/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark11_linear.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 07:57:45,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 07:57:45,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 07:57:45,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 07:57:45,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 07:57:45,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 07:57:45,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 07:57:45,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 07:57:45,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 07:57:45,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 07:57:45,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 07:57:45,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 07:57:45,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 07:57:45,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 07:57:45,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 07:57:45,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 07:57:45,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 07:57:45,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 07:57:45,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 07:57:45,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 07:57:45,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 07:57:45,371 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 07:57:45,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 07:57:45,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 07:57:45,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 07:57:45,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 07:57:45,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 07:57:45,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 07:57:45,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 07:57:45,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 07:57:45,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 07:57:45,373 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 07:57:45,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 07:57:45,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 07:57:45,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 07:57:45,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 07:57:45,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 07:57:45,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 07:57:45,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 07:57:45,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 07:57:45,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 07:57:45,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 07:57:45,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 07:57:45,377 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 07:57:45,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 07:57:45,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 07:57:45,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 07:57:45,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 07:57:45,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 07:57:45,703 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 07:57:45,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark11_linear.i [2021-04-16 07:57:45,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b215d33a/9035a89d94b64cdaa4f86bd556950d9f/FLAGd9c656d1b [2021-04-16 07:57:46,200 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 07:57:46,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark11_linear.i [2021-04-16 07:57:46,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b215d33a/9035a89d94b64cdaa4f86bd556950d9f/FLAGd9c656d1b [2021-04-16 07:57:46,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b215d33a/9035a89d94b64cdaa4f86bd556950d9f [2021-04-16 07:57:46,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 07:57:46,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 07:57:46,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 07:57:46,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 07:57:46,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 07:57:46,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:57:46" (1/1) ... [2021-04-16 07:57:46,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c72941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46, skipping insertion in model container [2021-04-16 07:57:46,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:57:46" (1/1) ... [2021-04-16 07:57:46,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 07:57:46,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 07:57:46,728 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark11_linear.i[868,881] [2021-04-16 07:57:46,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:57:46,742 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 07:57:46,752 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark11_linear.i[868,881] [2021-04-16 07:57:46,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:57:46,774 INFO L208 MainTranslator]: Completed translation [2021-04-16 07:57:46,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46 WrapperNode [2021-04-16 07:57:46,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 07:57:46,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 07:57:46,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 07:57:46,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 07:57:46,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46" (1/1) ... [2021-04-16 07:57:46,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46" (1/1) ... [2021-04-16 07:57:46,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46" (1/1) ... [2021-04-16 07:57:46,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46" (1/1) ... [2021-04-16 07:57:46,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46" (1/1) ... [2021-04-16 07:57:46,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46" (1/1) ... [2021-04-16 07:57:46,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46" (1/1) ... [2021-04-16 07:57:46,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 07:57:46,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 07:57:46,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 07:57:46,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 07:57:46,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46" (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 [2021-04-16 07:57:46,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 07:57:46,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 07:57:46,923 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 07:57:46,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 07:57:46,923 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 07:57:46,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 07:57:46,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-04-16 07:57:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-04-16 07:57:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 07:57:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 07:57:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 07:57:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-04-16 07:57:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 07:57:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 07:57:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 07:57:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 07:57:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 07:57:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 07:57:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 07:57:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 07:57:47,179 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 07:57:47,180 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 07:57:47,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:57:47 BoogieIcfgContainer [2021-04-16 07:57:47,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 07:57:47,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 07:57:47,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 07:57:47,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 07:57:47,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 07:57:46" (1/3) ... [2021-04-16 07:57:47,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e524f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:57:47, skipping insertion in model container [2021-04-16 07:57:47,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:57:46" (2/3) ... [2021-04-16 07:57:47,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e524f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:57:47, skipping insertion in model container [2021-04-16 07:57:47,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:57:47" (3/3) ... [2021-04-16 07:57:47,201 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark11_linear.i [2021-04-16 07:57:47,206 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 07:57:47,219 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 07:57:47,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 07:57:47,252 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 07:57:47,252 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 07:57:47,252 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 07:57:47,252 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 07:57:47,252 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 07:57:47,253 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 07:57:47,253 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 07:57:47,253 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 07:57:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:57:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 07:57:47,269 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:57:47,270 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:57:47,270 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:57:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:57:47,275 INFO L82 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2021-04-16 07:57:47,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:57:47,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123748273] [2021-04-16 07:57:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:57:47,336 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:57:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:57:47,456 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:57:47,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-16 07:57:47,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:57:47,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:57:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:57:47,521 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:57:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:57:47,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123748273] [2021-04-16 07:57:47,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:57:47,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-16 07:57:47,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858800933] [2021-04-16 07:57:47,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-16 07:57:47,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:57:47,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-16 07:57:47,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-16 07:57:47,542 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:57:47,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:57:47,648 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-04-16 07:57:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-16 07:57:47,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-16 07:57:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:57:47,655 INFO L225 Difference]: With dead ends: 33 [2021-04-16 07:57:47,655 INFO L226 Difference]: Without dead ends: 14 [2021-04-16 07:57:47,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-16 07:57:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-04-16 07:57:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-04-16 07:57:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:57:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-04-16 07:57:47,687 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-04-16 07:57:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:57:47,688 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-04-16 07:57:47,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:57:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-04-16 07:57:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-16 07:57:47,689 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:57:47,689 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:57:47,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 07:57:47,689 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:57:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:57:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2021-04-16 07:57:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:57:47,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788743794] [2021-04-16 07:57:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:57:47,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:57:47,722 INFO L175 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_10 v_main_~n~0_8) InVars {main_~x~0=v_main_~x~0_10, main_~n~0=v_main_~n~0_8} OutVars{main_~x~0=v_main_~x~0_10, main_~n~0=v_main_~n~0_8} AuxVars[] AssignedVars[] [2021-04-16 07:57:47,730 WARN L240 tifierPushTermWalker]: treesize reduction 10, result has 82.5 percent of original size [2021-04-16 07:57:47,736 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,740 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,743 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,747 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,749 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,761 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:57:47,764 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,765 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-04-16 07:57:47,769 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,772 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:57:47,775 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,778 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,779 WARN L245 tifierPushTermWalker]: treesize reduction 10, result has 82.5 percent of original size 39 [2021-04-16 07:57:47,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:57:47,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-04-16 07:57:47,798 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-04-16 07:57:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 07:57:47,819 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 07:57:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 07:57:47,838 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 07:57:47,867 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-04-16 07:57:47,867 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 07:57:47,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 07:57:47,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 07:57:47 BoogieIcfgContainer [2021-04-16 07:57:47,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 07:57:47,882 INFO L168 Benchmark]: Toolchain (without parser) took 1274.06 ms. Allocated memory is still 205.5 MB. Free memory was 171.7 MB in the beginning and 126.5 MB in the end (delta: 45.2 MB). Peak memory consumption was 45.4 MB. Max. memory is 8.0 GB. [2021-04-16 07:57:47,883 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 205.5 MB. Free memory was 188.7 MB in the beginning and 188.5 MB in the end (delta: 113.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 07:57:47,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.97 ms. Allocated memory is still 205.5 MB. Free memory was 171.5 MB in the beginning and 190.0 MB in the end (delta: -18.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-04-16 07:57:47,884 INFO L168 Benchmark]: Boogie Preprocessor took 48.43 ms. Allocated memory is still 205.5 MB. Free memory was 190.0 MB in the beginning and 188.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-04-16 07:57:47,886 INFO L168 Benchmark]: RCFGBuilder took 337.08 ms. Allocated memory is still 205.5 MB. Free memory was 188.3 MB in the beginning and 175.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-04-16 07:57:47,886 INFO L168 Benchmark]: TraceAbstraction took 684.77 ms. Allocated memory is still 205.5 MB. Free memory was 174.7 MB in the beginning and 126.5 MB in the end (delta: 48.2 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2021-04-16 07:57:47,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 205.5 MB. Free memory was 188.7 MB in the beginning and 188.5 MB in the end (delta: 113.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 183.97 ms. Allocated memory is still 205.5 MB. Free memory was 171.5 MB in the beginning and 190.0 MB in the end (delta: -18.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.43 ms. Allocated memory is still 205.5 MB. Free memory was 190.0 MB in the beginning and 188.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 337.08 ms. Allocated memory is still 205.5 MB. Free memory was 188.3 MB in the beginning and 175.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 684.77 ms. Allocated memory is still 205.5 MB. Free memory was 174.7 MB in the beginning and 126.5 MB in the end (delta: 48.2 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int x = __VERIFIER_nondet_int(); [L21] int n = __VERIFIER_nondet_int(); [L22] COND FALSE !(!(x==0 && n>0)) [L23] COND TRUE x