/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:29:07,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:29:07,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:29:07,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:29:07,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:29:07,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:29:07,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:29:07,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:29:07,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:29:07,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:29:07,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:29:07,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:29:07,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:29:07,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:29:07,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:29:07,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:29:07,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:29:07,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:29:07,748 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:29:07,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:29:07,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:29:07,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:29:07,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:29:07,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:29:07,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:29:07,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:29:07,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:29:07,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:29:07,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:29:07,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:29:07,750 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:29:07,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:29:08,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:29:08,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:29:08,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:29:08,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:29:08,126 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:29:08,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2021-05-02 23:29:08,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f785c1e2/d0b2e2173f7347bcbb7b951097290384/FLAGab261019c [2021-05-02 23:29:08,706 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:29:08,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2021-05-02 23:29:08,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f785c1e2/d0b2e2173f7347bcbb7b951097290384/FLAGab261019c [2021-05-02 23:29:09,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f785c1e2/d0b2e2173f7347bcbb7b951097290384 [2021-05-02 23:29:09,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:29:09,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:29:09,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:09,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:29:09,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:29:09,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:09" (1/1) ... [2021-05-02 23:29:09,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a833e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09, skipping insertion in model container [2021-05-02 23:29:09,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:09" (1/1) ... [2021-05-02 23:29:09,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:29:09,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:29:09,315 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-1.c[322,335] [2021-05-02 23:29:09,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:09,341 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:29:09,385 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-1.c[322,335] [2021-05-02 23:29:09,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:09,422 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:29:09,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09 WrapperNode [2021-05-02 23:29:09,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:09,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:29:09,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:29:09,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:29:09,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09" (1/1) ... [2021-05-02 23:29:09,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09" (1/1) ... [2021-05-02 23:29:09,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09" (1/1) ... [2021-05-02 23:29:09,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09" (1/1) ... [2021-05-02 23:29:09,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09" (1/1) ... [2021-05-02 23:29:09,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09" (1/1) ... [2021-05-02 23:29:09,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09" (1/1) ... [2021-05-02 23:29:09,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:29:09,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:29:09,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:29:09,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:29:09,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09" (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 [2021-05-02 23:29:09,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:29:09,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:29:09,525 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:29:09,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:29:09,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:29:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:29:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:29:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:29:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:29:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:29:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:29:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:29:09,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:29:09,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:29:09,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:29:09,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:29:09,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:29:09,787 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:29:09,787 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:29:09,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:09 BoogieIcfgContainer [2021-05-02 23:29:09,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:29:09,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:29:09,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:29:09,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:29:09,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:29:09" (1/3) ... [2021-05-02 23:29:09,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f12c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:09, skipping insertion in model container [2021-05-02 23:29:09,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:09" (2/3) ... [2021-05-02 23:29:09,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f12c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:09, skipping insertion in model container [2021-05-02 23:29:09,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:09" (3/3) ... [2021-05-02 23:29:09,796 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2021-05-02 23:29:09,801 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:29:09,805 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:29:09,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:29:09,839 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:29:09,839 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:29:09,839 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:29:09,840 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:29:09,840 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:29:09,840 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:29:09,840 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:29:09,840 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:29:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-05-02 23:29:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:29:09,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:09,858 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:09,859 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:09,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:09,863 INFO L82 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2021-05-02 23:29:09,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:09,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746554756] [2021-05-02 23:29:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:09,960 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:10,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:10,176 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:10,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746554756] [2021-05-02 23:29:10,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [746554756] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:10,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:10,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:29:10,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962994423] [2021-05-02 23:29:10,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:29:10,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:10,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:29:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:29:10,193 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-02 23:29:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:10,273 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 23:29:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:29:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-02 23:29:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:10,284 INFO L225 Difference]: With dead ends: 29 [2021-05-02 23:29:10,284 INFO L226 Difference]: Without dead ends: 12 [2021-05-02 23:29:10,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:29:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-02 23:29:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-02 23:29:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2021-05-02 23:29:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-02 23:29:10,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-05-02 23:29:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:10,322 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-02 23:29:10,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-02 23:29:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-02 23:29:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:29:10,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:10,323 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:10,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:29:10,324 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:10,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:10,324 INFO L82 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2021-05-02 23:29:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:10,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907015764] [2021-05-02 23:29:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:10,328 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:10,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:10,478 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:10,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907015764] [2021-05-02 23:29:10,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907015764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:10,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:10,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:29:10,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433642138] [2021-05-02 23:29:10,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:29:10,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:29:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:29:10,481 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-05-02 23:29:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:10,576 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 23:29:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:29:10,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-05-02 23:29:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:10,577 INFO L225 Difference]: With dead ends: 18 [2021-05-02 23:29:10,577 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 23:29:10,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:29:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 23:29:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 23:29:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-05-02 23:29:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 23:29:10,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 23:29:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:10,584 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 23:29:10,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-05-02 23:29:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 23:29:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:29:10,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:10,585 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:10,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:29:10,586 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:10,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2021-05-02 23:29:10,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:10,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997574413] [2021-05-02 23:29:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:10,679 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 1 (mod v_main_~x~0_8 4294967296)) InVars {main_~x~0=v_main_~x~0_8} OutVars{main_~x~0=v_main_~x~0_8} AuxVars[] AssignedVars[] [2021-05-02 23:29:10,701 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.5 percent of original size [2021-05-02 23:29:10,733 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:29:10,989 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-02 23:29:11,467 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-02 23:29:11,560 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:29:11,705 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.5 percent of original size 58 [2021-05-02 23:29:11,855 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:29:11,864 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:29:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:29:11,922 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:29:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:29:11,976 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:29:11,998 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:29:11,999 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:29:11,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:29:12,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:29:12 BoogieIcfgContainer [2021-05-02 23:29:12,011 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:29:12,013 INFO L168 Benchmark]: Toolchain (without parser) took 2894.56 ms. Allocated memory was 127.9 MB in the beginning and 186.6 MB in the end (delta: 58.7 MB). Free memory was 92.5 MB in the beginning and 136.9 MB in the end (delta: -44.4 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:12,014 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 127.9 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:29:12,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.29 ms. Allocated memory was 127.9 MB in the beginning and 186.6 MB in the end (delta: 58.7 MB). Free memory was 92.3 MB in the beginning and 170.6 MB in the end (delta: -78.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:12,018 INFO L168 Benchmark]: Boogie Preprocessor took 25.53 ms. Allocated memory is still 186.6 MB. Free memory was 170.6 MB in the beginning and 169.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:12,019 INFO L168 Benchmark]: RCFGBuilder took 339.01 ms. Allocated memory is still 186.6 MB. Free memory was 169.2 MB in the beginning and 156.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:12,019 INFO L168 Benchmark]: TraceAbstraction took 2220.79 ms. Allocated memory is still 186.6 MB. Free memory was 156.3 MB in the beginning and 136.9 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:12,023 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 127.9 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 301.29 ms. Allocated memory was 127.9 MB in the beginning and 186.6 MB in the end (delta: 58.7 MB). Free memory was 92.3 MB in the beginning and 170.6 MB in the end (delta: -78.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.53 ms. Allocated memory is still 186.6 MB. Free memory was 170.6 MB in the beginning and 169.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 339.01 ms. Allocated memory is still 186.6 MB. Free memory was 169.2 MB in the beginning and 156.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2220.79 ms. Allocated memory is still 186.6 MB. Free memory was 156.3 MB in the beginning and 136.9 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0x0ffffff1; [L15] COND TRUE x > 1 [L16] x -= 2 [L15] COND FALSE !(x > 1) [L19] CALL __VERIFIER_assert(!(x % 2)) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2162.9ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 9.9ms, AutomataDifference: 202.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 15 SDslu, 10 SDs, 0 SdLazy, 13 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 185.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...