/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/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:24:37,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:24:37,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:24:37,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:24:37,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:24:37,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:24:37,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:24:37,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:24:37,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:24:37,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:24:37,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:24:37,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:24:37,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:24:37,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:24:37,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:24:37,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:24:37,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:24:37,110 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:24:37,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:24:37,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:24:37,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:24:37,125 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:24:37,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:24:37,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:24:37,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:24:37,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:24:37,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:24:37,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:24:37,127 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:24:37,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:24:37,128 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:24:37,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:24:37,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:24:37,128 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:24:37,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:24:37,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:24:37,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:24:37,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:24:37,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:24:37,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:24:37,130 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:24:37,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:24:37,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:24:37,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:24:37,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:24:37,576 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:24:37,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-24 02:24:37,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214b61c58/7fdfd2772e4f4e7a9809a703533ae2f4/FLAG6e8acf0a8 [2020-10-24 02:24:38,320 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:24:38,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-24 02:24:38,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214b61c58/7fdfd2772e4f4e7a9809a703533ae2f4/FLAG6e8acf0a8 [2020-10-24 02:24:38,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214b61c58/7fdfd2772e4f4e7a9809a703533ae2f4 [2020-10-24 02:24:38,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:24:38,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:24:38,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:38,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:24:38,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:24:38,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:38" (1/1) ... [2020-10-24 02:24:38,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7411b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38, skipping insertion in model container [2020-10-24 02:24:38,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:38" (1/1) ... [2020-10-24 02:24:38,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:24:38,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:24:38,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:38,839 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:24:38,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:38,875 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:24:38,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38 WrapperNode [2020-10-24 02:24:38,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:38,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:24:38,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:24:38,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:24:38,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38" (1/1) ... [2020-10-24 02:24:38,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38" (1/1) ... [2020-10-24 02:24:38,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38" (1/1) ... [2020-10-24 02:24:38,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38" (1/1) ... [2020-10-24 02:24:38,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38" (1/1) ... [2020-10-24 02:24:38,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38" (1/1) ... [2020-10-24 02:24:38,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38" (1/1) ... [2020-10-24 02:24:38,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:24:38,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:24:38,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:24:38,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:24:38,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38" (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 [2020-10-24 02:24:38,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:24:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:24:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:24:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:24:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:24:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:24:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:24:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:24:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:24:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:24:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:24:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:24:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-24 02:24:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:24:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:24:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:24:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:24:38,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:24:38,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:24:38,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:24:39,328 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:24:39,329 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:24:39,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:39 BoogieIcfgContainer [2020-10-24 02:24:39,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:24:39,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:24:39,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:24:39,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:24:39,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:24:38" (1/3) ... [2020-10-24 02:24:39,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7975a4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:39, skipping insertion in model container [2020-10-24 02:24:39,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:38" (2/3) ... [2020-10-24 02:24:39,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7975a4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:39, skipping insertion in model container [2020-10-24 02:24:39,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:39" (3/3) ... [2020-10-24 02:24:39,340 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-10-24 02:24:39,353 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:24:39,358 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:24:39,372 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:24:39,412 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:24:39,412 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:24:39,412 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:24:39,412 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:24:39,412 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:24:39,413 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:24:39,413 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:24:39,413 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:24:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-24 02:24:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-24 02:24:39,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:39,454 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] [2020-10-24 02:24:39,454 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1111598142, now seen corresponding path program 1 times [2020-10-24 02:24:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:39,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585476632] [2020-10-24 02:24:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:39,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585476632] [2020-10-24 02:24:39,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:39,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:24:39,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799073716] [2020-10-24 02:24:39,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:24:39,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:39,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:24:39,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:24:39,850 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-24 02:24:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:39,953 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-24 02:24:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:24:39,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-24 02:24:39,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:39,965 INFO L225 Difference]: With dead ends: 53 [2020-10-24 02:24:39,965 INFO L226 Difference]: Without dead ends: 30 [2020-10-24 02:24:39,969 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 [2020-10-24 02:24:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-24 02:24:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-24 02:24:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-24 02:24:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-24 02:24:40,018 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-10-24 02:24:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:40,019 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-24 02:24:40,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:24:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-24 02:24:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-24 02:24:40,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:40,021 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] [2020-10-24 02:24:40,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:24:40,021 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:40,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:40,022 INFO L82 PathProgramCache]: Analyzing trace with hash 683944815, now seen corresponding path program 1 times [2020-10-24 02:24:40,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:40,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339634523] [2020-10-24 02:24:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:40,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339634523] [2020-10-24 02:24:40,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:40,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:24:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060853613] [2020-10-24 02:24:40,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:24:40,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:40,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:24:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:24:40,204 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 6 states. [2020-10-24 02:24:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:40,512 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-10-24 02:24:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:24:40,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-24 02:24:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:40,514 INFO L225 Difference]: With dead ends: 39 [2020-10-24 02:24:40,514 INFO L226 Difference]: Without dead ends: 32 [2020-10-24 02:24:40,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:24:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-24 02:24:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-24 02:24:40,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 02:24:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-24 02:24:40,527 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2020-10-24 02:24:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:40,527 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-24 02:24:40,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:24:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-24 02:24:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-24 02:24:40,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:40,529 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] [2020-10-24 02:24:40,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:24:40,530 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:40,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1464441781, now seen corresponding path program 1 times [2020-10-24 02:24:40,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:40,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498054453] [2020-10-24 02:24:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:40,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498054453] [2020-10-24 02:24:40,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:40,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:24:40,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61006725] [2020-10-24 02:24:40,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:24:40,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:40,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:24:40,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:24:40,848 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-24 02:24:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:41,395 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-24 02:24:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:24:41,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-24 02:24:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:41,397 INFO L225 Difference]: With dead ends: 55 [2020-10-24 02:24:41,397 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 02:24:41,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:24:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 02:24:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-24 02:24:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-24 02:24:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-24 02:24:41,410 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2020-10-24 02:24:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:41,410 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-24 02:24:41,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:24:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-24 02:24:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-24 02:24:41,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:41,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-10-24 02:24:41,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:24:41,412 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:41,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1107720153, now seen corresponding path program 2 times [2020-10-24 02:24:41,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:41,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952559596] [2020-10-24 02:24:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:41,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:41,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952559596] [2020-10-24 02:24:41,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:41,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 02:24:41,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49053840] [2020-10-24 02:24:41,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 02:24:41,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:41,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 02:24:41,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:24:41,733 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-10-24 02:24:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:42,762 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-24 02:24:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:24:42,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-24 02:24:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:42,764 INFO L225 Difference]: With dead ends: 52 [2020-10-24 02:24:42,764 INFO L226 Difference]: Without dead ends: 45 [2020-10-24 02:24:42,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:24:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-24 02:24:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-24 02:24:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-24 02:24:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-24 02:24:42,776 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 35 [2020-10-24 02:24:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:42,777 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-24 02:24:42,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 02:24:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-24 02:24:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:24:42,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:42,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-10-24 02:24:42,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:24:42,779 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:42,780 INFO L82 PathProgramCache]: Analyzing trace with hash -299416857, now seen corresponding path program 1 times [2020-10-24 02:24:42,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:42,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277204106] [2020-10-24 02:24:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:42,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:42,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277204106] [2020-10-24 02:24:42,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:42,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:24:42,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584639208] [2020-10-24 02:24:42,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:24:42,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:42,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:24:42,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:24:42,871 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 6 states. [2020-10-24 02:24:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:43,074 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-24 02:24:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:24:43,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-24 02:24:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:43,076 INFO L225 Difference]: With dead ends: 57 [2020-10-24 02:24:43,076 INFO L226 Difference]: Without dead ends: 43 [2020-10-24 02:24:43,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:24:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-24 02:24:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-24 02:24:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-24 02:24:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-24 02:24:43,087 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 36 [2020-10-24 02:24:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:43,088 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-24 02:24:43,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:24:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-24 02:24:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-24 02:24:43,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:43,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-24 02:24:43,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:24:43,090 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:43,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2064558333, now seen corresponding path program 3 times [2020-10-24 02:24:43,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:43,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828092407] [2020-10-24 02:24:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:43,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-24 02:24:43,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828092407] [2020-10-24 02:24:43,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:43,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:24:43,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884449307] [2020-10-24 02:24:43,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:24:43,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:43,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:24:43,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:24:43,461 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 17 states. [2020-10-24 02:24:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:44,794 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-24 02:24:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 02:24:44,797 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-24 02:24:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:44,798 INFO L225 Difference]: With dead ends: 57 [2020-10-24 02:24:44,798 INFO L226 Difference]: Without dead ends: 50 [2020-10-24 02:24:44,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:24:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-24 02:24:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-10-24 02:24:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-24 02:24:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-24 02:24:44,823 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2020-10-24 02:24:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:44,826 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-24 02:24:44,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:24:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-24 02:24:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 02:24:44,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:44,827 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-24 02:24:44,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:24:44,828 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:44,833 INFO L82 PathProgramCache]: Analyzing trace with hash 103370635, now seen corresponding path program 2 times [2020-10-24 02:24:44,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:44,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688350633] [2020-10-24 02:24:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:44,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:44,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688350633] [2020-10-24 02:24:44,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:44,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:24:44,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751369460] [2020-10-24 02:24:44,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:24:44,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:24:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:24:44,947 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 8 states. [2020-10-24 02:24:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:45,327 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-10-24 02:24:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:24:45,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-24 02:24:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:45,329 INFO L225 Difference]: With dead ends: 67 [2020-10-24 02:24:45,329 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 02:24:45,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:24:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 02:24:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-24 02:24:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 02:24:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-24 02:24:45,346 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2020-10-24 02:24:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:45,346 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-24 02:24:45,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:24:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-24 02:24:45,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-24 02:24:45,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:45,348 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-24 02:24:45,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:24:45,348 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1123045679, now seen corresponding path program 3 times [2020-10-24 02:24:45,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:45,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534193249] [2020-10-24 02:24:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:24:45,366 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:24:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:24:45,383 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:24:45,412 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:24:45,412 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:24:45,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:24:45,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:24:45 BoogieIcfgContainer [2020-10-24 02:24:45,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:24:45,465 INFO L168 Benchmark]: Toolchain (without parser) took 6832.09 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.8 MB in the beginning and 64.1 MB in the end (delta: 63.7 MB). Peak memory consumption was 95.3 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:45,468 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 105.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:24:45,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.16 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 118.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:45,469 INFO L168 Benchmark]: Boogie Preprocessor took 36.57 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:45,471 INFO L168 Benchmark]: RCFGBuilder took 416.35 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 134.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:45,472 INFO L168 Benchmark]: TraceAbstraction took 6129.58 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.3 MB in the beginning and 64.1 MB in the end (delta: 70.2 MB). Peak memory consumption was 101.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:45,478 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 105.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.16 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 118.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.57 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 416.35 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 134.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6129.58 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.3 MB in the beginning and 64.1 MB in the end (delta: 70.2 MB). Peak memory consumption was 101.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [__VERIFIER_nondet_uint()=4, n=4] [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [n=0, n=4] [L24] i=1 VAL [i=1, n=0, n=4] [L24] COND TRUE i<=n VAL [i=1, n=0, n=4] [L25] sn = sn + (2) VAL [i=1, n=4, n=2] [L26] COND FALSE !(i==4) VAL [i=1, n=2, n=4] [L24] i++ VAL [i=2, n=4, n=2] [L24] COND TRUE i<=n VAL [i=2, n=4, n=2] [L25] sn = sn + (2) VAL [i=2, n=4, n=4] [L26] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L24] i++ VAL [i=3, n=4, n=4] [L24] COND TRUE i<=n VAL [i=3, n=4, n=4] [L25] sn = sn + (2) VAL [i=3, n=4, n=6] [L26] COND FALSE !(i==4) VAL [i=3, n=6, n=4] [L24] i++ VAL [i=4, n=6, n=4] [L24] COND TRUE i<=n VAL [i=4, n=4, n=6] [L25] sn = sn + (2) VAL [i=4, n=8, n=4] [L26] COND TRUE i==4 VAL [i=4, n=8, n=4] [L26] sn=-10 VAL [i=4, n=4, n=-10] [L24] i++ VAL [i=5, n=4, n=-10] [L24] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01_bug02_sum01_bug02_base.case.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.0s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 189 SDtfs, 238 SDslu, 486 SDs, 0 SdLazy, 764 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 277 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 36096 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 16/59 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...