08:37,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:08:37,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:08:37,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:08:37,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:08:37,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:08:37,176 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:08:37,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:08:37,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:08:37,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:08:37,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:08:37,507 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:08:37,508 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-10-15 00:08:37,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58a46d958/3716541b1a6f49bd82a6f88a45c28ac4/FLAG46c51eec4 [2020-10-15 00:08:38,049 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:08:38,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-10-15 00:08:38,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58a46d958/3716541b1a6f49bd82a6f88a45c28ac4/FLAG46c51eec4 [2020-10-15 00:08:38,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58a46d958/3716541b1a6f49bd82a6f88a45c28ac4 [2020-10-15 00:08:38,436 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:08:38,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:08:38,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:08:38,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:08:38,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:08:38,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:38" (1/1) ... [2020-10-15 00:08:38,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c3b431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38, skipping insertion in model container [2020-10-15 00:08:38,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:38" (1/1) ... [2020-10-15 00:08:38,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:08:38,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:08:38,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:08:38,642 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:08:38,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:08:38,675 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:08:38,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38 WrapperNode [2020-10-15 00:08:38,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:08:38,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:08:38,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:08:38,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:08:38,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38" (1/1) ... [2020-10-15 00:08:38,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38" (1/1) ... [2020-10-15 00:08:38,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38" (1/1) ... [2020-10-15 00:08:38,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38" (1/1) ... [2020-10-15 00:08:38,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38" (1/1) ... [2020-10-15 00:08:38,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38" (1/1) ... [2020-10-15 00:08:38,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38" (1/1) ... [2020-10-15 00:08:38,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:08:38,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:08:38,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:08:38,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:08:38,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:08:38,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:08:38,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:08:38,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 00:08:38,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:08:38,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:08:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:08:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 00:08:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 00:08:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:08:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-15 00:08:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:08:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:08:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:08:39,044 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:08:39,044 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-15 00:08:39,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:39 BoogieIcfgContainer [2020-10-15 00:08:39,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:08:39,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:08:39,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:08:39,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:08:39,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:38" (1/3) ... [2020-10-15 00:08:39,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b26587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:39, skipping insertion in model container [2020-10-15 00:08:39,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:38" (2/3) ... [2020-10-15 00:08:39,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b26587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:39, skipping insertion in model container [2020-10-15 00:08:39,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:39" (3/3) ... [2020-10-15 00:08:39,057 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-10-15 00:08:39,068 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:08:39,075 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:08:39,102 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:08:39,152 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:08:39,152 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:08:39,153 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:08:39,153 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:08:39,153 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:08:39,153 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:08:39,154 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:08:39,154 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:08:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-15 00:08:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 00:08:39,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:39,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:39,193 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:39,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1474053726, now seen corresponding path program 1 times [2020-10-15 00:08:39,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:39,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703468360] [2020-10-15 00:08:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:39,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:39,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:39,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:39,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-15 00:08:39,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:08:39,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-15 00:08:39,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:39,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:39,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:08:39,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:08:39,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:08:39,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:08:39,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:39,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:39,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:39,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:39,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:39,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:08:39,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:39,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:39,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:39,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:39,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:39,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:39,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703468360] [2020-10-15 00:08:39,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:08:39,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:08:39,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938414134] [2020-10-15 00:08:39,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:08:39,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:39,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:08:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:08:39,588 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-10-15 00:08:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:39,672 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2020-10-15 00:08:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:08:39,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-15 00:08:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:39,685 INFO L225 Difference]: With dead ends: 48 [2020-10-15 00:08:39,685 INFO L226 Difference]: Without dead ends: 20 [2020-10-15 00:08:39,689 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 [2020-10-15 00:08:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-15 00:08:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-15 00:08:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-15 00:08:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-15 00:08:39,727 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-10-15 00:08:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:39,728 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-15 00:08:39,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:08:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-15 00:08:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 00:08:39,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:39,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:39,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:08:39,730 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1463775831, now seen corresponding path program 1 times [2020-10-15 00:08:39,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:39,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431663888] [2020-10-15 00:08:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:39,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:39,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-15 00:08:39,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:39,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-15 00:08:39,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:39,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:08:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:08:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:08:39,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:39,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:39,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:39,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:39,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:39,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:08:39,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:39,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:39,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:39,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:39,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431663888] [2020-10-15 00:08:39,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:08:39,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 00:08:39,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762640947] [2020-10-15 00:08:39,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:08:39,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:39,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:08:39,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:08:39,952 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-10-15 00:08:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:40,037 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-15 00:08:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:08:40,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-15 00:08:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:40,039 INFO L225 Difference]: With dead ends: 28 [2020-10-15 00:08:40,039 INFO L226 Difference]: Without dead ends: 26 [2020-10-15 00:08:40,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:08:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-15 00:08:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-15 00:08:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 00:08:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-15 00:08:40,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2020-10-15 00:08:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:40,050 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-15 00:08:40,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:08:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-15 00:08:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:08:40,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:40,052 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:40,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:08:40,052 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash -541842987, now seen corresponding path program 1 times [2020-10-15 00:08:40,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:40,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217428131] [2020-10-15 00:08:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:40,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:40,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:40,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:08:40,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:08:40,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-15 00:08:40,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:40,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:40,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:08:40,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:08:40,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:08:40,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:40,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:40,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:40,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:40,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:40,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:40,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:08:40,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:40,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:40,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:40,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:40,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:40,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:08:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:40,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:40,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:40,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:40,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:08:40,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:08:40,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 00:08:40,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:40,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:08:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:08:40,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:40,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217428131] [2020-10-15 00:08:40,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:08:40,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 00:08:40,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325361762] [2020-10-15 00:08:40,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:08:40,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:40,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:08:40,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:08:40,547 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-10-15 00:08:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:40,650 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-15 00:08:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:08:40,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-15 00:08:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:40,652 INFO L225 Difference]: With dead ends: 32 [2020-10-15 00:08:40,652 INFO L226 Difference]: Without dead ends: 28 [2020-10-15 00:08:40,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:08:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-15 00:08:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-15 00:08:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 00:08:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-15 00:08:40,661 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2020-10-15 00:08:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:40,661 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-15 00:08:40,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:08:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-15 00:08:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:08:40,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:40,663 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] [2020-10-15 00:08:40,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:08:40,664 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:40,664 INFO L82 PathProgramCache]: Analyzing trace with hash 814692392, now seen corresponding path program 1 times [2020-10-15 00:08:40,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:40,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193348247] [2020-10-15 00:08:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 00:08:40,675 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-15 00:08:40,675 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 00:08:40,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:08:40,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 12:08:40 BoogieIcfgContainer [2020-10-15 00:08:40,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 00:08:40,701 INFO L168 Benchmark]: Toolchain (without parser) took 2261.80 ms. Allocated memory was 149.4 MB in the beginning and 231.7 MB in the end (delta: 82.3 MB). Free memory was 105.3 MB in the beginning and 164.5 MB in the end (delta: -59.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-10-15 00:08:40,702 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 149.4 MB. Free memory was 124.0 MB in the beginning and 123.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-10-15 00:08:40,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.14 ms. Allocated memory is still 149.4 MB. Free memory was 104.9 MB in the beginning and 95.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-15 00:08:40,704 INFO L168 Benchmark]: Boogie Preprocessor took 110.88 ms. Allocated memory was 149.4 MB in the beginning and 205.5 MB in the end (delta: 56.1 MB). Free memory was 95.4 MB in the beginning and 184.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-15 00:08:40,705 INFO L168 Benchmark]: RCFGBuilder took 261.12 ms. Allocated memory is still 205.5 MB. Free memory was 184.0 MB in the beginning and 171.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-10-15 00:08:40,706 INFO L168 Benchmark]: TraceAbstraction took 1647.94 ms. Allocated memory was 205.5 MB in the beginning and 231.7 MB in the end (delta: 26.2 MB). Free memory was 170.3 MB in the beginning and 164.5 MB in the end (delta: 5.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. [2020-10-15 00:08:40,710 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 149.4 MB. Free memory was 124.0 MB in the beginning and 123.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.14 ms. Allocated memory is still 149.4 MB. Free memory was 104.9 MB in the beginning and 95.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.88 ms. Allocated memory was 149.4 MB in the beginning and 205.5 MB in the end (delta: 56.1 MB). Free memory was 95.4 MB in the beginning and 184.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.12 ms. Allocated memory is still 205.5 MB. Free memory was 184.0 MB in the beginning and 171.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1647.94 ms. Allocated memory was 205.5 MB in the beginning and 231.7 MB in the end (delta: 26.2 MB). Free memory was 170.3 MB in the beginning and 164.5 MB in the end (delta: 5.8 MB). Peak memory consumption was 32.0 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