/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/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:43,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:43,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:43,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:43,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:43,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:43,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:43,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:43,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:43,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:43,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:43,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:43,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:43,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:43,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:43,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:43,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:43,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:43,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:43,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:43,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:43,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:43,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:43,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:43,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:43,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:43,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:43,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:43,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:34:43,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:43,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:43,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:43,609 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:43,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:43,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:43,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:43,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:43,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:43,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:43,610 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:43,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:43,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:43,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:43,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:43,611 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:43,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:43,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:43,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:43,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:43,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:43,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:43,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:44,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:44,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:44,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:44,062 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:44,064 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:44,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-11-07 06:34:44,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c03720d8/57c66c43d22342619ad8a3ecba9ddda1/FLAGb1009a994 [2020-11-07 06:34:44,757 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:44,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-11-07 06:34:44,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c03720d8/57c66c43d22342619ad8a3ecba9ddda1/FLAGb1009a994 [2020-11-07 06:34:45,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c03720d8/57c66c43d22342619ad8a3ecba9ddda1 [2020-11-07 06:34:45,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:45,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:45,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:45,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:45,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:45,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:45" (1/1) ... [2020-11-07 06:34:45,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6f9d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45, skipping insertion in model container [2020-11-07 06:34:45,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:45" (1/1) ... [2020-11-07 06:34:45,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:45,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:45,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:45,384 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:45,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:45,430 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:45,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45 WrapperNode [2020-11-07 06:34:45,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:45,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:45,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:45,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:45,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45" (1/1) ... [2020-11-07 06:34:45,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45" (1/1) ... [2020-11-07 06:34:45,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45" (1/1) ... [2020-11-07 06:34:45,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45" (1/1) ... [2020-11-07 06:34:45,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45" (1/1) ... [2020-11-07 06:34:45,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45" (1/1) ... [2020-11-07 06:34:45,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45" (1/1) ... [2020-11-07 06:34:45,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:45,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:45,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:45,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:45,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45" (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 [2020-11-07 06:34:45,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:45,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:45,589 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:45,589 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:34:45,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:45,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:34:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:34:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:45,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:45,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:45,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:46,229 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:46,229 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 06:34:46,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:46 BoogieIcfgContainer [2020-11-07 06:34:46,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:46,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:46,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:46,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:46,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:45" (1/3) ... [2020-11-07 06:34:46,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643a7278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:46, skipping insertion in model container [2020-11-07 06:34:46,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:45" (2/3) ... [2020-11-07 06:34:46,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643a7278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:46, skipping insertion in model container [2020-11-07 06:34:46,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:46" (3/3) ... [2020-11-07 06:34:46,245 INFO L111 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-11-07 06:34:46,265 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:46,271 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:46,286 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:46,330 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:46,330 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:46,330 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:46,331 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:46,331 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:46,331 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:46,331 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:46,331 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-11-07 06:34:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 06:34:46,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:46,374 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] [2020-11-07 06:34:46,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:46,388 INFO L82 PathProgramCache]: Analyzing trace with hash -109308390, now seen corresponding path program 1 times [2020-11-07 06:34:46,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:46,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451853653] [2020-11-07 06:34:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:46,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:46,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451853653] [2020-11-07 06:34:46,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:46,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:46,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519396040] [2020-11-07 06:34:46,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:46,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:46,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:46,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:46,888 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 5 states. [2020-11-07 06:34:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:47,314 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2020-11-07 06:34:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:34:47,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-11-07 06:34:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:47,326 INFO L225 Difference]: With dead ends: 148 [2020-11-07 06:34:47,327 INFO L226 Difference]: Without dead ends: 80 [2020-11-07 06:34:47,331 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 [2020-11-07 06:34:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-07 06:34:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2020-11-07 06:34:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 06:34:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-11-07 06:34:47,389 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 37 [2020-11-07 06:34:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:47,390 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-11-07 06:34:47,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-11-07 06:34:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 06:34:47,393 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:47,393 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] [2020-11-07 06:34:47,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:47,394 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:47,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1788289630, now seen corresponding path program 1 times [2020-11-07 06:34:47,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:47,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559351211] [2020-11-07 06:34:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:48,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:48,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:48,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559351211] [2020-11-07 06:34:48,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:48,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:34:48,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390503872] [2020-11-07 06:34:48,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:34:48,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:48,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:34:48,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:34:48,235 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 20 states. [2020-11-07 06:34:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:49,803 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-11-07 06:34:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:34:49,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-11-07 06:34:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:49,812 INFO L225 Difference]: With dead ends: 114 [2020-11-07 06:34:49,814 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 06:34:49,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:34:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 06:34:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2020-11-07 06:34:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 06:34:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-11-07 06:34:49,867 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 54 [2020-11-07 06:34:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:49,868 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-11-07 06:34:49,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:34:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-11-07 06:34:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 06:34:49,872 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:49,872 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] [2020-11-07 06:34:49,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:49,873 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:49,875 INFO L82 PathProgramCache]: Analyzing trace with hash 856266086, now seen corresponding path program 1 times [2020-11-07 06:34:49,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:49,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597830252] [2020-11-07 06:34:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:49,918 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-07 06:34:49,918 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-11-07 06:34:49,919 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:34:49,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:49,954 WARN L253 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-07 06:34:49,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:34:49 BoogieIcfgContainer [2020-11-07 06:34:49,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:34:49,963 INFO L168 Benchmark]: Toolchain (without parser) took 4824.43 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 129.1 MB in the beginning and 89.8 MB in the end (delta: 39.2 MB). Peak memory consumption was 71.3 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:49,966 INFO L168 Benchmark]: CDTParser took 0.99 ms. Allocated memory is still 153.1 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:34:49,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.59 ms. Allocated memory is still 153.1 MB. Free memory was 128.5 MB in the beginning and 118.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:49,975 INFO L168 Benchmark]: Boogie Preprocessor took 49.55 ms. Allocated memory is still 153.1 MB. Free memory was 118.2 MB in the beginning and 116.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:49,976 INFO L168 Benchmark]: RCFGBuilder took 750.90 ms. Allocated memory is still 153.1 MB. Free memory was 116.5 MB in the beginning and 130.7 MB in the end (delta: -14.2 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:49,977 INFO L168 Benchmark]: TraceAbstraction took 3719.90 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 130.7 MB in the beginning and 89.8 MB in the end (delta: 40.9 MB). Peak memory consumption was 71.8 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:49,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.99 ms. Allocated memory is still 153.1 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.59 ms. Allocated memory is still 153.1 MB. Free memory was 128.5 MB in the beginning and 118.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.55 ms. Allocated memory is still 153.1 MB. Free memory was 118.2 MB in the beginning and 116.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 750.90 ms. Allocated memory is still 153.1 MB. Free memory was 116.5 MB in the beginning and 130.7 MB in the end (delta: -14.2 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3719.90 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 130.7 MB in the beginning and 89.8 MB in the end (delta: 40.9 MB). Peak memory consumption was 71.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() 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 sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 [L32] COND TRUE i