/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/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:20:19,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:20:19,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:20:19,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:20:19,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:20:19,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:20:19,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:20:19,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:20:19,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:20:19,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:20:19,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:20:19,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:20:19,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:20:19,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:20:19,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:20:19,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:20:19,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:20:19,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:20:19,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:20:19,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:20:19,175 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:20:19,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:20:19,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:20:19,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:20:19,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:20:19,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 19:20:19,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 19:20:19,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 19:20:19,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 19:20:19,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 19:20:19,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-17 19:20:19,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:20:19,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:20:19,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:20:19,186 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 19:20:19,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:20:19,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:20:19,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:20:19,211 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:20:19,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:20:19,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:20:19,212 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:20:19,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:20:19,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:20:19,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:20:19,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:20:19,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:20:19,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:20:19,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:20:19,213 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:20:19,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:20:19,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:20:19,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:20:19,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:20:19,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:20:19,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:20:19,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:20:19,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:20:19,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:20:19,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:20:19,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:20:19,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:20:19,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:20:19,215 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:20:19,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:20:19,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:20:19,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:20:19,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:20:19,413 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:20:19,413 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:20:19,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2022-03-17 19:20:19,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1d139e7b/8f88731f660845cf951eaa43f2642f65/FLAGfc1362a11 [2022-03-17 19:20:19,817 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:20:19,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2022-03-17 19:20:19,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1d139e7b/8f88731f660845cf951eaa43f2642f65/FLAGfc1362a11 [2022-03-17 19:20:20,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1d139e7b/8f88731f660845cf951eaa43f2642f65 [2022-03-17 19:20:20,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:20:20,266 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:20:20,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:20:20,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:20:20,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:20:20,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442c2515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20, skipping insertion in model container [2022-03-17 19:20:20,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:20:20,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:20:20,408 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c[383,396] [2022-03-17 19:20:20,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:20:20,433 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:20:20,440 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c[383,396] [2022-03-17 19:20:20,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:20:20,464 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:20:20,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20 WrapperNode [2022-03-17 19:20:20,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:20:20,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:20:20,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:20:20,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:20:20,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:20:20,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:20:20,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:20:20,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:20:20,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:20:20,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:20,546 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 19:20:20,566 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 19:20:20,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:20:20,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:20:20,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:20:20,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:20:20,580 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2022-03-17 19:20:20,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:20:20,580 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-17 19:20:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:20:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:20:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:20:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:20:20,630 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:20:20,631 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:20:20,777 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:20:20,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:20:20,781 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 19:20:20,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:20 BoogieIcfgContainer [2022-03-17 19:20:20,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:20:20,783 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:20:20,783 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:20:20,784 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:20:20,786 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:20" (1/1) ... [2022-03-17 19:20:20,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:20:20 BasicIcfg [2022-03-17 19:20:20,799 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:20:20,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:20:20,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:20:20,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:20:20,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:20:20" (1/4) ... [2022-03-17 19:20:20,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495cf5bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:20:20, skipping insertion in model container [2022-03-17 19:20:20,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:20" (2/4) ... [2022-03-17 19:20:20,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495cf5bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:20:20, skipping insertion in model container [2022-03-17 19:20:20,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:20" (3/4) ... [2022-03-17 19:20:20,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495cf5bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:20:20, skipping insertion in model container [2022-03-17 19:20:20,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:20:20" (4/4) ... [2022-03-17 19:20:20,806 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.cqvasr [2022-03-17 19:20:20,809 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:20:20,810 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:20:20,845 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:20:20,850 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 19:20:20,850 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:20:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 19:20:20,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 19:20:20,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:20,864 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:20,865 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash -679551393, now seen corresponding path program 1 times [2022-03-17 19:20:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:20,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778646519] [2022-03-17 19:20:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:20,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 19:20:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 19:20:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,131 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 19:20:21,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778646519] [2022-03-17 19:20:21,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778646519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:20:21,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:20:21,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 19:20:21,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716014966] [2022-03-17 19:20:21,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:20:21,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:20:21,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:21,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:20:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 19:20:21,161 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 19:20:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:21,264 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-03-17 19:20:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 19:20:21,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-17 19:20:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:21,274 INFO L225 Difference]: With dead ends: 51 [2022-03-17 19:20:21,274 INFO L226 Difference]: Without dead ends: 26 [2022-03-17 19:20:21,277 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:20:21,280 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:21,281 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:20:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-17 19:20:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-17 19:20:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:20:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-03-17 19:20:21,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2022-03-17 19:20:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:21,311 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-03-17 19:20:21,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 19:20:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-03-17 19:20:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 19:20:21,313 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:21,313 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:21,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:20:21,313 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1069263323, now seen corresponding path program 1 times [2022-03-17 19:20:21,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:21,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663043185] [2022-03-17 19:20:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:21,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 19:20:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 19:20:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,498 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 19:20:21,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:21,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663043185] [2022-03-17 19:20:21,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663043185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:20:21,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:20:21,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 19:20:21,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219619900] [2022-03-17 19:20:21,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:20:21,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 19:20:21,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:21,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 19:20:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-17 19:20:21,507 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 19:20:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:21,659 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-03-17 19:20:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 19:20:21,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-03-17 19:20:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:21,664 INFO L225 Difference]: With dead ends: 34 [2022-03-17 19:20:21,664 INFO L226 Difference]: Without dead ends: 26 [2022-03-17 19:20:21,665 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-17 19:20:21,666 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:21,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:20:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-17 19:20:21,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-17 19:20:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:20:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-17 19:20:21,698 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2022-03-17 19:20:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:21,698 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-17 19:20:21,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 19:20:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-17 19:20:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 19:20:21,700 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:21,700 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:21,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:20:21,700 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:21,701 INFO L85 PathProgramCache]: Analyzing trace with hash 673547012, now seen corresponding path program 1 times [2022-03-17 19:20:21,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:21,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171139530] [2022-03-17 19:20:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:21,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 19:20:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 19:20:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:21,945 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 19:20:21,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:21,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171139530] [2022-03-17 19:20:21,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171139530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:20:21,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:20:21,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-17 19:20:21,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059766953] [2022-03-17 19:20:21,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:20:21,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 19:20:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:21,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 19:20:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-17 19:20:21,952 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 19:20:24,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-17 19:20:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:24,390 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-17 19:20:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 19:20:24,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-17 19:20:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:24,391 INFO L225 Difference]: With dead ends: 39 [2022-03-17 19:20:24,391 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 19:20:24,392 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-17 19:20:24,392 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:24,392 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 37 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 19:20:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 19:20:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-17 19:20:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:20:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-17 19:20:24,398 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-03-17 19:20:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:24,398 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-17 19:20:24,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 19:20:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-17 19:20:24,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 19:20:24,399 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:24,399 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:24,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 19:20:24,399 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:24,399 INFO L85 PathProgramCache]: Analyzing trace with hash -977632473, now seen corresponding path program 1 times [2022-03-17 19:20:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:24,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244079227] [2022-03-17 19:20:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:24,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:24,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 19:20:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:24,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 19:20:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:24,705 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 19:20:24,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:24,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244079227] [2022-03-17 19:20:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244079227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:20:24,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248512592] [2022-03-17 19:20:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:24,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:24,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:24,716 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 19:20:24,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process