/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/array-fpi/s2liff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:22,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:22,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:22,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:22,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:22,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:22,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:22,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:22,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:22,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:22,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:22,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:22,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:22,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:22,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:22,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:22,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:22,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:22,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:22,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:22,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:20:22,565 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:22,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:22,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:22,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:22,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:22,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:22,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:22,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:22,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:22,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:22,573 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:22,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:22,574 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:22,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:22,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:22,575 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:22,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:22,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:22,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:22,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:22,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:22,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:22,576 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:22,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:23,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:23,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:23,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:23,047 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:23,047 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:23,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2liff.c [2021-02-22 02:20:23,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ab932436/e5c91237491a4e62abd0bd8c12b07337/FLAGfe0af170c [2021-02-22 02:20:23,815 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:23,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2liff.c [2021-02-22 02:20:23,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ab932436/e5c91237491a4e62abd0bd8c12b07337/FLAGfe0af170c [2021-02-22 02:20:24,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ab932436/e5c91237491a4e62abd0bd8c12b07337 [2021-02-22 02:20:24,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:24,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:24,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:24,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:24,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:24,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:24" (1/1) ... [2021-02-22 02:20:24,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d06d980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24, skipping insertion in model container [2021-02-22 02:20:24,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:24" (1/1) ... [2021-02-22 02:20:24,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:24,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:24,376 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2liff.c[589,602] [2021-02-22 02:20:24,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:24,411 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:24,426 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2liff.c[589,602] [2021-02-22 02:20:24,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:24,456 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:24,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24 WrapperNode [2021-02-22 02:20:24,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:24,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:24,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:24,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:24,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24" (1/1) ... [2021-02-22 02:20:24,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24" (1/1) ... [2021-02-22 02:20:24,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24" (1/1) ... [2021-02-22 02:20:24,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24" (1/1) ... [2021-02-22 02:20:24,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24" (1/1) ... [2021-02-22 02:20:24,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24" (1/1) ... [2021-02-22 02:20:24,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24" (1/1) ... [2021-02-22 02:20:24,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:24,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:24,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:24,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:24,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24" (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 [2021-02-22 02:20:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:20:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:20:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:20:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:20:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:20:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:24,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:24,996 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-22 02:20:24,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:24 BoogieIcfgContainer [2021-02-22 02:20:24,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:25,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:25,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:25,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:25,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:24" (1/3) ... [2021-02-22 02:20:25,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fce384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:25, skipping insertion in model container [2021-02-22 02:20:25,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:24" (2/3) ... [2021-02-22 02:20:25,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fce384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:25, skipping insertion in model container [2021-02-22 02:20:25,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:24" (3/3) ... [2021-02-22 02:20:25,021 INFO L111 eAbstractionObserver]: Analyzing ICFG s2liff.c [2021-02-22 02:20:25,034 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:25,040 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:25,072 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:25,115 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:25,116 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:25,116 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:25,116 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:25,117 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:25,117 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:25,117 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:25,117 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2021-02-22 02:20:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-22 02:20:25,178 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:25,180 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] [2021-02-22 02:20:25,180 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash -276473570, now seen corresponding path program 1 times [2021-02-22 02:20:25,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:25,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876859903] [2021-02-22 02:20:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:25,303 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:25,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:25,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:25,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:25,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:25,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:25,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876859903] [2021-02-22 02:20:25,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:25,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:25,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159513940] [2021-02-22 02:20:25,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:25,729 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 3 states. [2021-02-22 02:20:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:25,915 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2021-02-22 02:20:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:25,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2021-02-22 02:20:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:25,926 INFO L225 Difference]: With dead ends: 131 [2021-02-22 02:20:25,926 INFO L226 Difference]: Without dead ends: 64 [2021-02-22 02:20:25,930 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 [2021-02-22 02:20:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-22 02:20:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-02-22 02:20:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-22 02:20:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-02-22 02:20:25,985 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 38 [2021-02-22 02:20:25,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:25,986 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-02-22 02:20:25,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-02-22 02:20:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-22 02:20:25,988 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:25,988 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] [2021-02-22 02:20:25,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:25,989 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1119969012, now seen corresponding path program 1 times [2021-02-22 02:20:25,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:25,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089974193] [2021-02-22 02:20:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:25,995 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:26,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:26,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:26,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:26,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:26,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:26,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:26,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:26,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:26,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089974193] [2021-02-22 02:20:26,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:26,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:20:26,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620825076] [2021-02-22 02:20:26,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:20:26,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:26,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:20:26,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:20:26,170 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 5 states. [2021-02-22 02:20:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:26,440 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-02-22 02:20:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:20:26,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2021-02-22 02:20:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:26,447 INFO L225 Difference]: With dead ends: 120 [2021-02-22 02:20:26,448 INFO L226 Difference]: Without dead ends: 89 [2021-02-22 02:20:26,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:20:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-22 02:20:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2021-02-22 02:20:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-22 02:20:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-02-22 02:20:26,490 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 38 [2021-02-22 02:20:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:26,491 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-02-22 02:20:26,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:20:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-02-22 02:20:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-22 02:20:26,499 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:26,499 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] [2021-02-22 02:20:26,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:26,499 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:26,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1778519661, now seen corresponding path program 1 times [2021-02-22 02:20:26,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:26,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168327712] [2021-02-22 02:20:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:26,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:26,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:26,562 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:20:26,577 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:20:26,583 WARN L141 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size [2021-02-22 02:20:26,586 WARN L147 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size 30 [2021-02-22 02:20:26,587 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:20:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:20:26,722 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:20:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:20:26,781 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:20:26,816 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:20:26,817 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:20:26,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:20:26,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:20:26 BoogieIcfgContainer [2021-02-22 02:20:26,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:20:26,838 INFO L168 Benchmark]: Toolchain (without parser) took 2684.30 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 105.9 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:26,839 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 133.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:26,840 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.52 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:26,841 INFO L168 Benchmark]: Boogie Preprocessor took 43.82 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 114.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:26,841 INFO L168 Benchmark]: RCFGBuilder took 495.58 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 132.5 MB in the end (delta: -17.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:26,842 INFO L168 Benchmark]: TraceAbstraction took 1833.65 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 105.9 MB in the end (delta: 26.1 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:26,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 133.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.52 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.82 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 114.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 495.58 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 132.5 MB in the end (delta: -17.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1833.65 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 105.9 MB in the end (delta: 26.1 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a 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] = N [L32] i=0 [L32] COND TRUE i