/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/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:11,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:11,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:11,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:11,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:11,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:11,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:11,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:11,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:11,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:11,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:11,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:11,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:11,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:11,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:11,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:11,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:11,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:11,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:11,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:11,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:11,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:11,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:11,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:11,734 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:11,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:11,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:11,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:11,749 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 06:34:11,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:11,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:11,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:11,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:11,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:11,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:11,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:11,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:11,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:11,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:11,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:11,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:11,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:11,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:11,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:11,772 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:11,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:11,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:11,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:11,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:11,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:11,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:11,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:12,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:12,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:12,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:12,222 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:12,223 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:12,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn2f.c [2020-11-07 06:34:12,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcbc8485f/e35ea05464d34545a6af4e09608baf77/FLAG0152cfb41 [2020-11-07 06:34:13,029 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:13,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2f.c [2020-11-07 06:34:13,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcbc8485f/e35ea05464d34545a6af4e09608baf77/FLAG0152cfb41 [2020-11-07 06:34:13,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcbc8485f/e35ea05464d34545a6af4e09608baf77 [2020-11-07 06:34:13,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:13,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:13,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:13,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:13,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:13,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:13" (1/1) ... [2020-11-07 06:34:13,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626d8810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13, skipping insertion in model container [2020-11-07 06:34:13,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:13" (1/1) ... [2020-11-07 06:34:13,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:13,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:13,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:13,370 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:13,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:13,437 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:13,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13 WrapperNode [2020-11-07 06:34:13,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:13,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:13,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:13,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:13,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13" (1/1) ... [2020-11-07 06:34:13,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13" (1/1) ... [2020-11-07 06:34:13,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13" (1/1) ... [2020-11-07 06:34:13,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13" (1/1) ... [2020-11-07 06:34:13,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13" (1/1) ... [2020-11-07 06:34:13,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13" (1/1) ... [2020-11-07 06:34:13,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13" (1/1) ... [2020-11-07 06:34:13,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:13,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:13,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:13,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:13,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13" (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 06:34:13,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:13,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:13,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:13,626 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:34:13,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:13,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:13,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:13,627 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:13,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:13,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:34:13,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:13,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:34:13,628 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:13,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:13,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:13,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:13,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:13,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:13,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:13,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:13,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:14,160 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:14,160 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 06:34:14,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:14 BoogieIcfgContainer [2020-11-07 06:34:14,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:14,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:14,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:14,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:14,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:13" (1/3) ... [2020-11-07 06:34:14,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d162880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:14, skipping insertion in model container [2020-11-07 06:34:14,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:13" (2/3) ... [2020-11-07 06:34:14,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d162880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:14, skipping insertion in model container [2020-11-07 06:34:14,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:14" (3/3) ... [2020-11-07 06:34:14,173 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2020-11-07 06:34:14,191 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:14,195 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:14,209 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:14,234 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:14,235 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:14,235 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:14,235 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:14,235 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:14,235 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:14,236 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:14,236 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-11-07 06:34:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 06:34:14,266 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:14,267 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] [2020-11-07 06:34:14,267 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash 396138475, now seen corresponding path program 1 times [2020-11-07 06:34:14,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:14,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711338388] [2020-11-07 06:34:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,702 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 06:34:14,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711338388] [2020-11-07 06:34:14,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:14,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:34:14,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674880191] [2020-11-07 06:34:14,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:34:14,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:14,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:34:14,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:14,733 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2020-11-07 06:34:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:15,103 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-11-07 06:34:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:34:15,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-11-07 06:34:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:15,115 INFO L225 Difference]: With dead ends: 119 [2020-11-07 06:34:15,115 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 06:34:15,119 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 [2020-11-07 06:34:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 06:34:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-07 06:34:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-07 06:34:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-11-07 06:34:15,176 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 41 [2020-11-07 06:34:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:15,177 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-11-07 06:34:15,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:34:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-11-07 06:34:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 06:34:15,179 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:15,179 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] [2020-11-07 06:34:15,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:15,180 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1876757282, now seen corresponding path program 1 times [2020-11-07 06:34:15,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:15,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587227247] [2020-11-07 06:34:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:15,210 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-07 06:34:15,211 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-11-07 06:34:15,211 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:34:15,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:15,235 WARN L253 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-07 06:34:15,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:34:15 BoogieIcfgContainer [2020-11-07 06:34:15,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:34:15,238 INFO L168 Benchmark]: Toolchain (without parser) took 2168.83 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 82.4 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.6 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,239 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:34:15,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.00 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,241 INFO L168 Benchmark]: Boogie Preprocessor took 91.77 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,243 INFO L168 Benchmark]: RCFGBuilder took 630.75 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 128.5 MB in the end (delta: -13.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,244 INFO L168 Benchmark]: TraceAbstraction took 1070.99 ms. Allocated memory is still 151.0 MB. Free memory was 128.0 MB in the beginning and 82.4 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 363.00 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 91.77 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 630.75 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 128.5 MB in the end (delta: -13.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1070.99 ms. Allocated memory is still 151.0 MB. Free memory was 128.0 MB in the beginning and 82.4 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.1 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 *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 [L34] COND FALSE !(i