/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:35,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:35,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:35,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:43:35,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:35,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:35,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:35,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:35,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:35,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:35,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:35,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:35,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:35,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:35,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:35,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:35,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:43:35,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:35,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:35,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:35,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:43:35,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:35,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:35,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:35,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:35,902 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:35,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:35,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:35,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:35,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:35,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:35,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:35,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:35,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:35,904 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:35,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:35,904 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:35,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:35,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:35,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:35,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:35,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:35,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:35,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:35,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:35,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:35,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:35,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:35,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:35,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:35,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:36,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:36,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:36,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:36,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:36,304 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:36,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-23 18:43:36,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a90c5926d/c8fd79546236433bad810614f52992f7/FLAG003bba878 [2020-10-23 18:43:37,112 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:37,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-23 18:43:37,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a90c5926d/c8fd79546236433bad810614f52992f7/FLAG003bba878 [2020-10-23 18:43:37,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a90c5926d/c8fd79546236433bad810614f52992f7 [2020-10-23 18:43:37,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:37,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:37,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:37,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:37,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:37,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:37" (1/1) ... [2020-10-23 18:43:37,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad3a293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37, skipping insertion in model container [2020-10-23 18:43:37,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:37" (1/1) ... [2020-10-23 18:43:37,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:37,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:37,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:37,705 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:37,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:37,746 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:37,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37 WrapperNode [2020-10-23 18:43:37,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:37,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:37,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:37,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:37,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37" (1/1) ... [2020-10-23 18:43:37,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37" (1/1) ... [2020-10-23 18:43:37,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37" (1/1) ... [2020-10-23 18:43:37,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37" (1/1) ... [2020-10-23 18:43:37,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37" (1/1) ... [2020-10-23 18:43:37,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37" (1/1) ... [2020-10-23 18:43:37,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37" (1/1) ... [2020-10-23 18:43:37,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:37,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:37,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:37,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:37,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37" (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 18:43:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:37,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:43:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:43:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:43:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:38,234 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:38,234 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 18:43:38,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:38 BoogieIcfgContainer [2020-10-23 18:43:38,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:38,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:38,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:38,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:38,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:37" (1/3) ... [2020-10-23 18:43:38,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b7879a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:38, skipping insertion in model container [2020-10-23 18:43:38,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:37" (2/3) ... [2020-10-23 18:43:38,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b7879a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:38, skipping insertion in model container [2020-10-23 18:43:38,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:38" (3/3) ... [2020-10-23 18:43:38,249 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-10-23 18:43:38,264 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:38,270 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:38,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:38,340 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:38,341 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:38,341 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:38,342 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:38,342 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:38,342 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:38,342 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:38,342 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-23 18:43:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:43:38,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:38,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:38,371 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash 174536931, now seen corresponding path program 1 times [2020-10-23 18:43:38,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:38,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796184237] [2020-10-23 18:43:38,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:38,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:38,743 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 18:43:38,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796184237] [2020-10-23 18:43:38,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:38,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:43:38,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951379288] [2020-10-23 18:43:38,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:43:38,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:43:38,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:38,777 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-23 18:43:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:38,912 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-23 18:43:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:43:38,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-23 18:43:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:38,923 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:43:38,923 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:43:38,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:43:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:43:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:43:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-23 18:43:38,973 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-23 18:43:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:38,973 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-23 18:43:38,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:43:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-23 18:43:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:38,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:38,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:38,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:38,975 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1346698167, now seen corresponding path program 1 times [2020-10-23 18:43:38,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:38,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337779977] [2020-10-23 18:43:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:39,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:39,140 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 18:43:39,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337779977] [2020-10-23 18:43:39,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:39,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:43:39,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355987133] [2020-10-23 18:43:39,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:43:39,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:39,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:43:39,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:43:39,153 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-23 18:43:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:39,291 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-23 18:43:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:43:39,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-23 18:43:39,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:39,294 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:43:39,295 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 18:43:39,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:43:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 18:43:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-23 18:43:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-23 18:43:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-23 18:43:39,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-23 18:43:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:39,306 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-23 18:43:39,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:43:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-23 18:43:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:43:39,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:39,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:39,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:39,308 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:39,309 INFO L82 PathProgramCache]: Analyzing trace with hash 261615961, now seen corresponding path program 1 times [2020-10-23 18:43:39,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:39,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081645467] [2020-10-23 18:43:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:39,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:39,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081645467] [2020-10-23 18:43:39,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138155017] [2020-10-23 18:43:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:43:39,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:39,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:39,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-23 18:43:39,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718435296] [2020-10-23 18:43:39,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:39,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:39,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:39,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:39,665 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-10-23 18:43:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:39,805 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-23 18:43:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:39,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-23 18:43:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:39,808 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:43:39,808 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:43:39,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:43:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-23 18:43:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:43:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-23 18:43:39,819 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-10-23 18:43:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:39,820 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-23 18:43:39,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-23 18:43:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:43:39,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:39,821 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:40,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:43:40,037 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1174668923, now seen corresponding path program 2 times [2020-10-23 18:43:40,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:40,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500643769] [2020-10-23 18:43:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:40,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:43:40,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500643769] [2020-10-23 18:43:40,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:40,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:40,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689175694] [2020-10-23 18:43:40,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:40,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:40,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:40,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:40,262 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-23 18:43:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:40,518 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-23 18:43:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:40,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-23 18:43:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:40,520 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:43:40,520 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 18:43:40,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 18:43:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 18:43:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:43:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-23 18:43:40,529 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 20 [2020-10-23 18:43:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:40,529 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-23 18:43:40,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-23 18:43:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:43:40,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:40,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:40,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:43:40,531 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash -244529086, now seen corresponding path program 1 times [2020-10-23 18:43:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:40,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209568322] [2020-10-23 18:43:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:40,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:43:40,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209568322] [2020-10-23 18:43:40,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238824452] [2020-10-23 18:43:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:43:40,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:43:40,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:40,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2020-10-23 18:43:40,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133497135] [2020-10-23 18:43:40,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:43:40,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:40,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:43:40,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:40,799 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-10-23 18:43:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:41,067 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-23 18:43:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:43:41,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-23 18:43:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:41,069 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:43:41,069 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:43:41,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:43:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:43:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-23 18:43:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:43:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-23 18:43:41,079 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2020-10-23 18:43:41,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:41,079 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-23 18:43:41,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:43:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-23 18:43:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:43:41,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:41,081 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:41,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:41,298 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:41,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1746062066, now seen corresponding path program 2 times [2020-10-23 18:43:41,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:41,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545032798] [2020-10-23 18:43:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:41,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-23 18:43:41,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545032798] [2020-10-23 18:43:41,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:41,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:43:41,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974583929] [2020-10-23 18:43:41,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:43:41,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:41,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:43:41,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:41,475 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-10-23 18:43:41,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:41,688 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-23 18:43:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:41,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-23 18:43:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:41,689 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:43:41,689 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:43:41,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:41,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:43:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:43:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:43:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:43:41,691 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-10-23 18:43:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:41,692 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:43:41,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:43:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:43:41,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:43:41,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:43:41,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:43:41,943 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-23 18:43:41,943 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-23 18:43:41,944 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-23 18:43:41,944 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-23 18:43:41,944 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-23 18:43:41,944 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:43:41,945 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-23 18:43:41,945 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:43:41,945 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:43:41,945 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:43:41,945 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:43:41,945 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:43:41,945 INFO L274 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-10-23 18:43:41,946 INFO L274 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-10-23 18:43:41,946 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 20 34) no Hoare annotation was computed. [2020-10-23 18:43:41,946 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 20 34) no Hoare annotation was computed. [2020-10-23 18:43:41,946 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 20 34) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-10-23 18:43:41,946 INFO L274 CegarLoopResult]: For program point L28-1(lines 28 32) no Hoare annotation was computed. [2020-10-23 18:43:41,946 INFO L274 CegarLoopResult]: For program point L28-3(lines 28 32) no Hoare annotation was computed. [2020-10-23 18:43:41,946 INFO L270 CegarLoopResult]: At program point L28-4(lines 28 32) the Hoare annotation is: (<= main_~i~0 1023) [2020-10-23 18:43:41,947 INFO L270 CegarLoopResult]: At program point L28-5(lines 28 32) the Hoare annotation is: (<= main_~i~0 1024) [2020-10-23 18:43:41,947 INFO L274 CegarLoopResult]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-10-23 18:43:41,947 INFO L277 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: true [2020-10-23 18:43:41,947 INFO L274 CegarLoopResult]: For program point L24-4(lines 24 26) no Hoare annotation was computed. [2020-10-23 18:43:41,947 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 18:43:41,948 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-10-23 18:43:41,948 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-23 18:43:41,948 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2020-10-23 18:43:41,948 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2020-10-23 18:43:41,948 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2020-10-23 18:43:41,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:41 BoogieIcfgContainer [2020-10-23 18:43:41,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:41,969 INFO L168 Benchmark]: Toolchain (without parser) took 4503.21 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 130.8 MB in the beginning and 157.3 MB in the end (delta: -26.5 MB). Peak memory consumption was 81.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,969 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 155.2 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:41,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.20 ms. Allocated memory is still 155.2 MB. Free memory was 130.2 MB in the beginning and 120.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,971 INFO L168 Benchmark]: Boogie Preprocessor took 42.45 ms. Allocated memory is still 155.2 MB. Free memory was 120.4 MB in the beginning and 118.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,972 INFO L168 Benchmark]: RCFGBuilder took 446.02 ms. Allocated memory is still 155.2 MB. Free memory was 118.9 MB in the beginning and 138.7 MB in the end (delta: -19.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,973 INFO L168 Benchmark]: TraceAbstraction took 3726.45 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 138.5 MB in the beginning and 157.3 MB in the end (delta: -18.8 MB). Peak memory consumption was 88.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 155.2 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.20 ms. Allocated memory is still 155.2 MB. Free memory was 130.2 MB in the beginning and 120.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.45 ms. Allocated memory is still 155.2 MB. Free memory was 120.4 MB in the beginning and 118.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 446.02 ms. Allocated memory is still 155.2 MB. Free memory was 118.9 MB in the beginning and 138.7 MB in the end (delta: -19.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3726.45 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 138.5 MB in the beginning and 157.3 MB in the end (delta: -18.8 MB). Peak memory consumption was 88.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 78 SDslu, 129 SDs, 0 SdLazy, 258 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 29 PreInvPairs, 40 NumberOfFragments, 46 HoareAnnotationTreeSize, 29 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 71 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 8025 SizeOfPredicates, 2 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 37/45 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 correct! Received shutdown request...