/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test22-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:32:50,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:32:50,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:32:50,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:32:50,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:32:50,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:32:50,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:32:50,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:32:50,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:32:50,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:32:50,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:32:50,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:32:50,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:32:50,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:32:50,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:32:50,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:32:50,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:32:50,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:32:50,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:32:50,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:32:50,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:32:50,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:32:50,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:32:50,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:32:50,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 23:32:50,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:32:50,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:32:50,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:32:50,308 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 [2020-08-18 23:32:50,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:32:50,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:32:50,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:32:50,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:32:50,353 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:32:50,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:32:50,354 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:32:50,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:32:50,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:32:50,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:32:50,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:32:50,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:32:50,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:32:50,356 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:32:50,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:32:50,357 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:32:50,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:32:50,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:32:50,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:32:50,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:32:50,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:32:50,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:32:50,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:32:50,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:32:50,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:32:50,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:32:50,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:32:50,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:32:50,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:32:50,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:32:50,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:32:50,686 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:32:50,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:32:50,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:32:50,694 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:32:50,694 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-2.c [2020-08-18 23:32:50,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dcf09e37a/e41429c0a96244c280798ba61be47c16/FLAG080d8b814 [2020-08-18 23:32:51,185 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:32:51,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test22-2.c [2020-08-18 23:32:51,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dcf09e37a/e41429c0a96244c280798ba61be47c16/FLAG080d8b814 [2020-08-18 23:32:51,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dcf09e37a/e41429c0a96244c280798ba61be47c16 [2020-08-18 23:32:51,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:32:51,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:32:51,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:51,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:32:51,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:32:51,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:51" (1/1) ... [2020-08-18 23:32:51,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ccc9065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51, skipping insertion in model container [2020-08-18 23:32:51,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:51" (1/1) ... [2020-08-18 23:32:51,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:32:51,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:32:51,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:51,834 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:32:51,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:51,869 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:32:51,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51 WrapperNode [2020-08-18 23:32:51,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:51,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:32:51,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:32:51,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:32:51,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51" (1/1) ... [2020-08-18 23:32:51,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51" (1/1) ... [2020-08-18 23:32:51,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51" (1/1) ... [2020-08-18 23:32:51,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51" (1/1) ... [2020-08-18 23:32:51,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51" (1/1) ... [2020-08-18 23:32:51,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51" (1/1) ... [2020-08-18 23:32:52,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51" (1/1) ... [2020-08-18 23:32:52,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:32:52,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:32:52,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:32:52,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:32:52,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51" (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 [2020-08-18 23:32:52,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:32:52,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:32:52,064 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-18 23:32:52,065 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-08-18 23:32:52,065 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-18 23:32:52,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:32:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:32:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:32:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 23:32:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 23:32:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 23:32:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-08-18 23:32:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 23:32:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 23:32:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:32:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:32:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 23:32:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 23:32:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:32:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 23:32:52,344 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:32:52,344 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:32:52,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:52 BoogieIcfgContainer [2020-08-18 23:32:52,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:32:52,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:32:52,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:32:52,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:32:52,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:32:51" (1/3) ... [2020-08-18 23:32:52,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb8c63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:52, skipping insertion in model container [2020-08-18 23:32:52,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:51" (2/3) ... [2020-08-18 23:32:52,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb8c63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:52, skipping insertion in model container [2020-08-18 23:32:52,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:52" (3/3) ... [2020-08-18 23:32:52,359 INFO L109 eAbstractionObserver]: Analyzing ICFG test22-2.c [2020-08-18 23:32:52,373 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:32:52,382 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:32:52,402 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:32:52,429 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:32:52,429 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:32:52,429 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:32:52,429 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:32:52,429 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:32:52,430 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:32:52,430 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:32:52,430 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:32:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-18 23:32:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 23:32:52,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:52,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:52,460 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:52,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1345538594, now seen corresponding path program 1 times [2020-08-18 23:32:52,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:52,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513733863] [2020-08-18 23:32:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:52,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:52,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:32:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:52,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:32:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:52,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 23:32:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:52,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 23:32:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:52,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 23:32:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 23:32:52,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513733863] [2020-08-18 23:32:52,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:52,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:32:52,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245068163] [2020-08-18 23:32:52,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:32:52,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:52,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:32:52,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:32:52,861 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-08-18 23:32:53,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:53,134 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-08-18 23:32:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:32:53,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-08-18 23:32:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:53,147 INFO L225 Difference]: With dead ends: 49 [2020-08-18 23:32:53,147 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 23:32:53,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:32:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 23:32:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 23:32:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 23:32:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-18 23:32:53,201 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2020-08-18 23:32:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:53,204 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-18 23:32:53,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:32:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-18 23:32:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 23:32:53,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:53,207 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:53,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:32:53,208 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:53,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:53,208 INFO L82 PathProgramCache]: Analyzing trace with hash -213153012, now seen corresponding path program 1 times [2020-08-18 23:32:53,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:53,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445233845] [2020-08-18 23:32:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:53,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:53,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:32:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:53,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:32:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:53,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 23:32:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:53,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 23:32:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:53,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 23:32:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 23:32:53,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445233845] [2020-08-18 23:32:53,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:32:53,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 23:32:53,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435735468] [2020-08-18 23:32:53,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 23:32:53,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 23:32:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:32:53,547 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 12 states. [2020-08-18 23:32:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:54,307 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-08-18 23:32:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 23:32:54,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-08-18 23:32:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:54,312 INFO L225 Difference]: With dead ends: 68 [2020-08-18 23:32:54,312 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 23:32:54,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:32:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 23:32:54,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2020-08-18 23:32:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 23:32:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-08-18 23:32:54,331 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 38 [2020-08-18 23:32:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:54,332 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-08-18 23:32:54,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 23:32:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-08-18 23:32:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 23:32:54,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:54,334 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-08-18 23:32:54,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:32:54,335 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1234221366, now seen corresponding path program 1 times [2020-08-18 23:32:54,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:54,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043806694] [2020-08-18 23:32:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:32:54,408 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:32:54,408 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:32:54,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:32:54,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:32:54 BoogieIcfgContainer [2020-08-18 23:32:54,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:32:54,434 INFO L168 Benchmark]: Toolchain (without parser) took 2821.68 ms. Allocated memory was 141.6 MB in the beginning and 244.3 MB in the end (delta: 102.8 MB). Free memory was 103.6 MB in the beginning and 214.1 MB in the end (delta: -110.5 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:54,435 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 23:32:54,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.03 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 92.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:54,437 INFO L168 Benchmark]: Boogie Preprocessor took 133.12 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 182.3 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:54,438 INFO L168 Benchmark]: RCFGBuilder took 345.81 ms. Allocated memory is still 205.0 MB. Free memory was 182.3 MB in the beginning and 163.6 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:54,439 INFO L168 Benchmark]: TraceAbstraction took 2079.81 ms. Allocated memory was 205.0 MB in the beginning and 244.3 MB in the end (delta: 39.3 MB). Free memory was 162.9 MB in the beginning and 214.1 MB in the end (delta: -51.1 MB). Peak memory consumption was 106.5 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:54,443 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.03 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 92.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.12 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 182.3 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.81 ms. Allocated memory is still 205.0 MB. Free memory was 182.3 MB in the beginning and 163.6 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2079.81 ms. Allocated memory was 205.0 MB in the beginning and 244.3 MB in the end (delta: 39.3 MB). Free memory was 162.9 MB in the beginning and 214.1 MB in the end (delta: -51.1 MB). Peak memory consumption was 106.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 48]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] struct dummy d1, d2; [L32] CALL init() [L13] d1.a = __VERIFIER_nondet_int() [L14] d1.b = __VERIFIER_nondet_int() [L16] d2.a = __VERIFIER_nondet_int() [L17] d2.b = __VERIFIER_nondet_int() [L32] RET init() [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L34] int i = __VERIFIER_nondet_int(); [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L35] EXPR (*pd2).a [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L35] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L36] int *pa = &pd1->a; [L37] EXPR pd3->a [L37] i = pd3->a - 10 [L38] EXPR \read(*pa) [L38] COND FALSE !(i < *pa) [L41] CALL, EXPR check(pd2, i) [L27] EXPR s1->a [L27] return s1->a == i; [L41] RET, EXPR check(pd2, i) [L41] COND TRUE !check(pd2, i) [L48] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 93 SDslu, 51 SDs, 0 SdLazy, 392 SolverSat, 53 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 17 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 7893 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 21/24 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...