/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_trans.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:20:12,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:20:12,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:20:12,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:20:12,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:20:12,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:20:12,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:20:12,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:20:12,319 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:20:12,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:20:12,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:20:12,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:20:12,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:20:12,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:20:12,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:20:12,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:20:12,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:20:12,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:20:12,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:20:12,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:20:12,321 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:20:12,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:20:12,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:20:12,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:20:12,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:20:12,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:20:12,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:20:12,323 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:20:12,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:20:12,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:20:12,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:20:12,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:20:12,719 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:20:12,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_trans.i [2021-02-24 00:20:12,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0911dd8/5634b115a2a44dd7b368a8796db0906e/FLAG09e97e696 [2021-02-24 00:20:13,382 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:20:13,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_trans.i [2021-02-24 00:20:13,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0911dd8/5634b115a2a44dd7b368a8796db0906e/FLAG09e97e696 [2021-02-24 00:20:13,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0911dd8/5634b115a2a44dd7b368a8796db0906e [2021-02-24 00:20:13,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:20:13,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:20:13,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:20:13,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:20:13,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:20:13,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:20:13" (1/1) ... [2021-02-24 00:20:13,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f874113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:13, skipping insertion in model container [2021-02-24 00:20:13,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:20:13" (1/1) ... [2021-02-24 00:20:13,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:20:13,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:20:14,035 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-invgen/id_trans.i[893,906] [2021-02-24 00:20:14,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:20:14,061 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:20:14,076 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-invgen/id_trans.i[893,906] [2021-02-24 00:20:14,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:20:14,097 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:20:14,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14 WrapperNode [2021-02-24 00:20:14,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:20:14,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:20:14,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:20:14,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:20:14,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14" (1/1) ... [2021-02-24 00:20:14,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14" (1/1) ... [2021-02-24 00:20:14,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14" (1/1) ... [2021-02-24 00:20:14,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14" (1/1) ... [2021-02-24 00:20:14,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14" (1/1) ... [2021-02-24 00:20:14,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14" (1/1) ... [2021-02-24 00:20:14,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14" (1/1) ... [2021-02-24 00:20:14,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:20:14,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:20:14,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:20:14,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:20:14,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14" (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 [2021-02-24 00:20:14,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:20:14,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:20:14,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:20:14,238 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:20:14,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:20:14,239 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:20:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:20:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:20:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 00:20:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 00:20:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:20:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:20:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:20:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:20:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:20:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:20:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:20:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:20:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:20:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:20:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:20:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:20:14,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:20:14,727 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:20:14,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:20:14 BoogieIcfgContainer [2021-02-24 00:20:14,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:20:14,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:20:14,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:20:14,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:20:14,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:20:13" (1/3) ... [2021-02-24 00:20:14,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ece2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:20:14, skipping insertion in model container [2021-02-24 00:20:14,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:14" (2/3) ... [2021-02-24 00:20:14,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ece2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:20:14, skipping insertion in model container [2021-02-24 00:20:14,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:20:14" (3/3) ... [2021-02-24 00:20:14,741 INFO L111 eAbstractionObserver]: Analyzing ICFG id_trans.i [2021-02-24 00:20:14,749 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:20:14,753 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:20:14,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:20:14,796 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:20:14,796 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:20:14,796 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:20:14,796 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:20:14,797 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:20:14,797 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:20:14,797 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:20:14,797 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:20:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2021-02-24 00:20:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 00:20:14,824 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:20:14,825 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] [2021-02-24 00:20:14,825 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:20:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:20:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash -318723043, now seen corresponding path program 1 times [2021-02-24 00:20:14,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:20:14,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580952132] [2021-02-24 00:20:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:20:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:20:15,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:20:15,125 WARN L141 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-02-24 00:20:15,126 WARN L147 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size 3 [2021-02-24 00:20:15,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:20:15,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:20:15,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:20:15,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:20:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:20:15,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:20:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:20:15,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580952132] [2021-02-24 00:20:15,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:20:15,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:20:15,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837917920] [2021-02-24 00:20:15,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:20:15,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:20:15,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:20:15,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:20:15,273 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2021-02-24 00:20:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:20:15,685 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2021-02-24 00:20:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:20:15,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2021-02-24 00:20:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:20:15,698 INFO L225 Difference]: With dead ends: 81 [2021-02-24 00:20:15,698 INFO L226 Difference]: Without dead ends: 52 [2021-02-24 00:20:15,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:20:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-24 00:20:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-02-24 00:20:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-24 00:20:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-02-24 00:20:15,767 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 32 [2021-02-24 00:20:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:20:15,768 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-02-24 00:20:15,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:20:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-02-24 00:20:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-24 00:20:15,771 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:20:15,771 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2021-02-24 00:20:15,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:20:15,772 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:20:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:20:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash 845329194, now seen corresponding path program 1 times [2021-02-24 00:20:15,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:20:15,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179882474] [2021-02-24 00:20:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:20:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:20:15,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:20:15,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:20:15,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:20:15,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:20:15,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:20:15,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:20:15,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:20:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:20:15,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:20:15,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 00:20:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:20:15,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:20:15,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:20:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:20:15,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179882474] [2021-02-24 00:20:15,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:20:15,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:20:15,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17948152] [2021-02-24 00:20:15,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:20:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:20:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:20:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:20:15,924 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 6 states. [2021-02-24 00:20:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:20:16,266 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-02-24 00:20:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:20:16,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2021-02-24 00:20:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:20:16,276 INFO L225 Difference]: With dead ends: 55 [2021-02-24 00:20:16,276 INFO L226 Difference]: Without dead ends: 53 [2021-02-24 00:20:16,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:20:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-24 00:20:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-02-24 00:20:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-24 00:20:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-02-24 00:20:16,324 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 37 [2021-02-24 00:20:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:20:16,325 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-02-24 00:20:16,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:20:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-02-24 00:20:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-24 00:20:16,331 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:20:16,331 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-02-24 00:20:16,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:20:16,332 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:20:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:20:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1460950730, now seen corresponding path program 1 times [2021-02-24 00:20:16,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:20:16,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996716326] [2021-02-24 00:20:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:20:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:20:16,405 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:20:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:20:16,433 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:20:16,466 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:20:16,466 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:20:16,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:20:16,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:20:16 BoogieIcfgContainer [2021-02-24 00:20:16,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:20:16,513 INFO L168 Benchmark]: Toolchain (without parser) took 2742.86 ms. Allocated memory was 164.6 MB in the beginning and 203.4 MB in the end (delta: 38.8 MB). Free memory was 141.8 MB in the beginning and 142.2 MB in the end (delta: -333.9 kB). Peak memory consumption was 39.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:20:16,515 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 164.6 MB. Free memory is still 138.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:20:16,517 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.84 ms. Allocated memory is still 164.6 MB. Free memory was 140.7 MB in the beginning and 131.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:20:16,519 INFO L168 Benchmark]: Boogie Preprocessor took 37.25 ms. Allocated memory is still 164.6 MB. Free memory was 131.0 MB in the beginning and 129.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:20:16,523 INFO L168 Benchmark]: RCFGBuilder took 593.48 ms. Allocated memory is still 164.6 MB. Free memory was 129.5 MB in the beginning and 146.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:20:16,524 INFO L168 Benchmark]: TraceAbstraction took 1778.31 ms. Allocated memory was 164.6 MB in the beginning and 203.4 MB in the end (delta: 38.8 MB). Free memory was 145.6 MB in the beginning and 142.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 43.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:20:16,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 164.6 MB. Free memory is still 138.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 308.84 ms. Allocated memory is still 164.6 MB. Free memory was 140.7 MB in the beginning and 131.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.25 ms. Allocated memory is still 164.6 MB. Free memory was 131.0 MB in the beginning and 129.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 593.48 ms. Allocated memory is still 164.6 MB. Free memory was 129.5 MB in the beginning and 146.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1778.31 ms. Allocated memory was 164.6 MB in the beginning and 203.4 MB in the end (delta: 38.8 MB). Free memory was 145.6 MB in the beginning and 142.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 43.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int idBitLength, material_length, nlen; [L26] int j, k; [L27] nlen = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, nlen=0] [L28] idBitLength = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=9, idBitLength=9, nlen=0] [L29] material_length = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, idBitLength=9, material_length=1, nlen=0] [L30] COND FALSE !(!( nlen == idBitLength / 32 )) VAL [idBitLength=9, material_length=1, nlen=0] [L31] j = 0 VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L31] COND TRUE (j < idBitLength / 8) && (j < material_length) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L32] CALL __VERIFIER_assert( 0 <= j) VAL [\old(cond)=1] [L18] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L32] RET __VERIFIER_assert( 0 <= j) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L33] CALL __VERIFIER_assert( j < material_length ) VAL [\old(cond)=1] [L18] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L33] RET __VERIFIER_assert( j < material_length ) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L34] CALL __VERIFIER_assert( 0 <= j/4 ) VAL [\old(cond)=1] [L18] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L34] RET __VERIFIER_assert( 0 <= j/4 ) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L35] CALL __VERIFIER_assert( j/4 < nlen) VAL [\old(cond)=0] [L18] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 58 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 78 SDslu, 98 SDs, 0 SdLazy, 232 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 67 ConstructedInterpolants, 0 QuantifiedInterpolants, 4535 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, 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...