/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-05ce600 [2022-02-23 20:59:45,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:59:45,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:59:45,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:59:45,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:59:45,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:59:45,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:59:45,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:59:45,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:59:45,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:59:45,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:59:45,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:59:45,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:59:45,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:59:45,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:59:45,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:59:45,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:59:45,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:59:45,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:59:45,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:59:45,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:59:45,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:59:45,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:59:45,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:59:45,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 20:59:45,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 20:59:45,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 20:59:45,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 20:59:45,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 20:59:45,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-02-23 20:59:45,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:59:45,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:59:45,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:59:45,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 20:59:45,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:59:45,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:59:45,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:59:45,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:59:45,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:59:45,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:59:45,561 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:59:45,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:59:45,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:59:45,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:59:45,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:59:45,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:59:45,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:59:45,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:59:45,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:59:45,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:59:45,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:59:45,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:59:45,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:59:45,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:59:45,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:59:45,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:59:45,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:59:45,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:59:45,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:59:45,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:59:45,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:59:45,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:59:45,565 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:59:45,565 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:59:45,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:59:45,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:59:45,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:59:45,777 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:59:45,777 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:59:45,778 INFO L432 ainManager$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 [2022-02-23 20:59:45,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56d8952b2/11c46f17197548b288d09da2667186dd/FLAGe82a9db56 [2022-02-23 20:59:46,178 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:59:46,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2022-02-23 20:59:46,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56d8952b2/11c46f17197548b288d09da2667186dd/FLAGe82a9db56 [2022-02-23 20:59:46,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56d8952b2/11c46f17197548b288d09da2667186dd [2022-02-23 20:59:46,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:59:46,604 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:59:46,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:59:46,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:59:46,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:59:46,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:46,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d3911e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46, skipping insertion in model container [2022-02-23 20:59:46,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:46,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:59:46,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:59:46,893 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] [2022-02-23 20:59:46,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:59:46,911 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:59:46,956 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] [2022-02-23 20:59:46,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:59:46,967 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:59:46,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46 WrapperNode [2022-02-23 20:59:46,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:59:46,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:59:46,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:59:46,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:59:46,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:46,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:47,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:47,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:47,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:47,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:47,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:47,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:59:47,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:59:47,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:59:47,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:59:47,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46" (1/1) ... [2022-02-23 20:59:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:59:47,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:59:47,068 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) [2022-02-23 20:59:47,084 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 [2022-02-23 20:59:47,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:59:47,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:59:47,096 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:59:47,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:59:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:59:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:59:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:59:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:59:47,098 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-02-23 20:59:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-02-23 20:59:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:59:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-02-23 20:59:47,201 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:59:47,202 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:59:47,619 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:59:47,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:59:47,623 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-23 20:59:47,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:59:47 BoogieIcfgContainer [2022-02-23 20:59:47,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:59:47,625 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:59:47,625 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:59:47,627 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:59:47,629 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:59:47" (1/1) ... [2022-02-23 20:59:47,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:59:47 BasicIcfg [2022-02-23 20:59:47,649 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:59:47,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:59:47,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:59:47,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:59:47,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:59:46" (1/4) ... [2022-02-23 20:59:47,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9f42ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:59:47, skipping insertion in model container [2022-02-23 20:59:47,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:59:46" (2/4) ... [2022-02-23 20:59:47,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9f42ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:59:47, skipping insertion in model container [2022-02-23 20:59:47,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:59:47" (3/4) ... [2022-02-23 20:59:47,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9f42ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:59:47, skipping insertion in model container [2022-02-23 20:59:47,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:59:47" (4/4) ... [2022-02-23 20:59:47,657 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.cqvasr [2022-02-23 20:59:47,661 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:59:47,661 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:59:47,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:59:47,706 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 20:59:47,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:59:47,716 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) [2022-02-23 20:59:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 20:59:47,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:59:47,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:59:47,720 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:59:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:59:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash -29084800, now seen corresponding path program 1 times [2022-02-23 20:59:47,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:59:47,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597731863] [2022-02-23 20:59:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:59:47,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:59:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:59:48,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:59:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:59:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:59:48,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:59:48,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597731863] [2022-02-23 20:59:48,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597731863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:59:48,056 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:59:48,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 20:59:48,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365261571] [2022-02-23 20:59:48,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:59:48,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 20:59:48,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:59:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 20:59:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 20:59:48,080 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) [2022-02-23 20:59:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:59:48,167 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-02-23 20:59:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 20:59:48,169 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 [2022-02-23 20:59:48,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:59:48,175 INFO L225 Difference]: With dead ends: 38 [2022-02-23 20:59:48,175 INFO L226 Difference]: Without dead ends: 21 [2022-02-23 20:59:48,177 INFO L932 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 [2022-02-23 20:59:48,180 INFO L933 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 [2022-02-23 20:59:48,182 INFO L934 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] [2022-02-23 20:59:48,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-23 20:59:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-02-23 20:59:48,201 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) [2022-02-23 20:59:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-02-23 20:59:48,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2022-02-23 20:59:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:59:48,203 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-02-23 20:59:48,203 INFO L471 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) [2022-02-23 20:59:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-02-23 20:59:48,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 20:59:48,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:59:48,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:59:48,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:59:48,205 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:59:48,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:59:48,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1870263588, now seen corresponding path program 1 times [2022-02-23 20:59:48,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:59:48,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993074097] [2022-02-23 20:59:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:59:48,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:59:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:59:48,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:59:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:59:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:59:48,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:59:48,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993074097] [2022-02-23 20:59:48,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993074097] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:59:48,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685373345] [2022-02-23 20:59:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:59:48,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:59:48,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:59:48,316 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) [2022-02-23 20:59:48,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 20:59:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:59:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 20:59:48,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:59:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:59:48,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:59:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:59:48,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685373345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:59:48,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:59:48,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-23 20:59:48,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764233512] [2022-02-23 20:59:48,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:59:48,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 20:59:48,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:59:48,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 20:59:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:59:48,760 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) [2022-02-23 20:59:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:59:48,947 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-02-23 20:59:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 20:59:48,947 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 [2022-02-23 20:59:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:59:48,948 INFO L225 Difference]: With dead ends: 38 [2022-02-23 20:59:48,948 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 20:59:48,948 INFO L932 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 [2022-02-23 20:59:48,949 INFO L933 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 [2022-02-23 20:59:48,950 INFO L934 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] [2022-02-23 20:59:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 20:59:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-02-23 20:59:48,953 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) [2022-02-23 20:59:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-02-23 20:59:48,954 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 17 [2022-02-23 20:59:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:59:48,954 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-02-23 20:59:48,954 INFO L471 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) [2022-02-23 20:59:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-02-23 20:59:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 20:59:48,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:59:48,955 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:59:48,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 20:59:49,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:59:49,156 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:59:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:59:49,157 INFO L85 PathProgramCache]: Analyzing trace with hash -595409280, now seen corresponding path program 2 times [2022-02-23 20:59:49,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:59:49,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606328105] [2022-02-23 20:59:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:59:49,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:59:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:59:49,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:59:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:59:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:59:49,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:59:49,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606328105] [2022-02-23 20:59:49,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606328105] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:59:49,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033858692] [2022-02-23 20:59:49,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 20:59:49,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:59:49,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:59:49,321 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) [2022-02-23 20:59:49,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 20:59:49,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 20:59:49,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:59:49,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 20:59:49,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:59:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:59:49,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:59:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:59:49,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033858692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:59:49,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:59:49,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-02-23 20:59:49,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177294672] [2022-02-23 20:59:49,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:59:49,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 20:59:49,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:59:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 20:59:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-02-23 20:59:49,793 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) [2022-02-23 20:59:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:59:50,327 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-02-23 20:59:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 20:59:50,327 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 [2022-02-23 20:59:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:59:50,328 INFO L225 Difference]: With dead ends: 68 [2022-02-23 20:59:50,328 INFO L226 Difference]: Without dead ends: 65 [2022-02-23 20:59:50,329 INFO L932 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 [2022-02-23 20:59:50,329 INFO L933 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 [2022-02-23 20:59:50,330 INFO L934 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] [2022-02-23 20:59:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-23 20:59:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-02-23 20:59:50,334 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) [2022-02-23 20:59:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-02-23 20:59:50,351 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 32 [2022-02-23 20:59:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:59:50,352 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-02-23 20:59:50,352 INFO L471 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) [2022-02-23 20:59:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-02-23 20:59:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-23 20:59:50,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:59:50,353 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:59:50,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 20:59:50,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 20:59:50,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:59:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:59:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1106154240, now seen corresponding path program 3 times [2022-02-23 20:59:50,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:59:50,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667713184] [2022-02-23 20:59:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:59:50,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:59:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:59:50,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:59:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:59:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:59:50,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:59:50,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667713184] [2022-02-23 20:59:50,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667713184] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:59:50,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387620038] [2022-02-23 20:59:50,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 20:59:50,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:59:50,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:59:50,780 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) [2022-02-23 20:59:50,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 20:59:51,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 20:59:51,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:59:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 20:59:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:59:51,297 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 20:59:51,298 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