/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/res2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:34,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:34,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:34,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:34,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:34,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:34,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:34,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:34,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:34,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:34,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:34,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:34,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:34,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:34,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:34,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:34,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:34,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:34,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:34,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:34,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:34,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:34,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:34,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:34,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:34,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:34,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:34,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:34,926 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 06:34:34,938 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:34,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:34,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:34,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:34,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:34,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:34,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:34,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:34,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:34,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:34,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:34,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:34,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:34,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:34,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:34,944 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:34,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:34,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:34,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:34,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:34,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:34,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:34,946 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:35,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:35,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:35,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:35,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:35,374 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:35,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2f.c [2020-11-07 06:34:35,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3094cfd4/e208bc8e859d435780fd276f65b8517c/FLAG12ceea4b0 [2020-11-07 06:34:36,072 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:36,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2f.c [2020-11-07 06:34:36,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3094cfd4/e208bc8e859d435780fd276f65b8517c/FLAG12ceea4b0 [2020-11-07 06:34:36,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3094cfd4/e208bc8e859d435780fd276f65b8517c [2020-11-07 06:34:36,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:36,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:36,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:36,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:36,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:36,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:36" (1/1) ... [2020-11-07 06:34:36,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e9933b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36, skipping insertion in model container [2020-11-07 06:34:36,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:36" (1/1) ... [2020-11-07 06:34:36,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:36,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:36,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:36,635 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:36,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:36,681 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:36,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36 WrapperNode [2020-11-07 06:34:36,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:36,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:36,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:36,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:36,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36" (1/1) ... [2020-11-07 06:34:36,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36" (1/1) ... [2020-11-07 06:34:36,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36" (1/1) ... [2020-11-07 06:34:36,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36" (1/1) ... [2020-11-07 06:34:36,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36" (1/1) ... [2020-11-07 06:34:36,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36" (1/1) ... [2020-11-07 06:34:36,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36" (1/1) ... [2020-11-07 06:34:36,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:36,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:36,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:36,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:36,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36" (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 06:34:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:34:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:34:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:34:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:37,411 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:37,412 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-07 06:34:37,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:37 BoogieIcfgContainer [2020-11-07 06:34:37,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:37,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:37,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:37,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:37,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:36" (1/3) ... [2020-11-07 06:34:37,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56579cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:37, skipping insertion in model container [2020-11-07 06:34:37,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:36" (2/3) ... [2020-11-07 06:34:37,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56579cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:37, skipping insertion in model container [2020-11-07 06:34:37,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:37" (3/3) ... [2020-11-07 06:34:37,423 INFO L111 eAbstractionObserver]: Analyzing ICFG res2f.c [2020-11-07 06:34:37,441 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:37,445 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:37,459 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:37,485 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:37,485 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:37,485 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:37,486 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:37,486 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:37,486 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:37,486 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:37,486 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2020-11-07 06:34:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 06:34:37,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:37,518 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] [2020-11-07 06:34:37,519 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1561685199, now seen corresponding path program 1 times [2020-11-07 06:34:37,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:37,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863496589] [2020-11-07 06:34:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:37,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:37,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:37,952 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 06:34:37,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863496589] [2020-11-07 06:34:37,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:37,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:34:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913952688] [2020-11-07 06:34:37,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:34:37,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:37,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:34:37,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:37,985 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 3 states. [2020-11-07 06:34:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:38,331 INFO L93 Difference]: Finished difference Result 177 states and 205 transitions. [2020-11-07 06:34:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:34:38,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-11-07 06:34:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:38,343 INFO L225 Difference]: With dead ends: 177 [2020-11-07 06:34:38,343 INFO L226 Difference]: Without dead ends: 86 [2020-11-07 06:34:38,348 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 06:34:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-07 06:34:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-11-07 06:34:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-07 06:34:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-11-07 06:34:38,405 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 49 [2020-11-07 06:34:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:38,406 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-11-07 06:34:38,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:34:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-11-07 06:34:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 06:34:38,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:38,409 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] [2020-11-07 06:34:38,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:38,410 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash 546168718, now seen corresponding path program 1 times [2020-11-07 06:34:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:38,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925552825] [2020-11-07 06:34:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:38,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:38,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:38,597 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 06:34:38,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925552825] [2020-11-07 06:34:38,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:38,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:38,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435665567] [2020-11-07 06:34:38,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:38,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:38,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:38,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:38,605 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 5 states. [2020-11-07 06:34:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:38,934 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2020-11-07 06:34:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:34:38,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-11-07 06:34:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:38,936 INFO L225 Difference]: With dead ends: 171 [2020-11-07 06:34:38,937 INFO L226 Difference]: Without dead ends: 122 [2020-11-07 06:34:38,938 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 06:34:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-07 06:34:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2020-11-07 06:34:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-07 06:34:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-11-07 06:34:38,956 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 49 [2020-11-07 06:34:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:38,957 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-11-07 06:34:38,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-11-07 06:34:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 06:34:38,960 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:38,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:34:38,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:38,961 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:38,961 INFO L82 PathProgramCache]: Analyzing trace with hash 399755127, now seen corresponding path program 1 times [2020-11-07 06:34:38,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:38,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120651557] [2020-11-07 06:34:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:39,110 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:39,187 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:39,235 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:34:39,235 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:34:39,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:39,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:34:39 BoogieIcfgContainer [2020-11-07 06:34:39,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:34:39,356 INFO L168 Benchmark]: Toolchain (without parser) took 2965.67 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 82.1 MB in the end (delta: 45.5 MB). Peak memory consumption was 46.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:39,358 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:34:39,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 116.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:39,361 INFO L168 Benchmark]: Boogie Preprocessor took 47.79 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 114.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:39,362 INFO L168 Benchmark]: RCFGBuilder took 681.73 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 123.1 MB in the end (delta: -8.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:39,366 INFO L168 Benchmark]: TraceAbstraction took 1937.02 ms. Allocated memory is still 151.0 MB. Free memory was 122.6 MB in the beginning and 82.1 MB in the end (delta: 40.5 MB). Peak memory consumption was 41.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:39,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 116.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.79 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 114.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 681.73 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 123.1 MB in the end (delta: -8.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1937.02 ms. Allocated memory is still 151.0 MB. Free memory was 122.6 MB in the beginning and 82.1 MB in the end (delta: 40.5 MB). Peak memory consumption was 41.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; VAL [\old(N)=0, N=1] [L28] long long sum[1]; VAL [\old(N)=0, N=1, sum={9:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-2:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={9:0}] [L30] int *b = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-2:0}, b={-3:0}, malloc(sizeof(int)*N)={-3:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={9:0}] [L31] int *c = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-2:0}, b={-3:0}, c={7:0}, malloc(sizeof(int)*N)={7:0}, malloc(sizeof(int)*N)={-3:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={9:0}] [L33] sum[0] = 1 VAL [\old(N)=0, a={-2:0}, b={-3:0}, c={7:0}, malloc(sizeof(int)*N)={7:0}, malloc(sizeof(int)*N)={-3:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={9:0}] [L34] i=0 VAL [\old(N)=0, a={-2:0}, b={-3:0}, c={7:0}, i=0, malloc(sizeof(int)*N)={7:0}, malloc(sizeof(int)*N)={-3:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={9:0}] [L34] COND TRUE i