/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/condgf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:15:34,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:15:34,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:15:34,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:15:34,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:15:34,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:15:34,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:15:34,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:15:34,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:15:34,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:15:34,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:15:34,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:15:34,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:15:34,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:15:34,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:15:34,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:15:34,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:15:34,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:15:34,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:15:34,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:15:34,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:15:34,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:15:34,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:15:34,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:15:34,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:15:34,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:15:34,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:15:34,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:15:34,947 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:15:34,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:15:34,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:15:34,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:15:34,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:15:34,948 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:15:34,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:15:34,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:15:34,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:15:34,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:15:34,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:15:34,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:15:34,950 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:15:35,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:15:35,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:15:35,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:15:35,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:15:35,427 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:15:35,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condgf.c [2021-02-24 00:15:35,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17eaa3193/4827ce9d6b5e4f0ebe4830fc5a982fd5/FLAG1a9c3bc01 [2021-02-24 00:15:36,259 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:15:36,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condgf.c [2021-02-24 00:15:36,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17eaa3193/4827ce9d6b5e4f0ebe4830fc5a982fd5/FLAG1a9c3bc01 [2021-02-24 00:15:36,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17eaa3193/4827ce9d6b5e4f0ebe4830fc5a982fd5 [2021-02-24 00:15:36,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:15:36,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:15:36,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:15:36,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:15:36,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:15:36,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:15:36" (1/1) ... [2021-02-24 00:15:36,635 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 24.02 12:15:36, skipping insertion in model container [2021-02-24 00:15:36,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:15:36" (1/1) ... [2021-02-24 00:15:36,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:15:36,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:15:36,842 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/condgf.c[589,602] [2021-02-24 00:15:36,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:15:36,880 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:15:36,896 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/condgf.c[589,602] [2021-02-24 00:15:36,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:15:36,927 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:15:36,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36 WrapperNode [2021-02-24 00:15:36,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:15:36,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:15:36,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:15:36,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:15:36,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36" (1/1) ... [2021-02-24 00:15:36,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36" (1/1) ... [2021-02-24 00:15:36,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36" (1/1) ... [2021-02-24 00:15:36,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36" (1/1) ... [2021-02-24 00:15:36,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36" (1/1) ... [2021-02-24 00:15:36,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36" (1/1) ... [2021-02-24 00:15:36,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36" (1/1) ... [2021-02-24 00:15:36,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:15:36,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:15:36,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:15:36,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:15:36,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36" (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 [2021-02-24 00:15:37,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:15:37,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:15:37,098 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:15:37,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:15:37,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:15:37,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:15:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:15:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:15:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:15:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:15:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:15:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:15:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:15:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 00:15:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:15:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 00:15:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:15:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:15:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:15:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:15:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:15:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:15:37,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:15:37,782 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-24 00:15:37,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:15:37 BoogieIcfgContainer [2021-02-24 00:15:37,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:15:37,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:15:37,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:15:37,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:15:37,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:15:36" (1/3) ... [2021-02-24 00:15:37,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a84f26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:15:37, skipping insertion in model container [2021-02-24 00:15:37,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:36" (2/3) ... [2021-02-24 00:15:37,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a84f26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:15:37, skipping insertion in model container [2021-02-24 00:15:37,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:15:37" (3/3) ... [2021-02-24 00:15:37,795 INFO L111 eAbstractionObserver]: Analyzing ICFG condgf.c [2021-02-24 00:15:37,803 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:15:37,809 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:15:37,832 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:15:37,865 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:15:37,865 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:15:37,866 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:15:37,866 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:15:37,866 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:15:37,866 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:15:37,866 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:15:37,867 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:15:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2021-02-24 00:15:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-24 00:15:37,904 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:15:37,905 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] [2021-02-24 00:15:37,906 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:15:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:15:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2120485220, now seen corresponding path program 1 times [2021-02-24 00:15:37,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:15:37,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229997152] [2021-02-24 00:15:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:15:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:38,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:38,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:38,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:15:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:38,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:38,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:15:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:38,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:15:38,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229997152] [2021-02-24 00:15:38,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:15:38,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:15:38,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017659629] [2021-02-24 00:15:38,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:15:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:15:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:15:38,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:15:38,369 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 3 states. [2021-02-24 00:15:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:15:38,662 INFO L93 Difference]: Finished difference Result 141 states and 162 transitions. [2021-02-24 00:15:38,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:15:38,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-02-24 00:15:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:15:38,674 INFO L225 Difference]: With dead ends: 141 [2021-02-24 00:15:38,674 INFO L226 Difference]: Without dead ends: 72 [2021-02-24 00:15:38,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:15:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-24 00:15:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-02-24 00:15:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-02-24 00:15:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-02-24 00:15:38,738 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 40 [2021-02-24 00:15:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:15:38,739 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-02-24 00:15:38,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:15:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-02-24 00:15:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-24 00:15:38,742 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:15:38,742 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] [2021-02-24 00:15:38,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:15:38,743 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:15:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:15:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1012737605, now seen corresponding path program 1 times [2021-02-24 00:15:38,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:15:38,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429243691] [2021-02-24 00:15:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:15:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:38,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:38,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:15:38,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:15:38,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:38,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:15:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:38,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:38,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:15:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:38,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:38,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:15:39,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429243691] [2021-02-24 00:15:39,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:15:39,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:15:39,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310187890] [2021-02-24 00:15:39,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:15:39,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:15:39,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:15:39,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:15:39,005 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 5 states. [2021-02-24 00:15:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:15:39,348 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2021-02-24 00:15:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:15:39,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2021-02-24 00:15:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:15:39,358 INFO L225 Difference]: With dead ends: 142 [2021-02-24 00:15:39,358 INFO L226 Difference]: Without dead ends: 103 [2021-02-24 00:15:39,361 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 [2021-02-24 00:15:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-24 00:15:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2021-02-24 00:15:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-24 00:15:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-02-24 00:15:39,407 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 40 [2021-02-24 00:15:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:15:39,407 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-02-24 00:15:39,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:15:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-02-24 00:15:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-24 00:15:39,410 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:15:39,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:15:39,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:15:39,410 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:15:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:15:39,411 INFO L82 PathProgramCache]: Analyzing trace with hash -800271576, now seen corresponding path program 1 times [2021-02-24 00:15:39,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:15:39,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981134647] [2021-02-24 00:15:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:15:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:15:39,471 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:15:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:15:39,510 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:15:39,550 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:15:39,550 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:15:39,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:15:39,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:15:39 BoogieIcfgContainer [2021-02-24 00:15:39,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:15:39,622 INFO L168 Benchmark]: Toolchain (without parser) took 3007.95 ms. Allocated memory is still 152.0 MB. Free memory was 128.8 MB in the beginning and 85.5 MB in the end (delta: 43.3 MB). Peak memory consumption was 44.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:39,622 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 152.0 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:15:39,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.66 ms. Allocated memory is still 152.0 MB. Free memory was 127.6 MB in the beginning and 117.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:39,624 INFO L168 Benchmark]: Boogie Preprocessor took 52.22 ms. Allocated memory is still 152.0 MB. Free memory was 117.0 MB in the beginning and 115.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:39,625 INFO L168 Benchmark]: RCFGBuilder took 802.47 ms. Allocated memory is still 152.0 MB. Free memory was 115.3 MB in the beginning and 129.2 MB in the end (delta: -13.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:39,626 INFO L168 Benchmark]: TraceAbstraction took 1832.96 ms. Allocated memory is still 152.0 MB. Free memory was 128.7 MB in the beginning and 85.5 MB in the end (delta: 43.1 MB). Peak memory consumption was 44.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:39,629 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 152.0 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 300.66 ms. Allocated memory is still 152.0 MB. Free memory was 127.6 MB in the beginning and 117.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.22 ms. Allocated memory is still 152.0 MB. Free memory was 117.0 MB in the beginning and 115.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 802.47 ms. Allocated memory is still 152.0 MB. Free memory was 115.3 MB in the beginning and 129.2 MB in the end (delta: -13.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1832.96 ms. Allocated memory is still 152.0 MB. Free memory was 128.7 MB in the beginning and 85.5 MB in the end (delta: 43.1 MB). Peak memory consumption was 44.7 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)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [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; VAL [\old(N)=0, N=1] [L28] long long sum[1]; VAL [\old(N)=0, N=1, sum={11:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={11:0}] [L31] sum[0] = 0 VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={11:0}] [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={11:0}] [L32] COND TRUE i