/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 06:07:10,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 06:07:10,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 06:07:10,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 06:07:10,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 06:07:10,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 06:07:10,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 06:07:10,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 06:07:10,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 06:07:10,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 06:07:10,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 06:07:10,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 06:07:10,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 06:07:10,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 06:07:10,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 06:07:10,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 06:07:10,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 06:07:10,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 06:07:10,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 06:07:10,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 06:07:10,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 06:07:10,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 06:07:10,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 06:07:10,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 06:07:10,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 06:07:10,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 06:07:10,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 06:07:10,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 06:07:10,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 06:07:10,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 06:07:10,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 06:07:10,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 06:07:10,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 06:07:10,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 06:07:10,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 06:07:10,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 06:07:10,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 06:07:10,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 06:07:10,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 06:07:10,952 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 06:07:10,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 06:07:10,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 06:07:10,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 06:07:10,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 06:07:10,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 06:07:10,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 06:07:10,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 06:07:10,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:07:10,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 06:07:10,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 06:07:10,954 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 06:07:10,954 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 06:07:11,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 06:07:11,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 06:07:11,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 06:07:11,181 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 06:07:11,182 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 06:07:11,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2021-05-06 06:07:11,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5dec7a93/c8a265a7f5914ccba05f364469b27d4a/FLAG30787f145 [2021-05-06 06:07:11,662 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 06:07:11,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2021-05-06 06:07:11,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5dec7a93/c8a265a7f5914ccba05f364469b27d4a/FLAG30787f145 [2021-05-06 06:07:11,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5dec7a93/c8a265a7f5914ccba05f364469b27d4a [2021-05-06 06:07:11,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 06:07:11,685 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 06:07:11,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 06:07:11,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 06:07:11,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 06:07:11,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:07:11" (1/1) ... [2021-05-06 06:07:11,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733fee67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:11, skipping insertion in model container [2021-05-06 06:07:11,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:07:11" (1/1) ... [2021-05-06 06:07:11,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 06:07:11,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 06:07:11,907 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2021-05-06 06:07:11,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:07:11,942 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 06:07:12,018 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2021-05-06 06:07:12,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:07:12,045 INFO L208 MainTranslator]: Completed translation [2021-05-06 06:07:12,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12 WrapperNode [2021-05-06 06:07:12,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 06:07:12,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 06:07:12,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 06:07:12,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 06:07:12,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12" (1/1) ... [2021-05-06 06:07:12,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12" (1/1) ... [2021-05-06 06:07:12,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12" (1/1) ... [2021-05-06 06:07:12,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12" (1/1) ... [2021-05-06 06:07:12,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12" (1/1) ... [2021-05-06 06:07:12,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12" (1/1) ... [2021-05-06 06:07:12,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12" (1/1) ... [2021-05-06 06:07:12,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 06:07:12,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 06:07:12,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 06:07:12,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 06:07:12,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:07:12,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 06:07:12,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 06:07:12,198 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 06:07:12,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-05-06 06:07:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 06:07:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 06:07:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 06:07:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 06:07:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-05-06 06:07:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 06:07:12,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 06:07:12,862 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-06 06:07:12,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:07:12 BoogieIcfgContainer [2021-05-06 06:07:12,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 06:07:12,863 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 06:07:12,863 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 06:07:12,864 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 06:07:12,865 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:07:12" (1/1) ... [2021-05-06 06:07:12,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:07:12 BasicIcfg [2021-05-06 06:07:12,887 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 06:07:12,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 06:07:12,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 06:07:12,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 06:07:12,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 06:07:11" (1/4) ... [2021-05-06 06:07:12,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb9a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:07:12, skipping insertion in model container [2021-05-06 06:07:12,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:12" (2/4) ... [2021-05-06 06:07:12,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb9a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:07:12, skipping insertion in model container [2021-05-06 06:07:12,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:07:12" (3/4) ... [2021-05-06 06:07:12,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb9a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:07:12, skipping insertion in model container [2021-05-06 06:07:12,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:07:12" (4/4) ... [2021-05-06 06:07:12,892 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.cJordan [2021-05-06 06:07:12,895 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 06:07:12,912 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 06:07:12,923 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 06:07:12,950 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 06:07:12,951 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 06:07:12,951 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 06:07:12,951 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 06:07:12,951 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 06:07:12,951 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 06:07:12,951 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 06:07:12,951 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 06:07:12,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 06:07:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 06:07:12,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:12,986 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:12,986 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:12,989 INFO L82 PathProgramCache]: Analyzing trace with hash 600195039, now seen corresponding path program 1 times [2021-05-06 06:07:12,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:12,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498653158] [2021-05-06 06:07:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:13,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:07:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:13,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:13,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498653158] [2021-05-06 06:07:13,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498653158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:07:13,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:07:13,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 06:07:13,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805500401] [2021-05-06 06:07:13,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 06:07:13,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:13,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 06:07:13,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:07:13,374 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:13,461 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-05-06 06:07:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 06:07:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 06:07:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:13,467 INFO L225 Difference]: With dead ends: 29 [2021-05-06 06:07:13,467 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 06:07:13,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 06:07:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 06:07:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-05-06 06:07:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-06 06:07:13,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-05-06 06:07:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:13,489 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-06 06:07:13,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-06 06:07:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 06:07:13,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:13,492 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:13,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 06:07:13,493 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:13,494 INFO L82 PathProgramCache]: Analyzing trace with hash 600224830, now seen corresponding path program 1 times [2021-05-06 06:07:13,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:13,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314802618] [2021-05-06 06:07:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:13,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:07:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:13,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314802618] [2021-05-06 06:07:13,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314802618] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:07:13,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:07:13,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 06:07:13,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123921694] [2021-05-06 06:07:13,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 06:07:13,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:13,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 06:07:13,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:07:13,672 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:13,766 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-05-06 06:07:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 06:07:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 06:07:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:13,767 INFO L225 Difference]: With dead ends: 24 [2021-05-06 06:07:13,767 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 06:07:13,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 06:07:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 06:07:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-05-06 06:07:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-06 06:07:13,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2021-05-06 06:07:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:13,770 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-06 06:07:13,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-06 06:07:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 06:07:13,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:13,771 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:13,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 06:07:13,771 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:13,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1638883516, now seen corresponding path program 1 times [2021-05-06 06:07:13,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:13,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558144382] [2021-05-06 06:07:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:13,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:07:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:13,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:13,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558144382] [2021-05-06 06:07:13,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558144382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:13,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134774130] [2021-05-06 06:07:13,925 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 [2021-05-06 06:07:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:14,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 06:07:14,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:14,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:14,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134774130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:14,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:07:14,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-06 06:07:14,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104140538] [2021-05-06 06:07:14,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 06:07:14,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:14,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 06:07:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 06:07:14,231 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:14,406 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-05-06 06:07:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 06:07:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 06:07:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:14,407 INFO L225 Difference]: With dead ends: 30 [2021-05-06 06:07:14,407 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 06:07:14,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 06:07:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 06:07:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-05-06 06:07:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-05-06 06:07:14,422 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2021-05-06 06:07:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:14,423 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-05-06 06:07:14,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-05-06 06:07:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 06:07:14,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:14,423 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:14,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 06:07:14,642 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -471618102, now seen corresponding path program 2 times [2021-05-06 06:07:14,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:14,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971630282] [2021-05-06 06:07:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:14,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:07:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:14,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:14,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971630282] [2021-05-06 06:07:14,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971630282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:14,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187975665] [2021-05-06 06:07:14,744 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 [2021-05-06 06:07:14,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:07:14,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:14,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 06:07:14,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:14,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:14,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187975665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:14,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:07:14,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-06 06:07:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874885173] [2021-05-06 06:07:14,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 06:07:14,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 06:07:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 06:07:14,949 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:15,102 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-05-06 06:07:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 06:07:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 06:07:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:15,103 INFO L225 Difference]: With dead ends: 36 [2021-05-06 06:07:15,104 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 06:07:15,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-06 06:07:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 06:07:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-05-06 06:07:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-06 06:07:15,106 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2021-05-06 06:07:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:15,107 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-06 06:07:15,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-06 06:07:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 06:07:15,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:15,107 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:15,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:15,325 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:15,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:15,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1225310256, now seen corresponding path program 3 times [2021-05-06 06:07:15,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:15,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327415387] [2021-05-06 06:07:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:15,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:07:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:15,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:15,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327415387] [2021-05-06 06:07:15,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327415387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:15,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813083167] [2021-05-06 06:07:15,497 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 [2021-05-06 06:07:16,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 06:07:16,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:16,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 06:07:16,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:16,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,855 INFO L354 Elim1Store]: treesize reduction 9, result has 89.9 percent of original size [2021-05-06 06:07:16,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 95 [2021-05-06 06:07:16,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-06 06:07:16,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 06:07:16,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-06 06:07:16,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:42 [2021-05-06 06:07:16,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:16,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:17,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 06:07:17,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813083167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:17,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:07:17,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-06 06:07:17,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193813607] [2021-05-06 06:07:17,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 06:07:17,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:17,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 06:07:17,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-06 06:07:17,032 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 06:07:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:17,817 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-06 06:07:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 06:07:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2021-05-06 06:07:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:17,818 INFO L225 Difference]: With dead ends: 42 [2021-05-06 06:07:17,818 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 06:07:17,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 840.2ms TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-05-06 06:07:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 06:07:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 06:07:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 06:07:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 06:07:17,819 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-05-06 06:07:17,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:17,819 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 06:07:17,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 06:07:17,819 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 06:07:17,819 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 06:07:18,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:18,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:07:18 BasicIcfg [2021-05-06 06:07:18,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 06:07:18,024 INFO L168 Benchmark]: Toolchain (without parser) took 6338.52 ms. Allocated memory was 192.9 MB in the beginning and 384.8 MB in the end (delta: 191.9 MB). Free memory was 157.4 MB in the beginning and 336.9 MB in the end (delta: -179.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:18,024 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 192.9 MB. Free memory is still 174.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 06:07:18,024 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.32 ms. Allocated memory is still 192.9 MB. Free memory was 157.2 MB in the beginning and 171.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:18,024 INFO L168 Benchmark]: Boogie Preprocessor took 85.21 ms. Allocated memory is still 192.9 MB. Free memory was 171.8 MB in the beginning and 168.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:18,024 INFO L168 Benchmark]: RCFGBuilder took 731.19 ms. Allocated memory is still 192.9 MB. Free memory was 168.3 MB in the beginning and 150.7 MB in the end (delta: 17.6 MB). Peak memory consumption was 52.6 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:18,024 INFO L168 Benchmark]: IcfgTransformer took 24.02 ms. Allocated memory is still 192.9 MB. Free memory was 150.7 MB in the beginning and 149.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:18,024 INFO L168 Benchmark]: TraceAbstraction took 5135.31 ms. Allocated memory was 192.9 MB in the beginning and 384.8 MB in the end (delta: 191.9 MB). Free memory was 148.6 MB in the beginning and 336.9 MB in the end (delta: -188.3 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:18,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 192.9 MB. Free memory is still 174.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 358.32 ms. Allocated memory is still 192.9 MB. Free memory was 157.2 MB in the beginning and 171.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.21 ms. Allocated memory is still 192.9 MB. Free memory was 171.8 MB in the beginning and 168.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 731.19 ms. Allocated memory is still 192.9 MB. Free memory was 168.3 MB in the beginning and 150.7 MB in the end (delta: 17.6 MB). Peak memory consumption was 52.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 24.02 ms. Allocated memory is still 192.9 MB. Free memory was 150.7 MB in the beginning and 149.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5135.31 ms. Allocated memory was 192.9 MB in the beginning and 384.8 MB in the end (delta: 191.9 MB). Free memory was 148.6 MB in the beginning and 336.9 MB in the end (delta: -188.3 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 193]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5071.2ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 18.9ms, AutomataDifference: 1317.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 73 SDtfs, 173 SDslu, 181 SDs, 0 SdLazy, 344 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 354.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1278.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=4, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 107.2ms SsaConstructionTime, 1177.8ms SatisfiabilityAnalysisTime, 1471.2ms InterpolantComputationTime, 176 NumberOfCodeBlocks, 170 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 168 ConstructedInterpolants, 22 QuantifiedInterpolants, 1565 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1457 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 40/108 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...