/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=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:34:40,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:34:40,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:34:40,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:34:40,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:34:40,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:34:40,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:34:40,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:34:40,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:34:40,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:34:40,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:34:40,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:34:40,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:34:40,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:34:40,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:34:40,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:34:40,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:34:40,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:34:40,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:34:40,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:34:40,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:34:40,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:34:40,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:34:40,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:34:40,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:34:40,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:34:40,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:34:40,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:34:40,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:34:40,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:34:40,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:34:40,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:34:40,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:34:40,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:34:40,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:34:40,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:34:40,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:34:40,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:34:40,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:34:40,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:34:40,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:34:40,153 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 04:34:40,178 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:34:40,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:34:40,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:34:40,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:34:40,180 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:34:40,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:34:40,180 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:34:40,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:34:40,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:34:40,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:34:40,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:34:40,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:34:40,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:34:40,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:34:40,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:34:40,182 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:34:40,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:34:40,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:34:40,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:34:40,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:34:40,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:34:40,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:34:40,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:34:40,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:34:40,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:34:40,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:34:40,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:34:40,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:34:40,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:34:40,185 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 04:34:40,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:34:40,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:34:40,738 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:34:40,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:34:40,742 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:34:40,743 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 04:34:40,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e63aa306f/79729fe4e97e4be2b5ef74f312eb4e1c/FLAG9d6793ce2 [2020-09-25 04:34:41,379 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:34:41,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 04:34:41,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e63aa306f/79729fe4e97e4be2b5ef74f312eb4e1c/FLAG9d6793ce2 [2020-09-25 04:34:41,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e63aa306f/79729fe4e97e4be2b5ef74f312eb4e1c [2020-09-25 04:34:41,720 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:34:41,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:34:41,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:34:41,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:34:41,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:34:41,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:34:41" (1/1) ... [2020-09-25 04:34:41,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:41, skipping insertion in model container [2020-09-25 04:34:41,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:34:41" (1/1) ... [2020-09-25 04:34:41,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:34:41,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:34:42,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:34:42,026 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:34:42,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:34:42,068 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:34:42,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42 WrapperNode [2020-09-25 04:34:42,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:34:42,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:34:42,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:34:42,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:34:42,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42" (1/1) ... [2020-09-25 04:34:42,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42" (1/1) ... [2020-09-25 04:34:42,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42" (1/1) ... [2020-09-25 04:34:42,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42" (1/1) ... [2020-09-25 04:34:42,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42" (1/1) ... [2020-09-25 04:34:42,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42" (1/1) ... [2020-09-25 04:34:42,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42" (1/1) ... [2020-09-25 04:34:42,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:34:42,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:34:42,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:34:42,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:34:42,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42" (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 04:34:42,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:34:42,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:34:42,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 04:34:42,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 04:34:42,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:34:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:34:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 04:34:42,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 04:34:42,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 04:34:42,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:34:42,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:34:42,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:34:42,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:34:42,520 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:34:42,521 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 04:34:42,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:34:42 BoogieIcfgContainer [2020-09-25 04:34:42,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:34:42,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:34:42,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:34:42,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:34:42,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:34:41" (1/3) ... [2020-09-25 04:34:42,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208d27ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:34:42, skipping insertion in model container [2020-09-25 04:34:42,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:42" (2/3) ... [2020-09-25 04:34:42,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208d27ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:34:42, skipping insertion in model container [2020-09-25 04:34:42,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:34:42" (3/3) ... [2020-09-25 04:34:42,537 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-25 04:34:42,550 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:34:42,562 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:34:42,587 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:34:42,629 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:34:42,629 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:34:42,629 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:34:42,630 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:34:42,630 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:34:42,630 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:34:42,630 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:34:42,630 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:34:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-25 04:34:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 04:34:42,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:42,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:42,672 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:42,681 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-09-25 04:34:42,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:42,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343797971] [2020-09-25 04:34:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:42,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:42,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:42,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 04:34:42,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:34:42,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-25 04:34:42,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:42,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 04:34:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:42,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 04:34:43,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:43,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:43,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:43,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:43,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:43,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:34:43,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:43,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:43,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:43,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:43,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:43,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:43,020 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 04:34:43,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343797971] [2020-09-25 04:34:43,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:43,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 04:34:43,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733799644] [2020-09-25 04:34:43,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 04:34:43,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 04:34:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 04:34:43,051 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-09-25 04:34:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:43,079 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-09-25 04:34:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 04:34:43,081 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-09-25 04:34:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:43,093 INFO L225 Difference]: With dead ends: 61 [2020-09-25 04:34:43,094 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 04:34:43,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 04:34:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 04:34:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-25 04:34:43,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-25 04:34:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-25 04:34:43,147 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-09-25 04:34:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:43,148 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-25 04:34:43,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 04:34:43,149 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-25 04:34:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 04:34:43,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:43,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:43,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:34:43,151 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:43,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:43,152 INFO L82 PathProgramCache]: Analyzing trace with hash 528039752, now seen corresponding path program 1 times [2020-09-25 04:34:43,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:43,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123690682] [2020-09-25 04:34:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:43,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:43,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:43,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:43,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 04:34:43,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:34:43,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-09-25 04:34:43,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:43,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:43,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 04:34:43,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 04:34:43,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 04:34:43,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:43,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:43,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:43,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:43,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:43,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:43,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:34:43,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:43,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:43,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:43,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:43,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 04:34:43,422 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 04:34:43,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123690682] [2020-09-25 04:34:43,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:43,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:34:43,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306625586] [2020-09-25 04:34:43,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:34:43,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:43,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:34:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:34:43,432 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-09-25 04:34:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:43,496 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-09-25 04:34:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 04:34:43,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-09-25 04:34:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:43,498 INFO L225 Difference]: With dead ends: 39 [2020-09-25 04:34:43,498 INFO L226 Difference]: Without dead ends: 32 [2020-09-25 04:34:43,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:34:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-25 04:34:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-09-25 04:34:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 04:34:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 04:34:43,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-09-25 04:34:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:43,509 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 04:34:43,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:34:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 04:34:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 04:34:43,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:43,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:43,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:34:43,513 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-09-25 04:34:43,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:43,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078123585] [2020-09-25 04:34:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:43,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:43,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:43,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 04:34:43,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:43,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-09-25 04:34:43,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:43,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:34:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:34:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 04:34:43,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:43,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:43,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:43,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:43,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:43,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:34:43,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:43,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:43,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:43,800 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 04:34:43,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078123585] [2020-09-25 04:34:43,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:43,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 04:34:43,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311486084] [2020-09-25 04:34:43,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 04:34:43,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:43,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 04:34:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:34:43,803 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-09-25 04:34:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:43,908 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 04:34:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 04:34:43,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-25 04:34:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:43,910 INFO L225 Difference]: With dead ends: 42 [2020-09-25 04:34:43,910 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 04:34:43,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 04:34:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 04:34:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-25 04:34:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 04:34:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 04:34:43,923 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-09-25 04:34:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:43,924 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 04:34:43,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 04:34:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 04:34:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 04:34:43,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:43,925 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:43,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:34:43,926 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-09-25 04:34:43,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:43,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362276999] [2020-09-25 04:34:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:43,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:44,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:44,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 04:34:44,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:34:44,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-09-25 04:34:44,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:44,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:44,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:34:44,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:34:44,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 04:34:44,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:44,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:44,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:44,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:44,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:44,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:44,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:34:44,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:44,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:44,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:44,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-25 04:34:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:44,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:44,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:44,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:44,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:34:44,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:34:44,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 04:34:44,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:44,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:34:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:34:44,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:34:44,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362276999] [2020-09-25 04:34:44,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:44,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 04:34:44,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366484848] [2020-09-25 04:34:44,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 04:34:44,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:44,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 04:34:44,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 04:34:44,602 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-09-25 04:34:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:44,785 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-25 04:34:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 04:34:44,786 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-25 04:34:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:44,787 INFO L225 Difference]: With dead ends: 46 [2020-09-25 04:34:44,787 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 04:34:44,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:34:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 04:34:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-09-25 04:34:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 04:34:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 04:34:44,797 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 28 [2020-09-25 04:34:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:44,797 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 04:34:44,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 04:34:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 04:34:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 04:34:44,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:44,799 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:44,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:34:44,799 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:44,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-09-25 04:34:44,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:44,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834806720] [2020-09-25 04:34:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 04:34:44,813 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 04:34:44,814 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 04:34:44,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:34:44,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:34:44 BoogieIcfgContainer [2020-09-25 04:34:44,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 04:34:44,854 INFO L168 Benchmark]: Toolchain (without parser) took 3129.55 ms. Allocated memory was 145.2 MB in the beginning and 232.3 MB in the end (delta: 87.0 MB). Free memory was 101.6 MB in the beginning and 137.3 MB in the end (delta: -35.7 MB). Peak memory consumption was 51.4 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:44,856 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 04:34:44,859 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.91 ms. Allocated memory is still 145.2 MB. Free memory was 101.0 MB in the beginning and 91.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:44,860 INFO L168 Benchmark]: Boogie Preprocessor took 124.50 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 91.1 MB in the beginning and 180.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:44,867 INFO L168 Benchmark]: RCFGBuilder took 332.48 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 165.8 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:44,868 INFO L168 Benchmark]: TraceAbstraction took 2321.49 ms. Allocated memory was 201.3 MB in the beginning and 232.3 MB in the end (delta: 30.9 MB). Free memory was 165.2 MB in the beginning and 137.3 MB in the end (delta: 27.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:44,879 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.91 ms. Allocated memory is still 145.2 MB. Free memory was 101.0 MB in the beginning and 91.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.50 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 91.1 MB in the beginning and 180.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 332.48 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 165.8 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2321.49 ms. Allocated memory was 201.3 MB in the beginning and 232.3 MB in the end (delta: 30.9 MB). Free memory was 165.2 MB in the beginning and 137.3 MB in the end (delta: 27.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i