/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/res1f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:03,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:03,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:03,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:03,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:16:03,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:16:03,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:16:03,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:16:03,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:16:03,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:16:03,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:16:03,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:16:03,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:16:03,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:16:03,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:16:03,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:16:03,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:16:03,845 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 00:16:03,873 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:03,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:03,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:03,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:03,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:03,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:03,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:03,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:03,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:03,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:03,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:03,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:03,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:03,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:03,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:03,884 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:03,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:03,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:03,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:03,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:03,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:03,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:03,885 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:04,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:04,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:04,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:04,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:04,298 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:04,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1f.c [2021-02-24 00:16:04,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/111439204/4df6132cec0949f68280292d2ec2a032/FLAG99233266c [2021-02-24 00:16:05,110 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:05,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res1f.c [2021-02-24 00:16:05,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/111439204/4df6132cec0949f68280292d2ec2a032/FLAG99233266c [2021-02-24 00:16:05,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/111439204/4df6132cec0949f68280292d2ec2a032 [2021-02-24 00:16:05,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:05,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:05,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:05,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:05,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:05,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:05" (1/1) ... [2021-02-24 00:16:05,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fefb7c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05, skipping insertion in model container [2021-02-24 00:16:05,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:05" (1/1) ... [2021-02-24 00:16:05,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:05,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:05,687 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/res1f.c[588,601] [2021-02-24 00:16:05,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:05,722 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:05,737 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/res1f.c[588,601] [2021-02-24 00:16:05,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:05,771 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:05,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05 WrapperNode [2021-02-24 00:16:05,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:05,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:05,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:05,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:05,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05" (1/1) ... [2021-02-24 00:16:05,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05" (1/1) ... [2021-02-24 00:16:05,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05" (1/1) ... [2021-02-24 00:16:05,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05" (1/1) ... [2021-02-24 00:16:05,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05" (1/1) ... [2021-02-24 00:16:05,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05" (1/1) ... [2021-02-24 00:16:05,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05" (1/1) ... [2021-02-24 00:16:05,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:05,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:05,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:05,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:05,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05" (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 00:16:05,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:05,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:05,954 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:05,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:16:05,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:05,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:05,958 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:16:05,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:05,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:16:05,959 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 00:16:05,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:05,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 00:16:05,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:05,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:05,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:05,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:06,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:06,697 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-24 00:16:06,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:06 BoogieIcfgContainer [2021-02-24 00:16:06,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:06,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:06,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:06,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:06,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:05" (1/3) ... [2021-02-24 00:16:06,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17af0e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:06, skipping insertion in model container [2021-02-24 00:16:06,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:05" (2/3) ... [2021-02-24 00:16:06,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17af0e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:06, skipping insertion in model container [2021-02-24 00:16:06,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:06" (3/3) ... [2021-02-24 00:16:06,714 INFO L111 eAbstractionObserver]: Analyzing ICFG res1f.c [2021-02-24 00:16:06,722 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:06,730 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:06,754 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:06,790 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:06,790 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:06,791 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:06,791 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:06,791 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:06,791 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:06,791 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:06,791 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2021-02-24 00:16:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 00:16:06,829 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:06,830 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] [2021-02-24 00:16:06,831 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1991564409, now seen corresponding path program 1 times [2021-02-24 00:16:06,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:06,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685015393] [2021-02-24 00:16:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:07,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:07,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:07,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:07,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:07,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:07,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:07,201 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 00:16:07,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685015393] [2021-02-24 00:16:07,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:07,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:07,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059110275] [2021-02-24 00:16:07,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:07,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:07,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:07,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:07,229 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 3 states. [2021-02-24 00:16:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:07,454 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2021-02-24 00:16:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:07,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-02-24 00:16:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:07,465 INFO L225 Difference]: With dead ends: 137 [2021-02-24 00:16:07,466 INFO L226 Difference]: Without dead ends: 67 [2021-02-24 00:16:07,470 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 00:16:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-24 00:16:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-02-24 00:16:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-24 00:16:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-02-24 00:16:07,527 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 42 [2021-02-24 00:16:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:07,528 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-02-24 00:16:07,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-02-24 00:16:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 00:16:07,531 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:07,531 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] [2021-02-24 00:16:07,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:07,533 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash 749526049, now seen corresponding path program 1 times [2021-02-24 00:16:07,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:07,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759336917] [2021-02-24 00:16:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:07,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:07,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:07,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:07,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:07,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:07,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:07,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:07,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:07,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:07,732 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 00:16:07,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759336917] [2021-02-24 00:16:07,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:07,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:16:07,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328932614] [2021-02-24 00:16:07,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:16:07,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:07,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:16:07,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:16:07,736 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 5 states. [2021-02-24 00:16:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:08,012 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2021-02-24 00:16:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:16:08,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2021-02-24 00:16:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:08,020 INFO L225 Difference]: With dead ends: 123 [2021-02-24 00:16:08,020 INFO L226 Difference]: Without dead ends: 91 [2021-02-24 00:16:08,022 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 00:16:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-24 00:16:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2021-02-24 00:16:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-24 00:16:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-02-24 00:16:08,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 42 [2021-02-24 00:16:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:08,070 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-02-24 00:16:08,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:16:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-02-24 00:16:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-02-24 00:16:08,076 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:08,076 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, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:08,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:08,077 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:08,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash 558292563, now seen corresponding path program 1 times [2021-02-24 00:16:08,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:08,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389493680] [2021-02-24 00:16:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:08,191 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:08,243 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:08,287 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:16:08,287 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:08,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:08,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:08 BoogieIcfgContainer [2021-02-24 00:16:08,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:08,383 INFO L168 Benchmark]: Toolchain (without parser) took 2899.07 ms. Allocated memory is still 157.3 MB. Free memory was 133.5 MB in the beginning and 88.0 MB in the end (delta: 45.6 MB). Peak memory consumption was 46.3 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:08,385 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 157.3 MB. Free memory was 132.6 MB in the beginning and 132.5 MB in the end (delta: 100.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:08,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.37 ms. Allocated memory is still 157.3 MB. Free memory was 132.3 MB in the beginning and 122.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:08,389 INFO L168 Benchmark]: Boogie Preprocessor took 47.71 ms. Allocated memory is still 157.3 MB. Free memory was 122.4 MB in the beginning and 120.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:08,392 INFO L168 Benchmark]: RCFGBuilder took 878.21 ms. Allocated memory is still 157.3 MB. Free memory was 120.7 MB in the beginning and 130.8 MB in the end (delta: -10.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:08,394 INFO L168 Benchmark]: TraceAbstraction took 1677.55 ms. Allocated memory is still 157.3 MB. Free memory was 130.3 MB in the beginning and 88.0 MB in the end (delta: 42.3 MB). Peak memory consumption was 43.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:08,401 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 157.3 MB. Free memory was 132.6 MB in the beginning and 132.5 MB in the end (delta: 100.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 275.37 ms. Allocated memory is still 157.3 MB. Free memory was 132.3 MB in the beginning and 122.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.71 ms. Allocated memory is still 157.3 MB. Free memory was 122.4 MB in the beginning and 120.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 878.21 ms. Allocated memory is still 157.3 MB. Free memory was 120.7 MB in the beginning and 130.8 MB in the end (delta: -10.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1677.55 ms. Allocated memory is still 157.3 MB. Free memory was 130.3 MB in the beginning and 88.0 MB in the end (delta: 42.3 MB). Peak memory consumption was 43.4 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={7:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-2:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={7:0}] [L30] int *b = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-2:0}, b={5:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={5:0}, N=1, sum={7:0}] [L32] sum[0] = 1 VAL [\old(N)=0, a={-2:0}, b={5:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={5:0}, N=1, sum={7:0}] [L33] i=0 VAL [\old(N)=0, a={-2:0}, b={5:0}, i=0, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={5:0}, N=1, sum={7:0}] [L33] COND TRUE i