/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/s22iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:08,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:08,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:09,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:09,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:16:09,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:16:09,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:16:09,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:16:09,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:16:09,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:16:09,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:16:09,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:16:09,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:16:09,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:16:09,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:16:09,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:16:09,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:16:09,121 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 00:16:09,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:09,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:09,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:09,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:09,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:09,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:09,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:09,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:09,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:09,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:09,155 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:09,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:09,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:09,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:09,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:09,157 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:09,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:09,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:09,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:09,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:09,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:09,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:09,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:09,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:09,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:09,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:09,679 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:09,680 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:09,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s22iff.c [2021-02-24 00:16:09,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df1ab0334/404f59602e374ca18885d40210a3a0a4/FLAG73960a644 [2021-02-24 00:16:10,399 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:10,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s22iff.c [2021-02-24 00:16:10,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df1ab0334/404f59602e374ca18885d40210a3a0a4/FLAG73960a644 [2021-02-24 00:16:10,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df1ab0334/404f59602e374ca18885d40210a3a0a4 [2021-02-24 00:16:10,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:10,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:10,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:10,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:10,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:10,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:10" (1/1) ... [2021-02-24 00:16:10,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4792cac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:10, skipping insertion in model container [2021-02-24 00:16:10,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:10" (1/1) ... [2021-02-24 00:16:10,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:10,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:10,993 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/s22iff.c[589,602] [2021-02-24 00:16:11,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:11,030 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:11,044 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/s22iff.c[589,602] [2021-02-24 00:16:11,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:11,088 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:11,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11 WrapperNode [2021-02-24 00:16:11,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:11,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:11,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:11,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:11,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11" (1/1) ... [2021-02-24 00:16:11,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11" (1/1) ... [2021-02-24 00:16:11,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11" (1/1) ... [2021-02-24 00:16:11,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11" (1/1) ... [2021-02-24 00:16:11,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11" (1/1) ... [2021-02-24 00:16:11,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11" (1/1) ... [2021-02-24 00:16:11,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11" (1/1) ... [2021-02-24 00:16:11,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:11,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:11,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:11,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:11,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11" (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 00:16:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:16:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:16:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:16:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 00:16:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 00:16:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:11,905 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:11,905 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-24 00:16:11,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:11 BoogieIcfgContainer [2021-02-24 00:16:11,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:11,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:11,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:11,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:11,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:10" (1/3) ... [2021-02-24 00:16:11,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fb010d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:11, skipping insertion in model container [2021-02-24 00:16:11,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:11" (2/3) ... [2021-02-24 00:16:11,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fb010d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:11, skipping insertion in model container [2021-02-24 00:16:11,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:11" (3/3) ... [2021-02-24 00:16:11,918 INFO L111 eAbstractionObserver]: Analyzing ICFG s22iff.c [2021-02-24 00:16:11,926 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:11,933 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:11,954 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:11,982 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:11,982 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:11,982 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:11,983 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:11,983 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:11,983 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:11,983 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:11,983 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2021-02-24 00:16:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-24 00:16:12,015 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:12,016 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] [2021-02-24 00:16:12,016 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:12,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1439408661, now seen corresponding path program 1 times [2021-02-24 00:16:12,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:12,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776153265] [2021-02-24 00:16:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:12,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:12,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:12,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:12,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:12,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:12,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:12,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:12,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:12,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:12,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:12,386 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 00:16:12,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776153265] [2021-02-24 00:16:12,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:12,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:12,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102491438] [2021-02-24 00:16:12,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:12,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:12,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:12,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:12,425 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2021-02-24 00:16:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:12,912 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2021-02-24 00:16:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:12,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2021-02-24 00:16:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:12,924 INFO L225 Difference]: With dead ends: 149 [2021-02-24 00:16:12,924 INFO L226 Difference]: Without dead ends: 73 [2021-02-24 00:16:12,929 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 00:16:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-24 00:16:12,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-02-24 00:16:12,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-24 00:16:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-02-24 00:16:12,987 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 38 [2021-02-24 00:16:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:12,988 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-02-24 00:16:12,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-02-24 00:16:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-24 00:16:12,993 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:12,994 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] [2021-02-24 00:16:12,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:12,994 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:12,995 INFO L82 PathProgramCache]: Analyzing trace with hash -415145042, now seen corresponding path program 1 times [2021-02-24 00:16:12,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:12,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617105707] [2021-02-24 00:16:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:13,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:13,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:13,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:13,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:13,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:13,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:13,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:13,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:13,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:13,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:13,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:13,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:13,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:13,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:13,242 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 00:16:13,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617105707] [2021-02-24 00:16:13,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:13,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:16:13,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226287420] [2021-02-24 00:16:13,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:16:13,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:13,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:16:13,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:16:13,255 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 5 states. [2021-02-24 00:16:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:13,598 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2021-02-24 00:16:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:16:13,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2021-02-24 00:16:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:13,602 INFO L225 Difference]: With dead ends: 147 [2021-02-24 00:16:13,602 INFO L226 Difference]: Without dead ends: 107 [2021-02-24 00:16:13,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:16:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-24 00:16:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2021-02-24 00:16:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-24 00:16:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-02-24 00:16:13,623 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 38 [2021-02-24 00:16:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:13,624 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-02-24 00:16:13,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:16:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-02-24 00:16:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-24 00:16:13,627 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:13,627 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] [2021-02-24 00:16:13,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:13,627 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1781170039, now seen corresponding path program 1 times [2021-02-24 00:16:13,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:13,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964737661] [2021-02-24 00:16:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:13,682 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:13,723 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:13,801 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:16:13,802 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:13,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:13,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:13 BoogieIcfgContainer [2021-02-24 00:16:13,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:13,923 INFO L168 Benchmark]: Toolchain (without parser) took 3132.19 ms. Allocated memory was 154.1 MB in the beginning and 197.1 MB in the end (delta: 43.0 MB). Free memory was 130.3 MB in the beginning and 140.6 MB in the end (delta: -10.2 MB). Peak memory consumption was 33.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:13,925 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:13,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.56 ms. Allocated memory is still 154.1 MB. Free memory was 129.3 MB in the beginning and 118.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:13,930 INFO L168 Benchmark]: Boogie Preprocessor took 88.12 ms. Allocated memory is still 154.1 MB. Free memory was 118.5 MB in the beginning and 116.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:13,932 INFO L168 Benchmark]: RCFGBuilder took 725.23 ms. Allocated memory is still 154.1 MB. Free memory was 116.8 MB in the beginning and 129.9 MB in the end (delta: -13.1 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:13,937 INFO L168 Benchmark]: TraceAbstraction took 2009.93 ms. Allocated memory was 154.1 MB in the beginning and 197.1 MB in the end (delta: 43.0 MB). Free memory was 129.3 MB in the beginning and 140.6 MB in the end (delta: -11.2 MB). Peak memory consumption was 32.3 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:13,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 283.56 ms. Allocated memory is still 154.1 MB. Free memory was 129.3 MB in the beginning and 118.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.12 ms. Allocated memory is still 154.1 MB. Free memory was 118.5 MB in the beginning and 116.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 725.23 ms. Allocated memory is still 154.1 MB. Free memory was 116.8 MB in the beginning and 129.9 MB in the end (delta: -13.1 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2009.93 ms. Allocated memory was 154.1 MB in the beginning and 197.1 MB in the end (delta: 43.0 MB). Free memory was 129.3 MB in the beginning and 140.6 MB in the end (delta: -11.2 MB). Peak memory consumption was 32.3 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={5:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L31] sum[0] = 1 VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L32] COND TRUE i