/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/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:37,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:37,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:37,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:37,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:37,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:37,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:37,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:37,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:37,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:37,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:37,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:37,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:37,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:37,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:37,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:37,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:37,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:37,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:37,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:37,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:37,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:37,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:37,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:37,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:37,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:37,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:37,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:37,538 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 06:34:37,550 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:37,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:37,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:37,553 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:37,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:37,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:37,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:37,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:37,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:37,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:37,554 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:37,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:37,554 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:37,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:37,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:37,555 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:37,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:37,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:37,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:37,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:37,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:37,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:37,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:37,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:37,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:37,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:37,953 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:37,954 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:37,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-11-07 06:34:38,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a16667214/ccc872584b1f4434a1f3a1d2fe652283/FLAG443f5e964 [2020-11-07 06:34:38,653 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:38,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2020-11-07 06:34:38,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a16667214/ccc872584b1f4434a1f3a1d2fe652283/FLAG443f5e964 [2020-11-07 06:34:39,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a16667214/ccc872584b1f4434a1f3a1d2fe652283 [2020-11-07 06:34:39,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:39,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:39,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:39,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:39,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:39,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:39" (1/1) ... [2020-11-07 06:34:39,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@664bdf2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39, skipping insertion in model container [2020-11-07 06:34:39,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:39" (1/1) ... [2020-11-07 06:34:39,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:39,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:39,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:39,245 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:39,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:39,291 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:39,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39 WrapperNode [2020-11-07 06:34:39,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:39,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:39,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:39,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:39,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39" (1/1) ... [2020-11-07 06:34:39,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39" (1/1) ... [2020-11-07 06:34:39,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39" (1/1) ... [2020-11-07 06:34:39,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39" (1/1) ... [2020-11-07 06:34:39,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39" (1/1) ... [2020-11-07 06:34:39,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39" (1/1) ... [2020-11-07 06:34:39,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39" (1/1) ... [2020-11-07 06:34:39,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:39,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:39,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:39,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:39,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39" (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 06:34:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:39,458 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:34:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:34:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:34:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:39,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:39,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:39,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:40,207 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:40,208 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 06:34:40,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:40 BoogieIcfgContainer [2020-11-07 06:34:40,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:40,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:40,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:40,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:40,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:39" (1/3) ... [2020-11-07 06:34:40,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58065ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:40, skipping insertion in model container [2020-11-07 06:34:40,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:39" (2/3) ... [2020-11-07 06:34:40,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58065ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:40, skipping insertion in model container [2020-11-07 06:34:40,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:40" (3/3) ... [2020-11-07 06:34:40,220 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-11-07 06:34:40,237 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:40,240 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:40,251 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:40,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:40,272 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:40,272 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:40,272 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:40,273 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:40,273 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:40,273 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:40,273 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-11-07 06:34:40,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 06:34:40,299 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:40,300 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 06:34:40,301 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:40,307 INFO L82 PathProgramCache]: Analyzing trace with hash -109308390, now seen corresponding path program 1 times [2020-11-07 06:34:40,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:40,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110057877] [2020-11-07 06:34:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:40,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:40,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:40,712 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 06:34:40,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110057877] [2020-11-07 06:34:40,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:40,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:40,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893817197] [2020-11-07 06:34:40,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:40,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:40,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:40,738 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 5 states. [2020-11-07 06:34:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:41,142 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2020-11-07 06:34:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:34:41,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-11-07 06:34:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:41,155 INFO L225 Difference]: With dead ends: 148 [2020-11-07 06:34:41,155 INFO L226 Difference]: Without dead ends: 80 [2020-11-07 06:34:41,160 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 06:34:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-07 06:34:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2020-11-07 06:34:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 06:34:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-11-07 06:34:41,221 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 37 [2020-11-07 06:34:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:41,222 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-11-07 06:34:41,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:41,222 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-11-07 06:34:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 06:34:41,225 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:41,225 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 06:34:41,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:41,226 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:41,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1788289630, now seen corresponding path program 1 times [2020-11-07 06:34:41,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:41,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954128718] [2020-11-07 06:34:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:42,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:42,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:42,091 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 06:34:42,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954128718] [2020-11-07 06:34:42,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:42,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:34:42,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956733059] [2020-11-07 06:34:42,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:34:42,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:42,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:34:42,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:34:42,097 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 20 states. [2020-11-07 06:34:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:43,628 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-11-07 06:34:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:34:43,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-11-07 06:34:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:43,633 INFO L225 Difference]: With dead ends: 114 [2020-11-07 06:34:43,633 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 06:34:43,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:34:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 06:34:43,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2020-11-07 06:34:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 06:34:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-11-07 06:34:43,670 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 54 [2020-11-07 06:34:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:43,671 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-11-07 06:34:43,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:34:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-11-07 06:34:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 06:34:43,676 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:43,676 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 06:34:43,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:43,677 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:43,677 INFO L82 PathProgramCache]: Analyzing trace with hash 856266086, now seen corresponding path program 1 times [2020-11-07 06:34:43,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:43,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839755341] [2020-11-07 06:34:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:43,732 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-07 06:34:43,733 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-11-07 06:34:43,733 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:34:43,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:43,765 WARN L253 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-07 06:34:43,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:34:43 BoogieIcfgContainer [2020-11-07 06:34:43,767 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:34:43,774 INFO L168 Benchmark]: Toolchain (without parser) took 4750.50 ms. Allocated memory was 159.4 MB in the beginning and 200.3 MB in the end (delta: 40.9 MB). Free memory was 135.5 MB in the beginning and 172.9 MB in the end (delta: -37.4 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:43,777 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 159.4 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:34:43,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.12 ms. Allocated memory is still 159.4 MB. Free memory was 134.9 MB in the beginning and 125.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:43,784 INFO L168 Benchmark]: Boogie Preprocessor took 49.01 ms. Allocated memory is still 159.4 MB. Free memory was 125.2 MB in the beginning and 123.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:43,785 INFO L168 Benchmark]: RCFGBuilder took 867.16 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 137.6 MB in the end (delta: -14.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:43,786 INFO L168 Benchmark]: TraceAbstraction took 3554.51 ms. Allocated memory was 159.4 MB in the beginning and 200.3 MB in the end (delta: 40.9 MB). Free memory was 137.1 MB in the beginning and 172.9 MB in the end (delta: -35.8 MB). Peak memory consumption was 5.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:43,791 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 159.4 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.12 ms. Allocated memory is still 159.4 MB. Free memory was 134.9 MB in the beginning and 125.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.01 ms. Allocated memory is still 159.4 MB. Free memory was 125.2 MB in the beginning and 123.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 867.16 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 137.6 MB in the end (delta: -14.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3554.51 ms. Allocated memory was 159.4 MB in the beginning and 200.3 MB in the end (delta: 40.9 MB). Free memory was 137.1 MB in the beginning and 172.9 MB in the end (delta: -35.8 MB). Peak memory consumption was 5.1 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 sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 [L32] COND TRUE i