/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:50:17,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:50:17,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:50:17,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:50:17,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:50:17,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:50:17,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:50:17,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:50:17,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:50:17,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:50:17,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:50:17,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:50:17,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:50:17,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:50:17,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:50:17,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:50:17,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:50:17,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:50:17,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:50:17,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:50:17,900 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:50:17,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:50:17,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:50:17,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:50:17,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:50:17,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 19:50:17,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 19:50:17,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 19:50:17,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 19:50:17,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 19:50:17,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-17 19:50:17,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:50:17,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:50:17,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:50:17,920 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:50:17,941 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:50:17,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:50:17,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:50:17,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:50:17,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:50:17,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:50:17,943 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:50:17,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:50:17,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:50:17,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:50:17,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:50:17,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:50:17,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:50:17,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:50:17,945 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:50:17,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:50:17,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:50:17,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:50:17,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:50:17,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:50:17,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:50:17,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:50:17,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:50:17,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:50:17,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:50:17,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:50:17,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:50:17,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:50:17,947 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:50:17,947 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:50:18,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:50:18,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:50:18,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:50:18,149 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:50:18,150 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:50:18,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2022-03-17 19:50:18,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61714211a/b3cdbb0f07384272af1398fbf9497e80/FLAG83472fcaa [2022-03-17 19:50:18,526 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:50:18,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2022-03-17 19:50:18,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61714211a/b3cdbb0f07384272af1398fbf9497e80/FLAG83472fcaa [2022-03-17 19:50:18,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61714211a/b3cdbb0f07384272af1398fbf9497e80 [2022-03-17 19:50:18,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:50:18,946 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:50:18,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:50:18,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:50:18,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:50:18,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:50:18" (1/1) ... [2022-03-17 19:50:18,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd59d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:18, skipping insertion in model container [2022-03-17 19:50:18,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:50:18" (1/1) ... [2022-03-17 19:50:18,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:50:18,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:50:19,230 WARN L230 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+lh-reducer.c[8507,8520] [2022-03-17 19:50:19,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:50:19,254 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:50:19,309 WARN L230 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+lh-reducer.c[8507,8520] [2022-03-17 19:50:19,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:50:19,329 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:50:19,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19 WrapperNode [2022-03-17 19:50:19,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:50:19,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:50:19,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:50:19,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:50:19,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19" (1/1) ... [2022-03-17 19:50:19,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19" (1/1) ... [2022-03-17 19:50:19,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19" (1/1) ... [2022-03-17 19:50:19,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19" (1/1) ... [2022-03-17 19:50:19,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19" (1/1) ... [2022-03-17 19:50:19,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19" (1/1) ... [2022-03-17 19:50:19,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19" (1/1) ... [2022-03-17 19:50:19,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:50:19,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:50:19,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:50:19,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:50:19,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19" (1/1) ... [2022-03-17 19:50:19,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:50:19,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:50:19,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 19:50:19,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 19:50:19,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:50:19,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:50:19,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:50:19,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:50:19,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:50:19,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:50:19,471 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:50:19,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:50:19,473 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-03-17 19:50:19,473 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-03-17 19:50:19,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:50:19,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:50:19,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 19:50:19,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:50:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-17 19:50:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:50:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:50:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:50:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:50:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-17 19:50:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:50:19,571 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:50:19,573 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:50:19,968 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:50:19,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:50:19,974 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-17 19:50:19,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:50:19 BoogieIcfgContainer [2022-03-17 19:50:19,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:50:19,976 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:50:19,976 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:50:19,977 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:50:19,979 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:50:19" (1/1) ... [2022-03-17 19:50:20,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:50:20 BasicIcfg [2022-03-17 19:50:20,002 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:50:20,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:50:20,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:50:20,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:50:20,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:50:18" (1/4) ... [2022-03-17 19:50:20,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79966a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:50:20, skipping insertion in model container [2022-03-17 19:50:20,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:19" (2/4) ... [2022-03-17 19:50:20,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79966a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:50:20, skipping insertion in model container [2022-03-17 19:50:20,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:50:19" (3/4) ... [2022-03-17 19:50:20,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79966a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:50:20, skipping insertion in model container [2022-03-17 19:50:20,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:50:20" (4/4) ... [2022-03-17 19:50:20,010 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.cqvasr [2022-03-17 19:50:20,013 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:50:20,014 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:50:20,053 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:50:20,060 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 19:50:20,061 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:50:20,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-03-17 19:50:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 19:50:20,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:50:20,075 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:50:20,075 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:50:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:50:20,079 INFO L85 PathProgramCache]: Analyzing trace with hash -29084800, now seen corresponding path program 1 times [2022-03-17 19:50:20,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:50:20,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838750763] [2022-03-17 19:50:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:20,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:50:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:20,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:50:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:20,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:50:20,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838750763] [2022-03-17 19:50:20,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838750763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:50:20,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:50:20,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 19:50:20,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169509768] [2022-03-17 19:50:20,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:50:20,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 19:50:20,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:50:20,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 19:50:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:50:20,457 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-03-17 19:50:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:50:20,545 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-03-17 19:50:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 19:50:20,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2022-03-17 19:50:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:50:20,552 INFO L225 Difference]: With dead ends: 38 [2022-03-17 19:50:20,552 INFO L226 Difference]: Without dead ends: 21 [2022-03-17 19:50:20,554 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-17 19:50:20,557 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:50:20,558 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:50:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-17 19:50:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-03-17 19:50:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2022-03-17 19:50:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-17 19:50:20,582 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2022-03-17 19:50:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:50:20,582 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-17 19:50:20,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-03-17 19:50:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-17 19:50:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 19:50:20,583 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:50:20,583 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:50:20,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:50:20,584 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:50:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:50:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1870263588, now seen corresponding path program 1 times [2022-03-17 19:50:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:50:20,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855495483] [2022-03-17 19:50:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:50:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:20,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:50:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:20,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:50:20,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855495483] [2022-03-17 19:50:20,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855495483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:50:20,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391179898] [2022-03-17 19:50:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:20,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:50:20,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:50:20,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:50:20,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:50:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:20,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 19:50:20,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:50:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:21,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:50:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:21,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391179898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:50:21,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:50:21,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-17 19:50:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111847109] [2022-03-17 19:50:21,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:50:21,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 19:50:21,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:50:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 19:50:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-17 19:50:21,084 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2022-03-17 19:50:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:50:21,254 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-03-17 19:50:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 19:50:21,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 17 [2022-03-17 19:50:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:50:21,255 INFO L225 Difference]: With dead ends: 38 [2022-03-17 19:50:21,255 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 19:50:21,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-17 19:50:21,257 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:50:21,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:50:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 19:50:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-17 19:50:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 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) [2022-03-17 19:50:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-03-17 19:50:21,262 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 17 [2022-03-17 19:50:21,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:50:21,262 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-03-17 19:50:21,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2022-03-17 19:50:21,262 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-03-17 19:50:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 19:50:21,263 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:50:21,263 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:50:21,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 19:50:21,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:50:21,464 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:50:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:50:21,464 INFO L85 PathProgramCache]: Analyzing trace with hash -595409280, now seen corresponding path program 2 times [2022-03-17 19:50:21,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:50:21,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526672775] [2022-03-17 19:50:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:21,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:50:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:21,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:50:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:50:21,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526672775] [2022-03-17 19:50:21,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526672775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:50:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394919079] [2022-03-17 19:50:21,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:50:21,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:50:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:50:21,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:50:21,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:50:21,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:50:21,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:50:21,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 19:50:21,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:50:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:21,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:50:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:22,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394919079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:50:22,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:50:22,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-17 19:50:22,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858682361] [2022-03-17 19:50:22,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:50:22,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 19:50:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:50:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 19:50:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-17 19:50:22,011 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 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) [2022-03-17 19:50:22,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:50:22,541 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-03-17 19:50:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 19:50:22,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 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 32 [2022-03-17 19:50:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:50:22,544 INFO L225 Difference]: With dead ends: 68 [2022-03-17 19:50:22,544 INFO L226 Difference]: Without dead ends: 65 [2022-03-17 19:50:22,545 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-03-17 19:50:22,547 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:50:22,548 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 100 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:50:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-17 19:50:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-03-17 19:50:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 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) [2022-03-17 19:50:22,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-03-17 19:50:22,566 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 32 [2022-03-17 19:50:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:50:22,567 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-03-17 19:50:22,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 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) [2022-03-17 19:50:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-03-17 19:50:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-17 19:50:22,570 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:50:22,570 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:50:22,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:50:22,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 19:50:22,772 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:50:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:50:22,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1106154240, now seen corresponding path program 3 times [2022-03-17 19:50:22,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:50:22,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630416645] [2022-03-17 19:50:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:22,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:50:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:22,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:50:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:22,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:50:22,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630416645] [2022-03-17 19:50:22,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630416645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:50:22,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034465399] [2022-03-17 19:50:22,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:50:22,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:50:22,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:50:22,992 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:50:22,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:50:23,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 19:50:23,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:50:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 19:50:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:50:23,363 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:50:23,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23