/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:23:33,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:23:33,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:23:33,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:23:33,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:23:33,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:23:33,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:23:33,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:23:33,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:23:33,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:23:33,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:23:33,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:23:33,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:23:33,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:23:33,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:23:33,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:23:33,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:23:33,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:23:33,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:23:33,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:23:33,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:23:33,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:23:33,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:23:33,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:23:33,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:23:33,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:23:33,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:23:33,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:23:33,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:23:33,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 19:23:33,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:23:33,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:23:33,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:23:33,527 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 [2020-09-24 19:23:33,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:23:33,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:23:33,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:23:33,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:23:33,557 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:23:33,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:23:33,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:23:33,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:23:33,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:23:33,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:23:33,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:23:33,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:23:33,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:23:33,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:23:33,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:23:33,559 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:23:33,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:23:33,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:23:33,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:23:33,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:23:33,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:23:33,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:23:33,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:23:33,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:23:33,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:23:33,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:23:33,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:23:33,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:23:33,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:23:33,564 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:23:34,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:23:34,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:23:34,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:23:34,101 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:23:34,103 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:23:34,104 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-09-24 19:23:34,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb1433244/c3f554db37ea4dbea6e3f8c4224f8b9d/FLAG9a794d64d [2020-09-24 19:23:34,705 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:23:34,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test08.c [2020-09-24 19:23:34,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb1433244/c3f554db37ea4dbea6e3f8c4224f8b9d/FLAG9a794d64d [2020-09-24 19:23:35,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb1433244/c3f554db37ea4dbea6e3f8c4224f8b9d [2020-09-24 19:23:35,087 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:23:35,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:23:35,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:23:35,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:23:35,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:23:35,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:23:35" (1/1) ... [2020-09-24 19:23:35,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62030c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35, skipping insertion in model container [2020-09-24 19:23:35,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:23:35" (1/1) ... [2020-09-24 19:23:35,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:23:35,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:23:35,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:23:35,419 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:23:35,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:23:35,452 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:23:35,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35 WrapperNode [2020-09-24 19:23:35,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:23:35,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:23:35,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:23:35,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:23:35,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35" (1/1) ... [2020-09-24 19:23:35,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35" (1/1) ... [2020-09-24 19:23:35,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35" (1/1) ... [2020-09-24 19:23:35,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35" (1/1) ... [2020-09-24 19:23:35,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35" (1/1) ... [2020-09-24 19:23:35,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35" (1/1) ... [2020-09-24 19:23:35,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35" (1/1) ... [2020-09-24 19:23:35,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:23:35,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:23:35,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:23:35,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:23:35,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35" (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 [2020-09-24 19:23:35,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:23:35,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:23:35,663 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-24 19:23:35,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:23:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:23:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-24 19:23:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 19:23:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:23:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 19:23:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:23:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 19:23:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 19:23:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:23:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:23:35,985 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:23:35,986 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:23:35,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:23:35 BoogieIcfgContainer [2020-09-24 19:23:35,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:23:35,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:23:35,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:23:35,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:23:35,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:23:35" (1/3) ... [2020-09-24 19:23:35,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35074a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:23:35, skipping insertion in model container [2020-09-24 19:23:36,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:23:35" (2/3) ... [2020-09-24 19:23:36,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35074a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:23:36, skipping insertion in model container [2020-09-24 19:23:36,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:23:35" (3/3) ... [2020-09-24 19:23:36,002 INFO L109 eAbstractionObserver]: Analyzing ICFG test08.c [2020-09-24 19:23:36,016 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:23:36,028 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:23:36,053 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:23:36,110 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:23:36,110 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:23:36,111 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:23:36,111 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:23:36,111 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:23:36,111 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:23:36,111 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:23:36,111 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:23:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-24 19:23:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 19:23:36,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:36,149 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] [2020-09-24 19:23:36,149 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:36,156 INFO L82 PathProgramCache]: Analyzing trace with hash 56438835, now seen corresponding path program 1 times [2020-09-24 19:23:36,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:36,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032708542] [2020-09-24 19:23:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:36,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:36,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:37,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:37,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:37,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 19:23:37,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:23:37,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-24 19:23:37,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:37,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:23:37,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 19:23:37,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:23:37,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:23:37,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:37,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:37,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:37,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 19:23:37,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:37,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-24 19:23:37,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:37,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:37,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:37,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:37,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:23:37,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 19:23:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:37,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:37,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:37,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 19:23:37,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:37,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:23:37,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:37,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:23:37,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:37,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 19:23:37,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:37,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032708542] [2020-09-24 19:23:37,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:23:37,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:23:37,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268842417] [2020-09-24 19:23:37,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:23:37,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:37,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:23:37,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:23:37,663 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 8 states. [2020-09-24 19:23:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:38,012 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-24 19:23:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:23:38,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-09-24 19:23:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:38,028 INFO L225 Difference]: With dead ends: 71 [2020-09-24 19:23:38,029 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 19:23:38,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:23:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 19:23:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-24 19:23:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 19:23:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2020-09-24 19:23:38,086 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2020-09-24 19:23:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:38,086 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2020-09-24 19:23:38,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:23:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2020-09-24 19:23:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 19:23:38,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:38,089 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] [2020-09-24 19:23:38,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:23:38,089 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1088655632, now seen corresponding path program 1 times [2020-09-24 19:23:38,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:38,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557372759] [2020-09-24 19:23:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:23:38,115 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:23:38,115 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:23:38,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:23:38,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:23:38 BoogieIcfgContainer [2020-09-24 19:23:38,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:23:38,152 INFO L168 Benchmark]: Toolchain (without parser) took 3060.98 ms. Allocated memory was 140.5 MB in the beginning and 234.9 MB in the end (delta: 94.4 MB). Free memory was 103.9 MB in the beginning and 141.9 MB in the end (delta: -38.1 MB). Peak memory consumption was 56.3 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:38,153 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:23:38,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.56 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:38,155 INFO L168 Benchmark]: Boogie Preprocessor took 115.92 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 93.5 MB in the beginning and 179.9 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:38,156 INFO L168 Benchmark]: RCFGBuilder took 422.43 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 162.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:38,157 INFO L168 Benchmark]: TraceAbstraction took 2154.34 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 162.2 MB in the beginning and 141.9 MB in the end (delta: 20.3 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:38,162 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 358.56 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.92 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 93.5 MB in the beginning and 179.9 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 422.43 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 162.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2154.34 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 162.2 MB in the beginning and 141.9 MB in the end (delta: 20.3 MB). Peak memory consumption was 53.3 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: 2.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, 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, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s 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, 1.2s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 4480 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...