/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ms1f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:58:13,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:58:13,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:58:13,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:58:13,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:58:13,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:58:13,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:58:13,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:58:13,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:58:13,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:58:13,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:58:13,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:58:13,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:58:13,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:58:13,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:58:13,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:58:13,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:58:13,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:58:13,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:58:13,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:58:13,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:58:13,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:58:13,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:58:13,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:58:13,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:58:13,800 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:58:13,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:58:13,800 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:58:13,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:58:13,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:58:13,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:58:13,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:58:13,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:58:13,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:58:13,802 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:58:13,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:58:13,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:58:13,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:58:13,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:58:13,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:58:13,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:58:13,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:58:13,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:58:13,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:58:13,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:58:13,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:58:13,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:58:13,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:58:13,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:58:13,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:58:14,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:58:14,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:58:14,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:58:14,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:58:14,242 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:58:14,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1f.c [2021-02-19 17:58:14,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06fbf73d2/49bca599ef7b4625a0c243641a5bcf08/FLAG5ee737106 [2021-02-19 17:58:15,038 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:58:15,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms1f.c [2021-02-19 17:58:15,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06fbf73d2/49bca599ef7b4625a0c243641a5bcf08/FLAG5ee737106 [2021-02-19 17:58:15,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06fbf73d2/49bca599ef7b4625a0c243641a5bcf08 [2021-02-19 17:58:15,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:58:15,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:58:15,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:58:15,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:58:15,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:58:15,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:58:15" (1/1) ... [2021-02-19 17:58:15,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e545a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15, skipping insertion in model container [2021-02-19 17:58:15,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:58:15" (1/1) ... [2021-02-19 17:58:15,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:58:15,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:58:15,599 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms1f.c[587,600] [2021-02-19 17:58:15,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:58:15,628 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:58:15,642 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms1f.c[587,600] [2021-02-19 17:58:15,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:58:15,668 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:58:15,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15 WrapperNode [2021-02-19 17:58:15,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:58:15,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:58:15,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:58:15,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:58:15,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15" (1/1) ... [2021-02-19 17:58:15,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15" (1/1) ... [2021-02-19 17:58:15,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15" (1/1) ... [2021-02-19 17:58:15,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15" (1/1) ... [2021-02-19 17:58:15,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15" (1/1) ... [2021-02-19 17:58:15,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15" (1/1) ... [2021-02-19 17:58:15,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15" (1/1) ... [2021-02-19 17:58:15,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:58:15,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:58:15,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:58:15,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:58:15,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-19 17:58:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:58:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:58:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:58:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-19 17:58:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-19 17:58:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:58:15,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-19 17:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-19 17:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-19 17:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-19 17:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:58:16,307 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:58:16,312 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-19 17:58:16,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:58:16 BoogieIcfgContainer [2021-02-19 17:58:16,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:58:16,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:58:16,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:58:16,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:58:16,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:58:15" (1/3) ... [2021-02-19 17:58:16,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff5fcfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:58:16, skipping insertion in model container [2021-02-19 17:58:16,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:15" (2/3) ... [2021-02-19 17:58:16,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff5fcfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:58:16, skipping insertion in model container [2021-02-19 17:58:16,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:58:16" (3/3) ... [2021-02-19 17:58:16,336 INFO L111 eAbstractionObserver]: Analyzing ICFG ms1f.c [2021-02-19 17:58:16,352 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:58:16,366 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:58:16,412 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:58:16,441 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:58:16,441 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:58:16,441 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:58:16,441 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:58:16,441 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:58:16,441 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:58:16,442 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:58:16,442 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:58:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-02-19 17:58:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:58:16,466 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:58:16,467 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] [2021-02-19 17:58:16,467 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:58:16,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:58:16,473 INFO L82 PathProgramCache]: Analyzing trace with hash 863653859, now seen corresponding path program 1 times [2021-02-19 17:58:16,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:58:16,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236717826] [2021-02-19 17:58:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:58:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:16,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:16,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:16,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:16,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:16,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:58:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:16,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:16,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:16,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-19 17:58:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:16,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:16,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:16,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:16,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:58:16,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236717826] [2021-02-19 17:58:16,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:58:16,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:58:16,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251900153] [2021-02-19 17:58:16,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:58:16,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:58:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:58:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:58:16,857 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2021-02-19 17:58:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:58:16,961 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-02-19 17:58:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:58:16,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-19 17:58:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:58:16,972 INFO L225 Difference]: With dead ends: 54 [2021-02-19 17:58:16,972 INFO L226 Difference]: Without dead ends: 25 [2021-02-19 17:58:16,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:58:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-02-19 17:58:17,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-02-19 17:58:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-19 17:58:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-02-19 17:58:17,026 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2021-02-19 17:58:17,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:58:17,026 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-02-19 17:58:17,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-19 17:58:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-02-19 17:58:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:58:17,028 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:58:17,028 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] [2021-02-19 17:58:17,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:58:17,028 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:58:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:58:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1121819297, now seen corresponding path program 1 times [2021-02-19 17:58:17,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:58:17,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620857769] [2021-02-19 17:58:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:58:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:17,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:17,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:17,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:17,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:58:17,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:17,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:58:17,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:17,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:17,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:58:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:17,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:17,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:17,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-19 17:58:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:17,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:17,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:58:17,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620857769] [2021-02-19 17:58:17,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:58:17,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:58:17,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330569625] [2021-02-19 17:58:17,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:58:17,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:58:17,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:58:17,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:58:17,181 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2021-02-19 17:58:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:58:17,320 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-02-19 17:58:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:58:17,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2021-02-19 17:58:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:58:17,322 INFO L225 Difference]: With dead ends: 40 [2021-02-19 17:58:17,322 INFO L226 Difference]: Without dead ends: 30 [2021-02-19 17:58:17,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:58:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-19 17:58:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-02-19 17:58:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-19 17:58:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-02-19 17:58:17,333 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2021-02-19 17:58:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:58:17,334 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-02-19 17:58:17,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 17:58:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-02-19 17:58:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:58:17,335 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:58:17,335 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] [2021-02-19 17:58:17,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:58:17,336 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:58:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:58:17,337 INFO L82 PathProgramCache]: Analyzing trace with hash -667943349, now seen corresponding path program 1 times [2021-02-19 17:58:17,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:58:17,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144200638] [2021-02-19 17:58:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:58:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:58:17,401 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:58:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:58:17,467 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:58:17,499 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-19 17:58:17,500 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-19 17:58:17,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:58:17,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:58:17 BoogieIcfgContainer [2021-02-19 17:58:17,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:58:17,549 INFO L168 Benchmark]: Toolchain (without parser) took 2165.65 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 63.1 MB in the end (delta: 64.2 MB). Peak memory consumption was 64.3 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:17,550 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 214.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:58:17,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:17,552 INFO L168 Benchmark]: Boogie Preprocessor took 44.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:17,553 INFO L168 Benchmark]: RCFGBuilder took 599.15 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 131.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:17,554 INFO L168 Benchmark]: TraceAbstraction took 1229.23 ms. Allocated memory is still 151.0 MB. Free memory was 131.3 MB in the beginning and 63.1 MB in the end (delta: 68.2 MB). Peak memory consumption was 68.2 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:17,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 214.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 599.15 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 131.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1229.23 ms. Allocated memory is still 151.0 MB. Free memory was 131.3 MB in the beginning and 63.1 MB in the end (delta: 68.2 MB). Peak memory consumption was 68.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=118, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={8:0}] [L31] COND TRUE i