/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:44:27,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:44:27,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:44:27,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:44:27,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:44:27,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:44:27,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:44:27,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:44:27,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:44:27,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:44:27,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:44:27,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:44:27,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:44:27,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:44:27,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:44:27,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:44:27,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:44:27,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:44:27,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:44:27,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:44:27,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:44:27,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:44:27,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:44:27,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:44:27,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:44:27,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:44:27,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:44:27,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:44:27,673 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:44:27,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:44:27,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:44:27,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:44:27,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:44:27,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:44:27,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:44:27,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:44:27,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:44:27,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:44:27,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:44:27,693 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:44:27,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:44:27,693 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:44:27,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:44:27,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:44:27,694 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:44:27,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:44:27,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:44:27,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:44:27,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:44:27,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:44:27,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:44:27,696 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:44:28,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:44:28,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:44:28,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:44:28,041 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:44:28,041 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:44:28,042 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn2f.c [2020-08-22 19:44:28,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ae6d63d/36e429df262f4071919748038f077ea3/FLAG02106c717 [2020-08-22 19:44:28,640 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:44:28,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2f.c [2020-08-22 19:44:28,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ae6d63d/36e429df262f4071919748038f077ea3/FLAG02106c717 [2020-08-22 19:44:28,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ae6d63d/36e429df262f4071919748038f077ea3 [2020-08-22 19:44:28,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:44:28,968 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:44:28,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:28,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:44:28,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:44:28,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:28" (1/1) ... [2020-08-22 19:44:28,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a706625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:28, skipping insertion in model container [2020-08-22 19:44:28,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:28" (1/1) ... [2020-08-22 19:44:28,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:44:29,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:44:29,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:29,209 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:44:29,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:29,248 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:44:29,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29 WrapperNode [2020-08-22 19:44:29,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:29,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:44:29,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:44:29,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:44:29,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29" (1/1) ... [2020-08-22 19:44:29,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29" (1/1) ... [2020-08-22 19:44:29,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29" (1/1) ... [2020-08-22 19:44:29,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29" (1/1) ... [2020-08-22 19:44:29,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29" (1/1) ... [2020-08-22 19:44:29,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29" (1/1) ... [2020-08-22 19:44:29,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29" (1/1) ... [2020-08-22 19:44:29,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:44:29,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:44:29,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:44:29,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:44:29,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29" (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 [2020-08-22 19:44:29,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:44:29,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:44:29,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:44:29,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:44:29,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:44:29,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:44:29,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:44:29,453 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:44:29,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:44:29,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:44:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:44:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:44:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:44:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:44:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:44:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:44:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:44:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:44:29,803 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:44:29,804 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:44:29,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:29 BoogieIcfgContainer [2020-08-22 19:44:29,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:44:29,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:44:29,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:44:29,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:44:29,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:44:28" (1/3) ... [2020-08-22 19:44:29,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208ceae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:29, skipping insertion in model container [2020-08-22 19:44:29,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:29" (2/3) ... [2020-08-22 19:44:29,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208ceae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:29, skipping insertion in model container [2020-08-22 19:44:29,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:29" (3/3) ... [2020-08-22 19:44:29,819 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2020-08-22 19:44:29,830 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:44:29,841 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:44:29,854 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:44:29,877 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:44:29,877 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:44:29,877 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:44:29,878 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:44:29,878 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:44:29,878 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:44:29,878 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:44:29,878 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:44:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-08-22 19:44:29,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 19:44:29,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:29,909 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] [2020-08-22 19:44:29,909 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:29,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1558850377, now seen corresponding path program 1 times [2020-08-22 19:44:29,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:29,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117886696] [2020-08-22 19:44:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:29,979 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:30,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:30,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 19:44:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:30,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117886696] [2020-08-22 19:44:30,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:30,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:44:30,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838993276] [2020-08-22 19:44:30,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:44:30,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:44:30,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:44:30,218 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 3 states. [2020-08-22 19:44:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:30,512 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-08-22 19:44:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:44:30,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-08-22 19:44:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:30,528 INFO L225 Difference]: With dead ends: 109 [2020-08-22 19:44:30,528 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 19:44:30,535 INFO L675 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 [2020-08-22 19:44:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 19:44:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-22 19:44:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 19:44:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-08-22 19:44:30,584 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 35 [2020-08-22 19:44:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:30,585 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-08-22 19:44:30,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:44:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-08-22 19:44:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 19:44:30,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:30,587 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] [2020-08-22 19:44:30,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:44:30,588 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash -574468364, now seen corresponding path program 1 times [2020-08-22 19:44:30,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:30,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957178874] [2020-08-22 19:44:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:30,593 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:30,620 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-22 19:44:30,620 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:44:30,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:44:30,646 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-22 19:44:30,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:44:30 BoogieIcfgContainer [2020-08-22 19:44:30,647 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:44:30,650 INFO L168 Benchmark]: Toolchain (without parser) took 1681.28 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 104.6 MB in the beginning and 121.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:30,651 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-22 19:44:30,652 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.96 ms. Allocated memory is still 140.5 MB. Free memory was 104.6 MB in the beginning and 93.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:30,653 INFO L168 Benchmark]: Boogie Preprocessor took 129.43 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 180.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:30,654 INFO L168 Benchmark]: RCFGBuilder took 430.15 ms. Allocated memory is still 203.4 MB. Free memory was 180.5 MB in the beginning and 162.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:30,655 INFO L168 Benchmark]: TraceAbstraction took 836.16 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 121.8 MB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:30,660 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.96 ms. Allocated memory is still 140.5 MB. Free memory was 104.6 MB in the beginning and 93.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.43 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 180.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.15 ms. Allocated memory is still 203.4 MB. Free memory was 180.5 MB in the beginning and 162.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 836.16 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 121.8 MB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: 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: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] a[0] = 8 [L30] b[0] = 1 [L32] i=1 [L32] COND FALSE !(i