/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:06:43,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:06:43,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:06:43,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:06:43,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:06:43,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:06:43,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:06:43,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:06:43,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:06:43,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:06:43,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:06:43,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:06:43,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:06:43,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:06:43,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:06:43,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:06:43,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:06:43,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:06:43,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:06:43,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:06:43,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:06:43,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:06:43,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:06:43,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:06:43,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:06:43,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:06:43,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:06:43,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:06:43,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:06:43,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-25 02:06:43,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:06:43,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:06:43,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:06:43,751 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 02:06:43,801 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:06:43,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:06:43,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:06:43,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:06:43,804 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:06:43,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:06:43,805 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:06:43,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:06:43,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:06:43,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:06:43,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:06:43,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:06:43,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:06:43,808 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:06:43,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:06:43,808 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:06:43,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:06:43,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:06:43,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:06:43,809 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:06:43,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:06:43,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:06:43,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:06:43,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:06:43,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:06:43,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:06:43,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:06:43,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:06:43,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:06:43,811 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:06:44,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:06:44,302 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:06:44,308 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:06:44,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:06:44,311 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:06:44,312 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-09-25 02:06:44,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c61b98031/bfaa6276c0d145b8b6224bf0bbb3585e/FLAGbd06e4d9a [2020-09-25 02:06:44,954 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:06:44,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test08.c [2020-09-25 02:06:44,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c61b98031/bfaa6276c0d145b8b6224bf0bbb3585e/FLAGbd06e4d9a [2020-09-25 02:06:45,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c61b98031/bfaa6276c0d145b8b6224bf0bbb3585e [2020-09-25 02:06:45,296 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:06:45,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:06:45,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:06:45,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:06:45,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:06:45,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:06:45" (1/1) ... [2020-09-25 02:06:45,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a2f81e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45, skipping insertion in model container [2020-09-25 02:06:45,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:06:45" (1/1) ... [2020-09-25 02:06:45,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:06:45,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:06:45,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:06:45,585 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:06:45,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:06:45,619 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:06:45,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45 WrapperNode [2020-09-25 02:06:45,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:06:45,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:06:45,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:06:45,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:06:45,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45" (1/1) ... [2020-09-25 02:06:45,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45" (1/1) ... [2020-09-25 02:06:45,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45" (1/1) ... [2020-09-25 02:06:45,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45" (1/1) ... [2020-09-25 02:06:45,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45" (1/1) ... [2020-09-25 02:06:45,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45" (1/1) ... [2020-09-25 02:06:45,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45" (1/1) ... [2020-09-25 02:06:45,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:06:45,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:06:45,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:06:45,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:06:45,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45" (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 02:06:45,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:06:45,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:06:45,818 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-25 02:06:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:06:45,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:06:45,819 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-25 02:06:45,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:06:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:06:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:06:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:06:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:06:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-25 02:06:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:06:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:06:46,098 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:06:46,099 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 02:06:46,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:06:46 BoogieIcfgContainer [2020-09-25 02:06:46,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:06:46,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:06:46,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:06:46,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:06:46,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:06:45" (1/3) ... [2020-09-25 02:06:46,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a30607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:06:46, skipping insertion in model container [2020-09-25 02:06:46,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:06:45" (2/3) ... [2020-09-25 02:06:46,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a30607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:06:46, skipping insertion in model container [2020-09-25 02:06:46,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:06:46" (3/3) ... [2020-09-25 02:06:46,116 INFO L109 eAbstractionObserver]: Analyzing ICFG test08.c [2020-09-25 02:06:46,131 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:06:46,142 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:06:46,171 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:06:46,216 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:06:46,217 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:06:46,217 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:06:46,217 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:06:46,217 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:06:46,217 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:06:46,217 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:06:46,217 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:06:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-25 02:06:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 02:06:46,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:06:46,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:06:46,250 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:06:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:06:46,256 INFO L82 PathProgramCache]: Analyzing trace with hash 56438835, now seen corresponding path program 1 times [2020-09-25 02:06:46,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:06:46,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314232102] [2020-09-25 02:06:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:06:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:06:46,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:06:46,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:06:47,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:06:48,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:06:48,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 02:06:48,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:06:48,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2065 [2020-09-25 02:06:48,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:06:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:06:48,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 02:06:48,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:06:48,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 02:06:48,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:06:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:06:48,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:06:48,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:06:48,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:06:48,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:06:48,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 02:06:48,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:06:48,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:06:48,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:06:48,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:06:48,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:06:48,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-25 02:06:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:06:48,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:06:48,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:06:48,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:06:48,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:06:48,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 02:06:48,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:06:48,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:06:48,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:06:48,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 02:06:48,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:06:48,949 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 02:06:48,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314232102] [2020-09-25 02:06:48,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:06:48,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 02:06:48,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482659643] [2020-09-25 02:06:48,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:06:48,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:06:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:06:48,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:06:48,997 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 8 states. [2020-09-25 02:06:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:06:49,571 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-25 02:06:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 02:06:49,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-09-25 02:06:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:06:49,591 INFO L225 Difference]: With dead ends: 71 [2020-09-25 02:06:49,591 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 02:06:49,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:06:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 02:06:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-25 02:06:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 02:06:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2020-09-25 02:06:49,664 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2020-09-25 02:06:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:06:49,665 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2020-09-25 02:06:49,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:06:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2020-09-25 02:06:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 02:06:49,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:06:49,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:06:49,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:06:49,669 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:06:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:06:49,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1088655632, now seen corresponding path program 1 times [2020-09-25 02:06:49,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:06:49,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013233521] [2020-09-25 02:06:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:06:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 02:06:49,696 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 02:06:49,696 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:06:49,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:06:49,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:06:49 BoogieIcfgContainer [2020-09-25 02:06:49,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:06:49,736 INFO L168 Benchmark]: Toolchain (without parser) took 4437.14 ms. Allocated memory was 140.5 MB in the beginning and 246.4 MB in the end (delta: 105.9 MB). Free memory was 102.5 MB in the beginning and 194.0 MB in the end (delta: -91.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:06:49,738 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-25 02:06:49,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.77 ms. Allocated memory is still 140.5 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-25 02:06:49,740 INFO L168 Benchmark]: Boogie Preprocessor took 116.74 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 181.5 MB in the end (delta: -90.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:06:49,741 INFO L168 Benchmark]: RCFGBuilder took 368.65 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 164.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-09-25 02:06:49,742 INFO L168 Benchmark]: TraceAbstraction took 3625.00 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 164.2 MB in the beginning and 194.0 MB in the end (delta: -29.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-25 02:06:49,746 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 140.5 MB. Free memory was 120.8 MB in the beginning and 120.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.77 ms. Allocated memory is still 140.5 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.74 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 181.5 MB in the end (delta: -90.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.65 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 164.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3625.00 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 164.2 MB in the beginning and 194.0 MB in the end (delta: -29.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 36]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int a, b; [L5] int *p1, *p2; [L19] p1 = &a [L20] p2 = &b [L22] b = 1 [L23] a = 5 [L25] EXPR \read(a) [L25] a-- [L27] CALL, EXPR f() [L8] EXPR \read(*p1) [L8] EXPR \read(*p2) [L8] EXPR \read(a) [L8] int v = *p1 + *p2 - a; [L9] COND TRUE v == 1 [L10] p1 = p2 [L11] return v; [L27] RET, EXPR f() [L27] a = f() [L29] EXPR \read(a) [L29] COND TRUE a && p1 == p2 [L36] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 35 SDslu, 130 SDs, 0 SdLazy, 137 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 4160 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 incorrect! Received shutdown request...