/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/ncompf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:00,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:00,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:00,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:00,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:16:00,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:16:01,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:16:01,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:16:01,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:16:01,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:16:01,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:16:01,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:16:01,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:16:01,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:16:01,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:16:01,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:16:01,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:16:01,063 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 00:16:01,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:01,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:01,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:01,088 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:01,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:01,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:01,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:01,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:01,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:01,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:01,089 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:01,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:01,090 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:01,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:01,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:01,091 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:01,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:01,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:01,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:01,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:01,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:01,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:01,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:01,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:01,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:01,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:01,504 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:01,504 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:01,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ncompf.c [2021-02-24 00:16:01,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3b77db96/a1d85d6b51cc4065ba28698444cd55fe/FLAGf402362fd [2021-02-24 00:16:02,303 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:02,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ncompf.c [2021-02-24 00:16:02,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3b77db96/a1d85d6b51cc4065ba28698444cd55fe/FLAGf402362fd [2021-02-24 00:16:02,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3b77db96/a1d85d6b51cc4065ba28698444cd55fe [2021-02-24 00:16:02,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:02,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:02,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:02,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:02,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:02,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:02" (1/1) ... [2021-02-24 00:16:02,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e449bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02, skipping insertion in model container [2021-02-24 00:16:02,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:02" (1/1) ... [2021-02-24 00:16:02,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:02,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:02,857 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/ncompf.c[589,602] [2021-02-24 00:16:02,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:02,889 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:02,902 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/ncompf.c[589,602] [2021-02-24 00:16:02,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:02,930 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:02,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02 WrapperNode [2021-02-24 00:16:02,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:02,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:02,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:02,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:02,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02" (1/1) ... [2021-02-24 00:16:02,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02" (1/1) ... [2021-02-24 00:16:02,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02" (1/1) ... [2021-02-24 00:16:02,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02" (1/1) ... [2021-02-24 00:16:02,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02" (1/1) ... [2021-02-24 00:16:02,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02" (1/1) ... [2021-02-24 00:16:02,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02" (1/1) ... [2021-02-24 00:16:02,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:02,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:02,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:02,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:02,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02" (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 00:16:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:16:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:16:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:16:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 00:16:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 00:16:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:03,749 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:03,750 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-24 00:16:03,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:03 BoogieIcfgContainer [2021-02-24 00:16:03,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:03,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:03,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:03,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:03,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:02" (1/3) ... [2021-02-24 00:16:03,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec02694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:03, skipping insertion in model container [2021-02-24 00:16:03,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:02" (2/3) ... [2021-02-24 00:16:03,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec02694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:03, skipping insertion in model container [2021-02-24 00:16:03,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:03" (3/3) ... [2021-02-24 00:16:03,763 INFO L111 eAbstractionObserver]: Analyzing ICFG ncompf.c [2021-02-24 00:16:03,772 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:03,778 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:03,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:03,827 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:03,827 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:03,828 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:03,828 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:03,828 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:03,828 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:03,828 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:03,828 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2021-02-24 00:16:03,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-24 00:16:03,861 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:03,862 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] [2021-02-24 00:16:03,862 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash -894278296, now seen corresponding path program 1 times [2021-02-24 00:16:03,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:03,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715677840] [2021-02-24 00:16:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:04,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:04,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:04,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:04,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:04,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:04,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:04,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:04,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:04,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:04,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:04,375 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 00:16:04,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715677840] [2021-02-24 00:16:04,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:04,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:04,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049581093] [2021-02-24 00:16:04,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:04,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:04,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:04,408 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 3 states. [2021-02-24 00:16:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:04,627 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2021-02-24 00:16:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:04,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2021-02-24 00:16:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:04,639 INFO L225 Difference]: With dead ends: 141 [2021-02-24 00:16:04,639 INFO L226 Difference]: Without dead ends: 74 [2021-02-24 00:16:04,643 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 00:16:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-24 00:16:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-02-24 00:16:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-24 00:16:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-02-24 00:16:04,700 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 45 [2021-02-24 00:16:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:04,701 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-02-24 00:16:04,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-02-24 00:16:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-24 00:16:04,703 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:04,704 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] [2021-02-24 00:16:04,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:04,705 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:04,706 INFO L82 PathProgramCache]: Analyzing trace with hash 478699394, now seen corresponding path program 1 times [2021-02-24 00:16:04,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:04,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733166781] [2021-02-24 00:16:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:04,749 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-02-24 00:16:04,750 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-24 00:16:04,750 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:04,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:04,776 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-24 00:16:04,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:04 BoogieIcfgContainer [2021-02-24 00:16:04,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:04,779 INFO L168 Benchmark]: Toolchain (without parser) took 2103.44 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 75.3 MB in the end (delta: 51.7 MB). Peak memory consumption was 50.9 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:04,779 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:04,781 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.33 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 115.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:04,782 INFO L168 Benchmark]: Boogie Preprocessor took 50.04 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:04,782 INFO L168 Benchmark]: RCFGBuilder took 765.99 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 127.2 MB in the end (delta: -13.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:04,783 INFO L168 Benchmark]: TraceAbstraction took 1022.06 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 75.3 MB in the end (delta: 51.4 MB). Peak memory consumption was 51.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:04,787 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.33 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 115.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.04 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 765.99 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 127.2 MB in the end (delta: -13.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1022.06 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 75.3 MB in the end (delta: 51.4 MB). Peak memory consumption was 51.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L35] i=1 [L35] COND FALSE !(i