/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:52:14,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:52:14,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:52:14,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:52:14,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:52:14,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:52:14,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:52:14,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:52:14,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:52:14,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:52:14,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:52:14,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:52:14,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:52:14,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:52:14,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:52:14,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:52:14,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:52:14,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:52:14,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:52:14,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:52:14,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:52:14,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:52:14,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:52:14,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:52:14,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:52:14,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:52:14,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:52:14,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:52:14,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:52:14,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:52:14,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:52:14,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:52:14,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:52:14,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:52:14,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:52:14,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:52:14,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:52:14,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:52:14,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:52:14,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:52:14,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:52:14,229 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 [2020-09-25 06:52:14,260 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:52:14,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:52:14,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:52:14,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:52:14,262 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:52:14,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:52:14,262 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:52:14,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:52:14,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:52:14,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:52:14,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:52:14,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:52:14,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:52:14,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:52:14,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:52:14,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:52:14,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:52:14,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:52:14,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:52:14,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:52:14,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:52:14,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:52:14,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:52:14,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:52:14,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:52:14,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:52:14,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:52:14,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:52:14,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:52:14,268 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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:52:14,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:52:14,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:52:14,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:52:14,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:52:14,800 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:52:14,801 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-09-25 06:52:14,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be4d3e865/a703651b087f492da80a39fa05c176a5/FLAG3875f6404 [2020-09-25 06:52:15,440 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:52:15,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-1.i [2020-09-25 06:52:15,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be4d3e865/a703651b087f492da80a39fa05c176a5/FLAG3875f6404 [2020-09-25 06:52:15,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be4d3e865/a703651b087f492da80a39fa05c176a5 [2020-09-25 06:52:15,798 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:52:15,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:52:15,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:52:15,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:52:15,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:52:15,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:15" (1/1) ... [2020-09-25 06:52:15,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:15, skipping insertion in model container [2020-09-25 06:52:15,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:15" (1/1) ... [2020-09-25 06:52:15,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:52:15,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:52:16,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:52:16,101 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:52:16,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:52:16,162 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:52:16,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16 WrapperNode [2020-09-25 06:52:16,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:52:16,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:52:16,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:52:16,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:52:16,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:52:16,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:52:16,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:52:16,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:52:16,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:52:16,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:52:16,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:52:16,384 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:52:16,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 06:52:16,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:52:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:52:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:52:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:52:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 06:52:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 06:52:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:52:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 06:52:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 06:52:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 06:52:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 06:52:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:52:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:52:16,842 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:52:16,842 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-25 06:52:16,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:16 BoogieIcfgContainer [2020-09-25 06:52:16,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:52:16,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:52:16,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:52:16,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:52:16,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:52:15" (1/3) ... [2020-09-25 06:52:16,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddd5f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:16, skipping insertion in model container [2020-09-25 06:52:16,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (2/3) ... [2020-09-25 06:52:16,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddd5f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:16, skipping insertion in model container [2020-09-25 06:52:16,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:16" (3/3) ... [2020-09-25 06:52:16,860 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-09-25 06:52:16,872 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:52:16,881 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:52:16,901 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:52:16,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:52:16,933 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:52:16,934 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:52:16,934 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:52:16,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:52:16,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:52:16,934 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:52:16,934 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:52:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-25 06:52:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 06:52:16,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:16,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:16,972 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:16,979 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-25 06:52:16,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:16,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831985110] [2020-09-25 06:52:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:17,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:17,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 06:52:17,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 06:52:17,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-09-25 06:52:17,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:17,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:17,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:17,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-25 06:52:17,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:17,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:52:17,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:17,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:17,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:17,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:17,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 06:52:17,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:17,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:17,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:17,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:17,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:17,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:17,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831985110] [2020-09-25 06:52:17,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:17,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 06:52:17,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57894192] [2020-09-25 06:52:17,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 06:52:17,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:17,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 06:52:17,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:52:17,814 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-25 06:52:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:18,087 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-25 06:52:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 06:52:18,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 06:52:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:18,103 INFO L225 Difference]: With dead ends: 188 [2020-09-25 06:52:18,103 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 06:52:18,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:52:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 06:52:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-25 06:52:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 06:52:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-25 06:52:18,187 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-25 06:52:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:18,188 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-25 06:52:18,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 06:52:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-25 06:52:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 06:52:18,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:18,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:18,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:52:18,191 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:18,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-25 06:52:18,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:18,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600247000] [2020-09-25 06:52:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:18,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:18,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 06:52:18,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:52:18,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-09-25 06:52:18,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:18,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:18,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:52:18,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 06:52:18,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 06:52:18,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:18,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:18,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:18,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:18,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:18,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:52:18,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:18,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:18,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:18,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:18,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:18,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:18,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600247000] [2020-09-25 06:52:18,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:18,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:52:18,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831101276] [2020-09-25 06:52:18,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:52:18,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:18,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:52:18,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:52:18,702 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-25 06:52:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:18,881 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-25 06:52:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:52:18,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 06:52:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:18,883 INFO L225 Difference]: With dead ends: 144 [2020-09-25 06:52:18,883 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 06:52:18,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:52:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 06:52:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-25 06:52:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 06:52:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-25 06:52:18,896 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-25 06:52:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:18,897 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-25 06:52:18,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:52:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-25 06:52:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 06:52:18,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:18,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:18,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:52:18,900 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:18,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:18,901 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-25 06:52:18,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:18,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106601692] [2020-09-25 06:52:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:18,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:19,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:20,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:20,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 06:52:20,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:52:20,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1513 [2020-09-25 06:52:20,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:20,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:20,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:52:20,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 06:52:20,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 06:52:20,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:20,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:20,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:20,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:20,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:20,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:52:20,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:20,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:20,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:20,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:20,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:20,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:52:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 06:52:20,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106601692] [2020-09-25 06:52:20,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:20,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 06:52:20,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399159827] [2020-09-25 06:52:20,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:52:20,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:52:20,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:52:20,536 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-25 06:52:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:20,776 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-09-25 06:52:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 06:52:20,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-25 06:52:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:20,778 INFO L225 Difference]: With dead ends: 152 [2020-09-25 06:52:20,778 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 06:52:20,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 06:52:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-25 06:52:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 06:52:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-25 06:52:20,788 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-25 06:52:20,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:20,789 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-25 06:52:20,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:52:20,789 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-25 06:52:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 06:52:20,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:20,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:20,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:52:20,792 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:20,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1958895614, now seen corresponding path program 2 times [2020-09-25 06:52:20,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:20,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158475135] [2020-09-25 06:52:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:20,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:20,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:22,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:22,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 06:52:22,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:52:22,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2112 [2020-09-25 06:52:22,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:22,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:52:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 06:52:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:52:22,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:23,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:23,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:23,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:23,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:23,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:23,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:52:23,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:23,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:23,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:23,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 06:52:23,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158475135] [2020-09-25 06:52:23,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:23,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:52:23,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791674828] [2020-09-25 06:52:23,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:52:23,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:23,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:52:23,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:23,035 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-25 06:52:23,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:23,294 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2020-09-25 06:52:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 06:52:23,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-25 06:52:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:23,296 INFO L225 Difference]: With dead ends: 159 [2020-09-25 06:52:23,296 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 06:52:23,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:52:23,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 06:52:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-25 06:52:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 06:52:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-25 06:52:23,306 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-25 06:52:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:23,306 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-25 06:52:23,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:52:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-25 06:52:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 06:52:23,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:23,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:23,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:52:23,309 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash -699729223, now seen corresponding path program 3 times [2020-09-25 06:52:23,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:23,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217555944] [2020-09-25 06:52:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:23,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:23,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:24,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:26,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:26,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 06:52:26,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:52:26,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3132 [2020-09-25 06:52:26,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:26,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:26,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:52:26,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-25 06:52:26,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 06:52:26,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:26,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:26,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:26,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:26,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:26,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:26,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:52:26,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:26,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:26,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:26,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:26,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:26,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 06:52:26,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217555944] [2020-09-25 06:52:26,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:26,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 06:52:26,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973138473] [2020-09-25 06:52:26,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:52:26,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:26,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:52:26,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:52:26,549 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 6 states. [2020-09-25 06:52:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:26,732 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2020-09-25 06:52:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 06:52:26,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-09-25 06:52:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:26,734 INFO L225 Difference]: With dead ends: 149 [2020-09-25 06:52:26,735 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 06:52:26,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 06:52:26,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-09-25 06:52:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 06:52:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-25 06:52:26,744 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-25 06:52:26,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:26,744 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-25 06:52:26,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:52:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-25 06:52:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 06:52:26,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:26,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:26,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:52:26,746 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1399032013, now seen corresponding path program 4 times [2020-09-25 06:52:26,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:26,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900078338] [2020-09-25 06:52:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:26,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:26,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:27,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:31,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:31,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 06:52:31,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:52:31,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4471 [2020-09-25 06:52:31,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:31,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:31,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:52:31,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-25 06:52:31,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:52:31,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 06:52:31,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:31,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:31,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:31,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:31,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:52:31,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:31,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:31,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:31,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:31,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:31,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 06:52:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 06:52:31,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900078338] [2020-09-25 06:52:31,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:31,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:52:31,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405872667] [2020-09-25 06:52:31,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:52:31,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:31,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:52:31,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:31,442 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 8 states. [2020-09-25 06:52:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:31,738 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2020-09-25 06:52:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 06:52:31,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-09-25 06:52:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:31,740 INFO L225 Difference]: With dead ends: 156 [2020-09-25 06:52:31,740 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 06:52:31,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:52:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 06:52:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-25 06:52:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 06:52:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 06:52:31,754 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-25 06:52:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:31,755 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 06:52:31,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:52:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 06:52:31,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 06:52:31,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:31,760 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:31,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 06:52:31,760 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash -600384135, now seen corresponding path program 5 times [2020-09-25 06:52:31,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:31,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275276629] [2020-09-25 06:52:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:31,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:31,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:33,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:36,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:36,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-25 06:52:36,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:52:36,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 06:52:36,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:36,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:36,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:52:36,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-09-25 06:52:36,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 06:52:36,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:36,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:36,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:36,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:36,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:36,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:36,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:52:36,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:36,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:36,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:36,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:36,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:36,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-09-25 06:52:36,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275276629] [2020-09-25 06:52:36,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:36,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 06:52:36,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717722251] [2020-09-25 06:52:36,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:52:36,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:36,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:52:36,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:52:36,887 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 6 states. [2020-09-25 06:52:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:37,055 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-09-25 06:52:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:52:37,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-09-25 06:52:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:37,056 INFO L225 Difference]: With dead ends: 107 [2020-09-25 06:52:37,056 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 06:52:37,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 06:52:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 06:52:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 06:52:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 06:52:37,058 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2020-09-25 06:52:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:37,059 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 06:52:37,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:52:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 06:52:37,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 06:52:37,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 06:52:37,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 06:52:37,151 INFO L268 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-09-25 06:52:37,151 INFO L268 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-09-25 06:52:37,151 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-25 06:52:37,151 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-25 06:52:37,152 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 06:52:37,152 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 06:52:37,152 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 06:52:37,152 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 06:52:37,152 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 06:52:37,152 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-09-25 06:52:37,152 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 06:52:37,152 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-09-25 06:52:37,153 INFO L268 CegarLoopResult]: For program point L5-3(lines 4 6) no Hoare annotation was computed. [2020-09-25 06:52:37,153 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-09-25 06:52:37,153 INFO L268 CegarLoopResult]: For program point L35-2(line 35) no Hoare annotation was computed. [2020-09-25 06:52:37,153 INFO L268 CegarLoopResult]: For program point L35-4(line 35) no Hoare annotation was computed. [2020-09-25 06:52:37,153 INFO L264 CegarLoopResult]: At program point L35-5(lines 35 36) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-09-25 06:52:37,153 INFO L268 CegarLoopResult]: For program point L35-6(lines 18 61) no Hoare annotation was computed. [2020-09-25 06:52:37,154 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-25 06:52:37,154 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-09-25 06:52:37,154 INFO L268 CegarLoopResult]: For program point L27-2(line 27) no Hoare annotation was computed. [2020-09-25 06:52:37,154 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-09-25 06:52:37,154 INFO L268 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-09-25 06:52:37,154 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,154 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,155 INFO L268 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,155 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,155 INFO L268 CegarLoopResult]: For program point L19-4(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,155 INFO L268 CegarLoopResult]: For program point L19-5(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,155 INFO L268 CegarLoopResult]: For program point L19-6(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,155 INFO L268 CegarLoopResult]: For program point L19-7(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,155 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-09-25 06:52:37,155 INFO L268 CegarLoopResult]: For program point L19-8(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,156 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-09-25 06:52:37,156 INFO L268 CegarLoopResult]: For program point L19-9(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,156 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 53) no Hoare annotation was computed. [2020-09-25 06:52:37,156 INFO L268 CegarLoopResult]: For program point L19-10(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,156 INFO L268 CegarLoopResult]: For program point L44-3(line 44) no Hoare annotation was computed. [2020-09-25 06:52:37,156 INFO L268 CegarLoopResult]: For program point L19-11(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,157 INFO L268 CegarLoopResult]: For program point L44-4(line 44) no Hoare annotation was computed. [2020-09-25 06:52:37,157 INFO L268 CegarLoopResult]: For program point L19-12(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,157 INFO L268 CegarLoopResult]: For program point L19-13(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,157 INFO L268 CegarLoopResult]: For program point L44-6(line 44) no Hoare annotation was computed. [2020-09-25 06:52:37,157 INFO L268 CegarLoopResult]: For program point L44-7(line 44) no Hoare annotation was computed. [2020-09-25 06:52:37,157 INFO L268 CegarLoopResult]: For program point L19-14(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,157 INFO L268 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-09-25 06:52:37,158 INFO L264 CegarLoopResult]: At program point L44-8(lines 42 54) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-09-25 06:52:37,158 INFO L268 CegarLoopResult]: For program point L19-15(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,158 INFO L268 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-09-25 06:52:37,158 INFO L268 CegarLoopResult]: For program point L19-16(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,158 INFO L268 CegarLoopResult]: For program point L36-2(line 36) no Hoare annotation was computed. [2020-09-25 06:52:37,158 INFO L268 CegarLoopResult]: For program point L19-17(line 19) no Hoare annotation was computed. [2020-09-25 06:52:37,158 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-09-25 06:52:37,159 INFO L268 CegarLoopResult]: For program point L28-1(line 28) no Hoare annotation was computed. [2020-09-25 06:52:37,159 INFO L268 CegarLoopResult]: For program point L28-2(line 28) no Hoare annotation was computed. [2020-09-25 06:52:37,159 INFO L268 CegarLoopResult]: For program point L28-3(line 28) no Hoare annotation was computed. [2020-09-25 06:52:37,159 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 06:52:37,159 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-25 06:52:37,159 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-25 06:52:37,159 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-09-25 06:52:37,160 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-09-25 06:52:37,160 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-09-25 06:52:37,160 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-09-25 06:52:37,160 INFO L268 CegarLoopResult]: For program point L46-2(line 46) no Hoare annotation was computed. [2020-09-25 06:52:37,160 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-09-25 06:52:37,160 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-09-25 06:52:37,160 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-25 06:52:37,160 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-25 06:52:37,161 INFO L268 CegarLoopResult]: For program point L22-3(lines 22 23) no Hoare annotation was computed. [2020-09-25 06:52:37,161 INFO L268 CegarLoopResult]: For program point L22-4(line 22) no Hoare annotation was computed. [2020-09-25 06:52:37,161 INFO L268 CegarLoopResult]: For program point L22-5(line 22) no Hoare annotation was computed. [2020-09-25 06:52:37,161 INFO L264 CegarLoopResult]: At program point L22-6(lines 22 23) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-09-25 06:52:37,161 INFO L268 CegarLoopResult]: For program point L22-7(lines 22 23) no Hoare annotation was computed. [2020-09-25 06:52:37,161 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-09-25 06:52:37,161 INFO L268 CegarLoopResult]: For program point L47-1(line 47) no Hoare annotation was computed. [2020-09-25 06:52:37,162 INFO L268 CegarLoopResult]: For program point L47-2(line 47) no Hoare annotation was computed. [2020-09-25 06:52:37,162 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-09-25 06:52:37,162 INFO L268 CegarLoopResult]: For program point L31-2(line 31) no Hoare annotation was computed. [2020-09-25 06:52:37,162 INFO L268 CegarLoopResult]: For program point L31-4(line 31) no Hoare annotation was computed. [2020-09-25 06:52:37,162 INFO L264 CegarLoopResult]: At program point L31-5(lines 31 32) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-09-25 06:52:37,162 INFO L268 CegarLoopResult]: For program point L31-6(lines 31 32) no Hoare annotation was computed. [2020-09-25 06:52:37,163 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-09-25 06:52:37,163 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-25 06:52:37,163 INFO L268 CegarLoopResult]: For program point L23-2(line 23) no Hoare annotation was computed. [2020-09-25 06:52:37,163 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-25 06:52:37,163 INFO L268 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-09-25 06:52:37,163 INFO L268 CegarLoopResult]: For program point L32-2(line 32) no Hoare annotation was computed. [2020-09-25 06:52:37,163 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-25 06:52:37,164 INFO L268 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-09-25 06:52:37,164 INFO L268 CegarLoopResult]: For program point L24-2(line 24) no Hoare annotation was computed. [2020-09-25 06:52:37,164 INFO L268 CegarLoopResult]: For program point L24-3(line 24) no Hoare annotation was computed. [2020-09-25 06:52:37,164 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-09-25 06:52:37,164 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-09-25 06:52:37,164 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-09-25 06:52:37,165 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-09-25 06:52:37,165 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-09-25 06:52:37,165 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-25 06:52:37,165 INFO L268 CegarLoopResult]: For program point L26-3(lines 26 27) no Hoare annotation was computed. [2020-09-25 06:52:37,165 INFO L268 CegarLoopResult]: For program point L26-4(line 26) no Hoare annotation was computed. [2020-09-25 06:52:37,165 INFO L268 CegarLoopResult]: For program point L26-5(line 26) no Hoare annotation was computed. [2020-09-25 06:52:37,165 INFO L264 CegarLoopResult]: At program point L26-6(lines 26 27) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-09-25 06:52:37,165 INFO L268 CegarLoopResult]: For program point L26-7(lines 26 27) no Hoare annotation was computed. [2020-09-25 06:52:37,166 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-09-25 06:52:37,166 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-09-25 06:52:37,166 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-09-25 06:52:37,166 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-09-25 06:52:37,166 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-09-25 06:52:37,166 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-09-25 06:52:37,167 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-09-25 06:52:37,167 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-09-25 06:52:37,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:52:37 BoogieIcfgContainer [2020-09-25 06:52:37,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 06:52:37,195 INFO L168 Benchmark]: Toolchain (without parser) took 21393.43 ms. Allocated memory was 139.5 MB in the beginning and 374.3 MB in the end (delta: 234.9 MB). Free memory was 101.9 MB in the beginning and 170.3 MB in the end (delta: -68.4 MB). Peak memory consumption was 166.4 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:37,196 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 06:52:37,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.95 ms. Allocated memory is still 139.5 MB. Free memory was 101.2 MB in the beginning and 90.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:37,198 INFO L168 Benchmark]: Boogie Preprocessor took 137.03 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.1 MB in the beginning and 179.7 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:37,199 INFO L168 Benchmark]: RCFGBuilder took 548.70 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 155.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:37,200 INFO L168 Benchmark]: TraceAbstraction took 20340.74 ms. Allocated memory was 202.4 MB in the beginning and 374.3 MB in the end (delta: 172.0 MB). Free memory was 154.9 MB in the beginning and 170.3 MB in the end (delta: -15.4 MB). Peak memory consumption was 156.6 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:37,204 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.95 ms. Allocated memory is still 139.5 MB. Free memory was 101.2 MB in the beginning and 90.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.03 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.1 MB in the beginning and 179.7 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 548.70 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 155.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20340.74 ms. Allocated memory was 202.4 MB in the beginning and 374.3 MB in the end (delta: 172.0 MB). Free memory was 154.9 MB in the beginning and 170.3 MB in the end (delta: -15.4 MB). Peak memory consumption was 156.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 110 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 561 SDtfs, 171 SDslu, 1194 SDs, 0 SdLazy, 880 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 17 PreInvPairs, 28 NumberOfFragments, 58 HoareAnnotationTreeSize, 17 FomulaSimplifications, 62 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 17.9s InterpolantComputationTime, 423 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 416 ConstructedInterpolants, 0 QuantifiedInterpolants, 37346 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 98/118 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...