/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/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:15,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:15,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:16,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:16,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:16,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:16,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:16,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:16,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:16,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:16,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:16,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:16,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:16,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:16,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:16,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:16,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:16,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:16,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:16,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:16,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:16,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:16,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:16,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:16,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:43:16,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:43:16,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:43:16,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:43:16,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:43:16,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:43:16,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:43:16,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:43:16,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:43:16,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:43:16,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:43:16,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:43:16,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:43:16,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:43:16,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:16,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:16,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:16,125 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 18:43:16,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:16,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:16,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:16,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:16,185 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:16,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:16,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:16,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:16,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:16,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:16,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:16,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:16,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:16,189 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:16,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:16,189 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:16,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:16,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:16,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:16,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:16,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:16,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:16,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:16,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:16,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:16,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:16,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:16,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:16,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:16,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:16,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:16,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:16,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:16,683 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:16,684 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:16,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-10-23 18:43:16,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203154477/86c48de265664cd4b4bf215589fd7279/FLAG0d7eaec13 [2020-10-23 18:43:17,433 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:17,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2020-10-23 18:43:17,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203154477/86c48de265664cd4b4bf215589fd7279/FLAG0d7eaec13 [2020-10-23 18:43:17,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203154477/86c48de265664cd4b4bf215589fd7279 [2020-10-23 18:43:17,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:17,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:17,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:17,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:17,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:17,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:17" (1/1) ... [2020-10-23 18:43:17,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be041f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:17, skipping insertion in model container [2020-10-23 18:43:17,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:17" (1/1) ... [2020-10-23 18:43:17,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:17,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:18,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:18,080 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:18,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:18,119 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:18,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18 WrapperNode [2020-10-23 18:43:18,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:18,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:18,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:18,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:18,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18" (1/1) ... [2020-10-23 18:43:18,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18" (1/1) ... [2020-10-23 18:43:18,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18" (1/1) ... [2020-10-23 18:43:18,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18" (1/1) ... [2020-10-23 18:43:18,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18" (1/1) ... [2020-10-23 18:43:18,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18" (1/1) ... [2020-10-23 18:43:18,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18" (1/1) ... [2020-10-23 18:43:18,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:18,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:18,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:18,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:18,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18" (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 18:43:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:43:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:43:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:18,644 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:18,645 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:43:18,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:18 BoogieIcfgContainer [2020-10-23 18:43:18,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:18,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:18,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:18,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:18,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:17" (1/3) ... [2020-10-23 18:43:18,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7423cca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:18, skipping insertion in model container [2020-10-23 18:43:18,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:18" (2/3) ... [2020-10-23 18:43:18,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7423cca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:18, skipping insertion in model container [2020-10-23 18:43:18,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:18" (3/3) ... [2020-10-23 18:43:18,665 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-10-23 18:43:18,690 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:18,700 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:18,730 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:18,789 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:18,790 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:18,790 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:18,790 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:18,790 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:18,790 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:18,790 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:18,790 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-23 18:43:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:43:18,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:18,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:18,824 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:18,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash 596948892, now seen corresponding path program 1 times [2020-10-23 18:43:18,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:18,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919207457] [2020-10-23 18:43:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:19,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:19,242 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 18:43:19,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919207457] [2020-10-23 18:43:19,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:19,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:43:19,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848012834] [2020-10-23 18:43:19,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:43:19,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:19,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:43:19,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:19,281 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-23 18:43:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:19,389 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-23 18:43:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:43:19,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-23 18:43:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:19,411 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:43:19,412 INFO L226 Difference]: Without dead ends: 15 [2020-10-23 18:43:19,419 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 18:43:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-23 18:43:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-23 18:43:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-23 18:43:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-23 18:43:19,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-23 18:43:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:19,474 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-23 18:43:19,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:43:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-23 18:43:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:43:19,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:19,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:19,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:19,476 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash -433105898, now seen corresponding path program 1 times [2020-10-23 18:43:19,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:19,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754293328] [2020-10-23 18:43:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:19,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:19,626 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 18:43:19,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754293328] [2020-10-23 18:43:19,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:19,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:43:19,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814049707] [2020-10-23 18:43:19,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:43:19,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:43:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:43:19,630 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-10-23 18:43:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:19,760 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-23 18:43:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:43:19,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-23 18:43:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:19,763 INFO L225 Difference]: With dead ends: 24 [2020-10-23 18:43:19,763 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:43:19,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:43:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-23 18:43:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-23 18:43:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-23 18:43:19,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-23 18:43:19,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:19,773 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-23 18:43:19,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:43:19,773 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-23 18:43:19,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:43:19,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:19,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:19,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:19,775 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1176580852, now seen corresponding path program 1 times [2020-10-23 18:43:19,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:19,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552398214] [2020-10-23 18:43:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:19,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:19,859 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 18:43:19,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552398214] [2020-10-23 18:43:19,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288956442] [2020-10-23 18:43:19,860 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 18:43:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:19,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:43:19,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:20,003 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 18:43:20,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:20,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-23 18:43:20,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360072255] [2020-10-23 18:43:20,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:20,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:20,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:20,006 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2020-10-23 18:43:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:20,112 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-23 18:43:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:20,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:43:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:20,114 INFO L225 Difference]: With dead ends: 26 [2020-10-23 18:43:20,114 INFO L226 Difference]: Without dead ends: 19 [2020-10-23 18:43:20,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-23 18:43:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-23 18:43:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-23 18:43:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-23 18:43:20,122 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-23 18:43:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:20,122 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-23 18:43:20,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-23 18:43:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:43:20,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:20,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:20,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:43:20,338 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1897321042, now seen corresponding path program 2 times [2020-10-23 18:43:20,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:20,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359637827] [2020-10-23 18:43:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:20,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:20,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359637827] [2020-10-23 18:43:20,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965617999] [2020-10-23 18:43:20,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 18:43:20,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:43:20,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:20,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:43:20,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:20,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:20,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-23 18:43:20,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927234411] [2020-10-23 18:43:20,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:43:20,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:43:20,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:20,546 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-10-23 18:43:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:20,741 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-23 18:43:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:20,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-23 18:43:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:20,743 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:43:20,743 INFO L226 Difference]: Without dead ends: 21 [2020-10-23 18:43:20,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-23 18:43:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-23 18:43:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:43:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-23 18:43:20,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-23 18:43:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:20,751 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-23 18:43:20,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:43:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-23 18:43:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:43:20,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:20,753 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:20,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:20,969 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:20,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1256058320, now seen corresponding path program 3 times [2020-10-23 18:43:20,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:20,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71446429] [2020-10-23 18:43:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:21,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:21,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71446429] [2020-10-23 18:43:21,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646727379] [2020-10-23 18:43:21,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:21,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:43:21,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:43:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:21,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:21,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-23 18:43:21,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832501246] [2020-10-23 18:43:21,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:43:21,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:21,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:43:21,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:21,237 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-10-23 18:43:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:21,431 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-23 18:43:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:21,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-23 18:43:21,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:21,432 INFO L225 Difference]: With dead ends: 30 [2020-10-23 18:43:21,432 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:43:21,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:43:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:43:21,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-23 18:43:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-23 18:43:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-23 18:43:21,441 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-23 18:43:21,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:21,441 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-23 18:43:21,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:43:21,441 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-23 18:43:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:43:21,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:21,442 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:21,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:21,659 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash 593285774, now seen corresponding path program 4 times [2020-10-23 18:43:21,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:21,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199748961] [2020-10-23 18:43:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:21,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:21,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199748961] [2020-10-23 18:43:21,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827319782] [2020-10-23 18:43:21,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:21,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:43:21,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:21,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:43:21,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:21,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:21,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-23 18:43:21,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670654240] [2020-10-23 18:43:21,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:43:21,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:21,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:43:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:21,908 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2020-10-23 18:43:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:22,129 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-23 18:43:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:43:22,130 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-23 18:43:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:22,131 INFO L225 Difference]: With dead ends: 32 [2020-10-23 18:43:22,131 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 18:43:22,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:43:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 18:43:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-23 18:43:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-23 18:43:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-23 18:43:22,139 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-23 18:43:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:22,139 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-23 18:43:22,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:43:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-23 18:43:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:43:22,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:22,140 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:22,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:22,342 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash -303500436, now seen corresponding path program 5 times [2020-10-23 18:43:22,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:22,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064475831] [2020-10-23 18:43:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:22,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:22,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064475831] [2020-10-23 18:43:22,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312257476] [2020-10-23 18:43:22,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:22,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:43:22,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:22,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:43:22,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:22,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:22,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-23 18:43:22,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808751158] [2020-10-23 18:43:22,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:43:22,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:43:22,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:22,684 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 10 states. [2020-10-23 18:43:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:22,966 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-23 18:43:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:43:22,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-23 18:43:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:22,968 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:43:22,968 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 18:43:22,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:43:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 18:43:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-23 18:43:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:43:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-23 18:43:22,975 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-23 18:43:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:22,976 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-23 18:43:22,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:43:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-23 18:43:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:43:22,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:22,977 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:23,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:43:23,182 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:23,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1173378250, now seen corresponding path program 6 times [2020-10-23 18:43:23,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:23,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781346046] [2020-10-23 18:43:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:23,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:23,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781346046] [2020-10-23 18:43:23,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638715228] [2020-10-23 18:43:23,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:23,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:43:23,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:43:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:23,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:23,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:43:23,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811147878] [2020-10-23 18:43:23,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:43:23,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:23,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:43:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:43:23,455 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 11 states. [2020-10-23 18:43:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:23,760 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-23 18:43:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:43:23,760 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-23 18:43:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:23,761 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:43:23,762 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:43:23,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:43:23,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:43:23,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-23 18:43:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-23 18:43:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-23 18:43:23,769 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-23 18:43:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:23,770 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-23 18:43:23,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:43:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-23 18:43:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:43:23,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:23,771 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:23,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:23,987 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:23,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:23,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1180379480, now seen corresponding path program 7 times [2020-10-23 18:43:23,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:23,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007333457] [2020-10-23 18:43:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:24,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:24,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007333457] [2020-10-23 18:43:24,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904617181] [2020-10-23 18:43:24,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 18:43:24,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:24,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:24,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-23 18:43:24,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518583843] [2020-10-23 18:43:24,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:43:24,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:43:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:43:24,303 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 12 states. [2020-10-23 18:43:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:24,661 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-23 18:43:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:43:24,662 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-23 18:43:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:24,663 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:43:24,663 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 18:43:24,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:43:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 18:43:24,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 18:43:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:43:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-23 18:43:24,675 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-23 18:43:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:24,676 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-23 18:43:24,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:43:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-23 18:43:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:43:24,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:24,680 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:24,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:24,881 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:24,882 INFO L82 PathProgramCache]: Analyzing trace with hash 306206982, now seen corresponding path program 8 times [2020-10-23 18:43:24,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:24,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525050629] [2020-10-23 18:43:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:25,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:25,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525050629] [2020-10-23 18:43:25,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325706638] [2020-10-23 18:43:25,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:25,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:43:25,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:25,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-23 18:43:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:25,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:25,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:25,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2020-10-23 18:43:25,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736728193] [2020-10-23 18:43:25,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:43:25,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:25,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:43:25,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:43:25,361 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 16 states. [2020-10-23 18:43:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:26,068 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-23 18:43:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:43:26,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-23 18:43:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:26,070 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:43:26,070 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:43:26,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:43:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:43:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:43:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:43:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-23 18:43:26,079 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-23 18:43:26,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:26,079 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-23 18:43:26,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:43:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-23 18:43:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:43:26,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:26,080 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:26,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 18:43:26,292 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1308312604, now seen corresponding path program 9 times [2020-10-23 18:43:26,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:26,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759839585] [2020-10-23 18:43:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:26,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:26,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759839585] [2020-10-23 18:43:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664620476] [2020-10-23 18:43:26,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:26,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:43:26,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:26,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:43:26,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:26,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:43:26,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 13 [2020-10-23 18:43:26,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47207786] [2020-10-23 18:43:26,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:43:26,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:43:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:43:26,544 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-10-23 18:43:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:26,599 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-23 18:43:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:43:26,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-23 18:43:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:26,600 INFO L225 Difference]: With dead ends: 32 [2020-10-23 18:43:26,600 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:43:26,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:43:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:43:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:43:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:43:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:43:26,601 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-10-23 18:43:26,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:26,602 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:43:26,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:43:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:43:26,602 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:43:26,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:26,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:43:27,264 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-23 18:43:27,268 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-23 18:43:27,269 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-23 18:43:27,269 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-23 18:43:27,269 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-23 18:43:27,269 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-23 18:43:27,269 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:43:27,269 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 18:43:27,270 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:43:27,270 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:43:27,270 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:43:27,270 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:43:27,270 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:43:27,270 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 22 28) the Hoare annotation is: true [2020-10-23 18:43:27,270 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 22 28) no Hoare annotation was computed. [2020-10-23 18:43:27,270 INFO L274 CegarLoopResult]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-10-23 18:43:27,273 INFO L270 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0)) (and (= main_~sn~0 0) (= main_~i~0 1))) [2020-10-23 18:43:27,273 INFO L270 CegarLoopResult]: At program point L24-4(lines 24 26) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2020-10-23 18:43:27,273 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 22 28) no Hoare annotation was computed. [2020-10-23 18:43:27,274 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-10-23 18:43:27,274 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-10-23 18:43:27,274 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-23 18:43:27,274 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2020-10-23 18:43:27,274 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2020-10-23 18:43:27,274 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2020-10-23 18:43:27,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:27 BoogieIcfgContainer [2020-10-23 18:43:27,316 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:27,318 INFO L168 Benchmark]: Toolchain (without parser) took 9533.68 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.6 MB in the beginning and 155.0 MB in the end (delta: -22.5 MB). Peak memory consumption was 104.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:27,319 INFO L168 Benchmark]: CDTParser took 4.40 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:27,320 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.82 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 122.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:27,320 INFO L168 Benchmark]: Boogie Preprocessor took 56.95 ms. Allocated memory is still 151.0 MB. Free memory was 122.9 MB in the beginning and 121.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:27,322 INFO L168 Benchmark]: RCFGBuilder took 464.77 ms. Allocated memory is still 151.0 MB. Free memory was 121.3 MB in the beginning and 122.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:27,323 INFO L168 Benchmark]: TraceAbstraction took 8667.35 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 122.3 MB in the beginning and 155.0 MB in the end (delta: -32.8 MB). Peak memory consumption was 95.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:27,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 4.40 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 327.82 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 122.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 56.95 ms. Allocated memory is still 151.0 MB. Free memory was 122.9 MB in the beginning and 121.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 464.77 ms. Allocated memory is still 151.0 MB. Free memory was 121.3 MB in the beginning and 122.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8667.35 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 122.3 MB in the beginning and 155.0 MB in the end (delta: -32.8 MB). Peak memory consumption was 95.4 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: 24]: Loop Invariant Derived loop invariant: ((((((((((i <= 4 && 6 <= sn) && 4 <= i) && sn <= 6) || (((7 <= i && i <= 7) && 12 <= sn) && sn <= 12)) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 6 && 10 <= sn) && sn <= 10) && 6 <= i)) || (((2 <= i && sn <= 2) && 2 <= sn) && i <= 2)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((i <= 8 && 8 <= i) && sn <= 14) && 14 <= sn)) || (sn == 0 && i == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.0s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 166 SDslu, 294 SDs, 0 SdLazy, 615 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=10, 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, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 39 PreInvPairs, 49 NumberOfFragments, 150 HoareAnnotationTreeSize, 39 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 299 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 440 NumberOfCodeBlocks, 438 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 420 ConstructedInterpolants, 0 QuantifiedInterpolants, 28464 SizeOfPredicates, 9 NumberOfNonLiveVariables, 891 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 147/570 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...