/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:25:07,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:25:07,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:25:07,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:25:07,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:25:07,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:25:07,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:25:07,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:25:07,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:25:07,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:25:07,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:25:07,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:25:07,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:25:07,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:25:07,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:25:07,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:25:07,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:25:07,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:25:07,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:25:07,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:25:07,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:25:07,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:25:07,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:25:07,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:25:07,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:25:07,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:25:07,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:25:07,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:25:07,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:25:07,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:25:07,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:25:07,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:25:07,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:25:07,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:25:07,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:25:07,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:25:07,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:25:07,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:25:07,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:25:07,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:25:07,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:25:07,124 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 [2020-09-21 12:25:07,150 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:25:07,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:25:07,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:25:07,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:25:07,152 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:25:07,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:25:07,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:25:07,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:25:07,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:25:07,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:25:07,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:25:07,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:25:07,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:25:07,154 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:25:07,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:25:07,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:25:07,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:25:07,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:25:07,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:25:07,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:25:07,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:25:07,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:07,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:25:07,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:25:07,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:25:07,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:25:07,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:25:07,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:25:07,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:25:07,158 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:25:07,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:25:07,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:25:07,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:25:07,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:25:07,663 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:25:07,665 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-09-21 12:25:07,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/073481c6d/47da3e5fe61443aab94da3b150e52d0c/FLAG664749335 [2020-09-21 12:25:08,301 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:25:08,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-09-21 12:25:08,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/073481c6d/47da3e5fe61443aab94da3b150e52d0c/FLAG664749335 [2020-09-21 12:25:08,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/073481c6d/47da3e5fe61443aab94da3b150e52d0c [2020-09-21 12:25:08,663 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:25:08,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:25:08,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:08,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:25:08,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:25:08,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:08" (1/1) ... [2020-09-21 12:25:08,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b40a8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:08, skipping insertion in model container [2020-09-21 12:25:08,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:08" (1/1) ... [2020-09-21 12:25:08,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:25:08,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:25:08,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:08,967 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:25:08,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:09,014 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:25:09,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09 WrapperNode [2020-09-21 12:25:09,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:09,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:25:09,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:25:09,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:25:09,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09" (1/1) ... [2020-09-21 12:25:09,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09" (1/1) ... [2020-09-21 12:25:09,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09" (1/1) ... [2020-09-21 12:25:09,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09" (1/1) ... [2020-09-21 12:25:09,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09" (1/1) ... [2020-09-21 12:25:09,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09" (1/1) ... [2020-09-21 12:25:09,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09" (1/1) ... [2020-09-21 12:25:09,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:25:09,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:25:09,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:25:09,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:25:09,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09" (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 [2020-09-21 12:25:09,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:25:09,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:25:09,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:25:09,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:25:09,223 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-21 12:25:09,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:25:09,224 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-21 12:25:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:25:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:25:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:25:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:25:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:25:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:25:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:25:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:25:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:25:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:25:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:25:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-21 12:25:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:25:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:25:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:25:09,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:25:09,574 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:25:09,574 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:25:09,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:09 BoogieIcfgContainer [2020-09-21 12:25:09,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:25:09,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:25:09,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:25:09,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:25:09,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:25:08" (1/3) ... [2020-09-21 12:25:09,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fccfb21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:09, skipping insertion in model container [2020-09-21 12:25:09,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:09" (2/3) ... [2020-09-21 12:25:09,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fccfb21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:09, skipping insertion in model container [2020-09-21 12:25:09,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:09" (3/3) ... [2020-09-21 12:25:09,592 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-09-21 12:25:09,602 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:25:09,611 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:25:09,630 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:25:09,657 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:25:09,658 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:25:09,658 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:25:09,658 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:25:09,658 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:25:09,658 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:25:09,658 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:25:09,658 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:25:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-09-21 12:25:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:25:09,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:09,690 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] [2020-09-21 12:25:09,690 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:09,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:09,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1882906983, now seen corresponding path program 1 times [2020-09-21 12:25:09,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:09,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157427555] [2020-09-21 12:25:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:09,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:09,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:10,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:10,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:25:10,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:10,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-09-21 12:25:10,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:10,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:10,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:25:10,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:10,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:25:10,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:10,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:10,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:10,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:10,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:10,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:25:10,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:10,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:10,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:10,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:10,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:10,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:25:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:10,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:10,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:10,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:25:10,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:10,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:25:10,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:10,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:10,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:25:10,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:10,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:10,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:25:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:10,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:10,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:10,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:10,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:10,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:25:10,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:10,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:10,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:25:10,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:10,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:10,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157427555] [2020-09-21 12:25:10,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:10,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:25:10,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016832822] [2020-09-21 12:25:10,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:25:10,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:25:10,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:25:10,563 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-09-21 12:25:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:10,746 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-09-21 12:25:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:25:10,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-09-21 12:25:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:10,763 INFO L225 Difference]: With dead ends: 77 [2020-09-21 12:25:10,763 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 12:25:10,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:25:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 12:25:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-21 12:25:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 12:25:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-09-21 12:25:10,833 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 24 [2020-09-21 12:25:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:10,834 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-09-21 12:25:10,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:25:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-09-21 12:25:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:25:10,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:10,838 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] [2020-09-21 12:25:10,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:25:10,838 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:10,840 INFO L82 PathProgramCache]: Analyzing trace with hash 861838629, now seen corresponding path program 1 times [2020-09-21 12:25:10,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:10,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592646745] [2020-09-21 12:25:10,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:10,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:11,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:11,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:25:11,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:11,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-09-21 12:25:11,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:11,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:25:11,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-21 12:25:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:25:11,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:25:11,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:11,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:11,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:11,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:11,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:25:11,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:11,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:11,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:25:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:11,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:11,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:11,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:25:11,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:11,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:25:11,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:11,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:11,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:25:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:11,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:11,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:11,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:11,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:25:11,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:11,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:11,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:11,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:11,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:11,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592646745] [2020-09-21 12:25:11,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:11,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 12:25:11,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647840725] [2020-09-21 12:25:11,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:25:11,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:11,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:25:11,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:25:11,323 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-09-21 12:25:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:11,905 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-09-21 12:25:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:25:11,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-21 12:25:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:11,912 INFO L225 Difference]: With dead ends: 64 [2020-09-21 12:25:11,913 INFO L226 Difference]: Without dead ends: 62 [2020-09-21 12:25:11,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:25:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-21 12:25:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-09-21 12:25:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 12:25:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-09-21 12:25:11,934 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 24 [2020-09-21 12:25:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:11,935 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-09-21 12:25:11,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:25:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-09-21 12:25:11,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 12:25:11,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:11,937 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:25:11,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:25:11,937 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1086413545, now seen corresponding path program 1 times [2020-09-21 12:25:11,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:11,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107945439] [2020-09-21 12:25:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:11,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:12,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:12,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:12,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 12:25:12,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:12,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:25:12,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:12,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:25:12,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-21 12:25:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:25:12,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:13,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:13,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:13,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:13,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:13,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:13,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:25:13,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:13,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:13,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:13,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:13,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:13,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:25:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:13,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:13,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:13,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:25:13,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:13,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:25:13,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:13,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:13,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:13,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:13,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:25:13,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:25:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:13,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:13,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:13,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:13,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:13,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:25:13,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:13,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:13,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:13,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:13,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:13,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:25:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:13,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:13,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:13,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:25:13,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:13,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:25:13,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:13,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:13,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:13,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:25:13,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:13,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107945439] [2020-09-21 12:25:13,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:25:13,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:25:13,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752417270] [2020-09-21 12:25:13,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:25:13,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:13,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:25:13,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:25:13,222 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 10 states. [2020-09-21 12:25:13,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:13,921 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-09-21 12:25:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 12:25:13,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-09-21 12:25:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:13,924 INFO L225 Difference]: With dead ends: 68 [2020-09-21 12:25:13,924 INFO L226 Difference]: Without dead ends: 66 [2020-09-21 12:25:13,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-21 12:25:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-21 12:25:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2020-09-21 12:25:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 12:25:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-09-21 12:25:13,948 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2020-09-21 12:25:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:13,948 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-09-21 12:25:13,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:25:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-09-21 12:25:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 12:25:13,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:13,952 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:25:13,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:25:13,953 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 601964552, now seen corresponding path program 1 times [2020-09-21 12:25:13,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:13,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946290308] [2020-09-21 12:25:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:14,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:14,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:14,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:14,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 12:25:14,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:14,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:25:14,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:14,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:25:14,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:14,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-21 12:25:14,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:15,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:15,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:15,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:15,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:15,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:25:15,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:15,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:15,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:25:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:15,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:15,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:15,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:25:15,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:15,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:25:15,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:15,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:15,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:15,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:15,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:15,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:25:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:15,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:15,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:15,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:15,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:15,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:25:15,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:15,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:25:15,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:15,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:25:15,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:15,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:25:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:15,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:15,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:15,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:25:15,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:15,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 12:25:15,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:15,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:15,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:15,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:25:15,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:15,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:25:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:15,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:15,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:15,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:25:15,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:15,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:25:15,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:15,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:15,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:15,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:25:15,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:15,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 12:25:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:15,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:15,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:15,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:25:15,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:15,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 12:25:15,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:15,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:15,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:15,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:25:15,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 12:25:15,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946290308] [2020-09-21 12:25:15,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:25:15,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:25:15,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959714350] [2020-09-21 12:25:15,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:25:15,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:15,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:25:15,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:25:15,269 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 12 states. [2020-09-21 12:25:15,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:15,682 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-09-21 12:25:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:25:15,683 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-09-21 12:25:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:15,683 INFO L225 Difference]: With dead ends: 43 [2020-09-21 12:25:15,683 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:25:15,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-09-21 12:25:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:25:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:25:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:25:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:25:15,685 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2020-09-21 12:25:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:15,686 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:25:15,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:25:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:25:15,686 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:25:15,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:25:15,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:25:16,392 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-09-21 12:25:16,509 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-09-21 12:25:16,513 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:25:16,514 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:25:16,514 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:25:16,514 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:25:16,514 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:25:16,514 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:25:16,514 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:25:16,515 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 5 7) the Hoare annotation is: true [2020-09-21 12:25:16,515 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-09-21 12:25:16,515 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2020-09-21 12:25:16,515 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2020-09-21 12:25:16,515 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 39 48) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:25:16,515 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 39 48) no Hoare annotation was computed. [2020-09-21 12:25:16,515 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= (select |#memory_int| |main_#t~malloc10.base|) .cse0))) [2020-09-21 12:25:16,516 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-09-21 12:25:16,516 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-09-21 12:25:16,516 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:25:16,516 INFO L268 CegarLoopResult]: For program point L43-1(line 43) no Hoare annotation was computed. [2020-09-21 12:25:16,516 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-09-21 12:25:16,516 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 39 48) no Hoare annotation was computed. [2020-09-21 12:25:16,516 INFO L268 CegarLoopResult]: For program point L34-1(line 34) no Hoare annotation was computed. [2020-09-21 12:25:16,516 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 14 37) the Hoare annotation is: true [2020-09-21 12:25:16,517 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (let ((.cse2 ((as const (Array Int Int)) 0)) (.cse1 (= |check_#in~x| 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not .cse1)) (or .cse0 (not (<= 1 |check_#in~x|))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse2)) (and (= (select |#memory_int| check_~a.base) .cse2) (let ((.cse3 (<= (+ check_~y 1) check_~n))) (or (and .cse3 (<= 1 check_~x)) (and .cse1 .cse3 (= check_~x 0))))))) [2020-09-21 12:25:16,517 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-09-21 12:25:16,517 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-21 12:25:16,517 INFO L268 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-09-21 12:25:16,519 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 24) the Hoare annotation is: (let ((.cse2 ((as const (Array Int Int)) 0)) (.cse1 (= |check_#in~x| 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not .cse1)) (or .cse0 (not (<= 1 |check_#in~x|))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse2)) (and (= (select |#memory_int| check_~a.base) .cse2) (let ((.cse3 (<= (+ check_~y 1) check_~n))) (or (and .cse3 (<= 1 check_~x)) (and .cse1 .cse3 (= check_~x 0))))))) [2020-09-21 12:25:16,519 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 14 37) no Hoare annotation was computed. [2020-09-21 12:25:16,519 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse3 ((as const (Array Int Int)) 0)) (.cse1 (= |check_#in~x| 0)) (.cse2 (<= 1 |check_#in~x|))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not .cse1)) (or .cse0 (not .cse2)))) (not (= (select |#memory_int| |check_#in~a.base|) .cse3)) (and (= (select |#memory_int| check_~a.base) .cse3) (let ((.cse4 (<= (+ check_~y 1) check_~n))) (or (and .cse1 .cse4 (= check_~x 0)) (and .cse4 .cse2 (<= 1 check_~x))))))) [2020-09-21 12:25:16,519 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-09-21 12:25:16,519 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-21 12:25:16,520 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 14 37) no Hoare annotation was computed. [2020-09-21 12:25:16,520 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (let ((.cse2 ((as const (Array Int Int)) 0)) (.cse1 (= |check_#in~x| 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not .cse1)) (or .cse0 (not (<= 1 |check_#in~x|))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse2)) (and (= check_~ai~0 check_~ax~0) (= (select |#memory_int| check_~a.base) .cse2) (let ((.cse3 (<= (+ check_~y 1) check_~n))) (or (and .cse3 (<= 1 check_~x)) (and .cse1 .cse3 (= check_~x 0))))))) [2020-09-21 12:25:16,520 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 8 10) the Hoare annotation is: true [2020-09-21 12:25:16,520 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 8 10) no Hoare annotation was computed. [2020-09-21 12:25:16,520 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-09-21 12:25:16,520 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-09-21 12:25:16,520 INFO L268 CegarLoopResult]: For program point L9-3(lines 8 10) no Hoare annotation was computed. [2020-09-21 12:25:16,520 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-09-21 12:25:16,521 INFO L264 CegarLoopResult]: At program point #Ultimate.meminitENTRY(line -1) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-09-21 12:25:16,521 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:25:16,521 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:25:16,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:25:16 BoogieIcfgContainer [2020-09-21 12:25:16,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:25:16,536 INFO L168 Benchmark]: Toolchain (without parser) took 7870.35 ms. Allocated memory was 139.5 MB in the beginning and 280.0 MB in the end (delta: 140.5 MB). Free memory was 102.7 MB in the beginning and 105.2 MB in the end (delta: -2.6 MB). Peak memory consumption was 138.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:16,538 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-21 12:25:16,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.13 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:16,542 INFO L168 Benchmark]: Boogie Preprocessor took 127.92 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 180.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:16,544 INFO L168 Benchmark]: RCFGBuilder took 435.87 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 161.8 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:16,546 INFO L168 Benchmark]: TraceAbstraction took 6951.49 ms. Allocated memory was 202.4 MB in the beginning and 280.0 MB in the end (delta: 77.6 MB). Free memory was 161.1 MB in the beginning and 105.2 MB in the end (delta: 55.9 MB). Peak memory consumption was 133.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:16,549 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 346.13 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.92 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 180.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 435.87 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 161.8 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6951.49 ms. Allocated memory was 202.4 MB in the beginning and 280.0 MB in the end (delta: 77.6 MB). Free memory was 161.1 MB in the beginning and 105.2 MB in the end (delta: 55.9 MB). Peak memory consumption was 133.5 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.0s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 130 SDtfs, 288 SDslu, 185 SDs, 0 SdLazy, 793 SolverSat, 240 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=2, 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, 4 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 36 PreInvPairs, 44 NumberOfFragments, 294 HoareAnnotationTreeSize, 36 FomulaSimplifications, 736 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 15 FomulaSimplificationsInter, 337 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 11442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 8/13 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...