/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:59:50,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:59:50,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:59:50,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:59:50,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:59:50,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:59:50,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:59:50,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:59:50,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:59:50,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:59:50,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:59:50,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-10-23 21:59:50,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:59:50,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:59:50,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:59:50,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:59:50,764 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:59:50,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:59:50,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:59:50,772 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:59:50,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:59:50,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:59:50,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:59:50,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:59:50,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:59:50,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:59:50,774 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:59:50,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:59:50,775 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:59:50,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:59:50,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:59:50,776 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:59:50,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:59:50,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:59:50,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:59:50,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:59:50,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:59:50,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:59:50,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:59:51,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:59:51,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:59:51,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:59:51,237 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:59:51,238 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:59:51,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-10-23 21:59:51,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd6318b77/a5b297504f644bf1a2452a4f702e07c6/FLAG1cfbf3e70 [2020-10-23 21:59:51,948 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:59:51,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-10-23 21:59:51,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd6318b77/a5b297504f644bf1a2452a4f702e07c6/FLAG1cfbf3e70 [2020-10-23 21:59:52,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd6318b77/a5b297504f644bf1a2452a4f702e07c6 [2020-10-23 21:59:52,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:59:52,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:59:52,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:59:52,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:59:52,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:59:52,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:59:52" (1/1) ... [2020-10-23 21:59:52,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b885834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52, skipping insertion in model container [2020-10-23 21:59:52,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:59:52" (1/1) ... [2020-10-23 21:59:52,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:59:52,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:59:52,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:59:52,629 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:59:52,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:59:52,685 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:59:52,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52 WrapperNode [2020-10-23 21:59:52,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:59:52,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:59:52,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:59:52,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:59:52,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52" (1/1) ... [2020-10-23 21:59:52,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52" (1/1) ... [2020-10-23 21:59:52,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52" (1/1) ... [2020-10-23 21:59:52,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52" (1/1) ... [2020-10-23 21:59:52,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52" (1/1) ... [2020-10-23 21:59:52,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52" (1/1) ... [2020-10-23 21:59:52,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52" (1/1) ... [2020-10-23 21:59:52,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:59:52,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:59:52,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:59:52,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:59:52,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:59:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:59:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:59:52,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:59:52,918 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 21:59:52,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:59:52,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:59:52,919 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:59:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:59:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 21:59:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 21:59:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:59:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:59:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 21:59:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:59:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:59:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:59:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:59:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:59:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:59:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:59:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:59:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:59:53,767 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:59:53,768 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 21:59:53,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:59:53 BoogieIcfgContainer [2020-10-23 21:59:53,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:59:53,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:59:53,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:59:53,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:59:53,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:59:52" (1/3) ... [2020-10-23 21:59:53,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539eff4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:59:53, skipping insertion in model container [2020-10-23 21:59:53,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:59:52" (2/3) ... [2020-10-23 21:59:53,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539eff4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:59:53, skipping insertion in model container [2020-10-23 21:59:53,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:59:53" (3/3) ... [2020-10-23 21:59:53,785 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-10-23 21:59:53,800 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:59:53,809 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:59:53,825 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:59:53,872 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:59:53,872 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:59:53,872 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:59:53,873 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:59:53,873 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:59:53,873 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:59:53,874 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:59:53,874 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:59:53,905 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-10-23 21:59:53,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 21:59:53,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:59:53,919 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] [2020-10-23 21:59:53,920 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:59:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:59:53,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1272536975, now seen corresponding path program 1 times [2020-10-23 21:59:53,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:59:53,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895703974] [2020-10-23 21:59:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:59:54,046 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:59:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:54,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:59:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:59:54,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895703974] [2020-10-23 21:59:54,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:59:54,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:59:54,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23153633] [2020-10-23 21:59:54,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:59:54,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:59:54,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:59:54,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:59:54,332 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 3 states. [2020-10-23 21:59:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:59:54,988 INFO L93 Difference]: Finished difference Result 149 states and 221 transitions. [2020-10-23 21:59:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:59:54,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-23 21:59:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:59:55,023 INFO L225 Difference]: With dead ends: 149 [2020-10-23 21:59:55,024 INFO L226 Difference]: Without dead ends: 78 [2020-10-23 21:59:55,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:59:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-23 21:59:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-23 21:59:55,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-23 21:59:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-10-23 21:59:55,137 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 28 [2020-10-23 21:59:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:59:55,138 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-10-23 21:59:55,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:59:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-10-23 21:59:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 21:59:55,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:59:55,141 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] [2020-10-23 21:59:55,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:59:55,142 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:59:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:59:55,143 INFO L82 PathProgramCache]: Analyzing trace with hash -370927728, now seen corresponding path program 1 times [2020-10-23 21:59:55,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:59:55,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908381686] [2020-10-23 21:59:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:59:55,147 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:59:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:55,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:59:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:59:55,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908381686] [2020-10-23 21:59:55,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:59:55,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:59:55,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254299581] [2020-10-23 21:59:55,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:59:55,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:59:55,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:59:55,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:59:55,342 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 6 states. [2020-10-23 21:59:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:59:56,073 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2020-10-23 21:59:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:59:56,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-23 21:59:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:59:56,076 INFO L225 Difference]: With dead ends: 102 [2020-10-23 21:59:56,076 INFO L226 Difference]: Without dead ends: 98 [2020-10-23 21:59:56,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:59:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-23 21:59:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-10-23 21:59:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-23 21:59:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2020-10-23 21:59:56,111 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 29 [2020-10-23 21:59:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:59:56,111 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2020-10-23 21:59:56,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:59:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2020-10-23 21:59:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 21:59:56,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:59:56,113 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] [2020-10-23 21:59:56,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:59:56,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:59:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:59:56,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1093511260, now seen corresponding path program 1 times [2020-10-23 21:59:56,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:59:56,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912576738] [2020-10-23 21:59:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:59:56,120 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:59:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:56,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:59:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:56,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 21:59:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:59:56,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912576738] [2020-10-23 21:59:56,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:59:56,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:59:56,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178590142] [2020-10-23 21:59:56,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:59:56,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:59:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:59:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:59:56,296 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand 7 states. [2020-10-23 21:59:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:59:57,025 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2020-10-23 21:59:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:59:57,026 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-23 21:59:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:59:57,028 INFO L225 Difference]: With dead ends: 106 [2020-10-23 21:59:57,029 INFO L226 Difference]: Without dead ends: 93 [2020-10-23 21:59:57,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-23 21:59:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-23 21:59:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-10-23 21:59:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-23 21:59:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2020-10-23 21:59:57,070 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 34 [2020-10-23 21:59:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:59:57,071 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2020-10-23 21:59:57,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:59:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2020-10-23 21:59:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 21:59:57,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:59:57,073 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] [2020-10-23 21:59:57,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:59:57,073 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:59:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:59:57,074 INFO L82 PathProgramCache]: Analyzing trace with hash 33274449, now seen corresponding path program 1 times [2020-10-23 21:59:57,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:59:57,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699132930] [2020-10-23 21:59:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:59:57,078 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:59:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:57,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:59:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:57,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-23 21:59:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:59:57,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699132930] [2020-10-23 21:59:57,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:59:57,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:59:57,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069705437] [2020-10-23 21:59:57,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:59:57,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:59:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:59:57,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:59:57,215 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 8 states. [2020-10-23 21:59:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:59:57,895 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2020-10-23 21:59:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:59:57,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-23 21:59:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:59:57,898 INFO L225 Difference]: With dead ends: 101 [2020-10-23 21:59:57,900 INFO L226 Difference]: Without dead ends: 97 [2020-10-23 21:59:57,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-23 21:59:57,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-23 21:59:57,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-10-23 21:59:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-23 21:59:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-10-23 21:59:57,939 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 37 [2020-10-23 21:59:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:59:57,940 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-10-23 21:59:57,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:59:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-10-23 21:59:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 21:59:57,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:59:57,943 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1] [2020-10-23 21:59:57,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:59:57,943 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:59:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:59:57,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1958904793, now seen corresponding path program 1 times [2020-10-23 21:59:57,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:59:57,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77261201] [2020-10-23 21:59:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:59:57,948 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:59:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:58,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:59:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:58,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-23 21:59:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:58,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-23 21:59:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:59:58,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77261201] [2020-10-23 21:59:58,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:59:58,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:59:58,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921895951] [2020-10-23 21:59:58,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:59:58,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:59:58,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:59:58,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:59:58,119 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 8 states. [2020-10-23 21:59:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:59:59,027 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2020-10-23 21:59:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 21:59:59,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-23 21:59:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:59:59,034 INFO L225 Difference]: With dead ends: 131 [2020-10-23 21:59:59,037 INFO L226 Difference]: Without dead ends: 126 [2020-10-23 21:59:59,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-23 21:59:59,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-23 21:59:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2020-10-23 21:59:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-23 21:59:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-10-23 21:59:59,088 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 47 [2020-10-23 21:59:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:59:59,088 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-10-23 21:59:59,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:59:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-10-23 21:59:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 21:59:59,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:59:59,091 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1] [2020-10-23 21:59:59,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:59:59,092 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:59:59,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:59:59,093 INFO L82 PathProgramCache]: Analyzing trace with hash 602823005, now seen corresponding path program 1 times [2020-10-23 21:59:59,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:59:59,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671302607] [2020-10-23 21:59:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:59:59,096 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-23 21:59:59,103 INFO L168 Benchmark]: Toolchain (without parser) took 6772.64 ms. Allocated memory was 154.1 MB in the beginning and 223.3 MB in the end (delta: 69.2 MB). Free memory was 130.2 MB in the beginning and 191.2 MB in the end (delta: -61.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:59,104 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:59:59,105 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.54 ms. Allocated memory is still 154.1 MB. Free memory was 129.5 MB in the beginning and 119.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:59,106 INFO L168 Benchmark]: Boogie Preprocessor took 93.70 ms. Allocated memory is still 154.1 MB. Free memory was 119.5 MB in the beginning and 118.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:59,108 INFO L168 Benchmark]: RCFGBuilder took 986.12 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 132.2 MB in the end (delta: -14.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:59,109 INFO L168 Benchmark]: TraceAbstraction took 5325.22 ms. Allocated memory was 154.1 MB in the beginning and 223.3 MB in the end (delta: 69.2 MB). Free memory was 132.2 MB in the beginning and 191.2 MB in the end (delta: -58.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:59,114 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 341.54 ms. Allocated memory is still 154.1 MB. Free memory was 129.5 MB in the beginning and 119.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 93.70 ms. Allocated memory is still 154.1 MB. Free memory was 119.5 MB in the beginning and 118.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 986.12 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 132.2 MB in the end (delta: -14.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5325.22 ms. Allocated memory was 154.1 MB in the beginning and 223.3 MB in the end (delta: 69.2 MB). Free memory was 132.2 MB in the beginning and 191.2 MB in the end (delta: -58.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...