/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/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 20:29:33,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:29:33,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:29:33,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:29:33,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:29:33,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:29:33,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:29:33,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:29:33,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:29:33,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:29:33,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:29:33,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:29:33,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:29:33,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:29:33,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:29:33,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:29:33,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:29:33,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:29:33,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:29:33,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:29:33,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:29:33,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:29:33,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:29:33,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:29:33,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 20:29:33,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 20:29:33,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 20:29:33,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 20:29:33,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 20:29:33,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-23 20:29:33,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 20:29:33,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 20:29:33,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 20:29:33,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 20:29:33,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 20:29:33,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 20:29:33,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 20:29:33,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 20:29:33,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:29:33,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:29:33,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:29:33,431 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 20:29:33,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:29:33,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:29:33,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:29:33,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:29:33,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:29:33,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:29:33,461 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:29:33,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:29:33,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:29:33,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:29:33,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:29:33,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:29:33,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:29:33,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:29:33,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:29:33,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:29:33,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:29:33,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:29:33,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:29:33,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:29:33,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:29:33,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:29:33,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:29:33,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:29:33,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:29:33,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:29:33,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:29:33,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:29:33,466 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:29:33,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:29:33,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:29:33,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:29:33,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:29:33,706 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:29:33,708 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:29:33,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-23 20:29:33,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ed859eeb/ab8521707a9e4484a7b1ef462804fe6e/FLAG6340b720b [2022-02-23 20:29:34,124 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:29:34,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-23 20:29:34,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ed859eeb/ab8521707a9e4484a7b1ef462804fe6e/FLAG6340b720b [2022-02-23 20:29:34,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ed859eeb/ab8521707a9e4484a7b1ef462804fe6e [2022-02-23 20:29:34,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:29:34,560 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:29:34,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:29:34,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:29:34,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:29:34,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1e4bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34, skipping insertion in model container [2022-02-23 20:29:34,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:29:34,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:29:34,737 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/insertion_sort-1.c[328,341] [2022-02-23 20:29:34,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:29:34,762 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:29:34,772 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/insertion_sort-1.c[328,341] [2022-02-23 20:29:34,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:29:34,790 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:29:34,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34 WrapperNode [2022-02-23 20:29:34,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:29:34,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:29:34,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:29:34,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:29:34,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:29:34,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:29:34,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:29:34,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:29:34,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:29:34,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:34,851 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 20:29:34,856 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 20:29:34,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:29:34,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:29:34,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:29:34,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 20:29:34,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:29:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:29:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:29:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:29:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:29:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:29:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 20:29:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 20:29:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:29:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-23 20:29:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:29:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:29:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:29:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:29:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:29:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:29:34,961 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:29:34,963 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:29:35,105 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:29:35,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:29:35,113 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-23 20:29:35,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:29:35 BoogieIcfgContainer [2022-02-23 20:29:35,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:29:35,115 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:29:35,116 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:29:35,117 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:29:35,120 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:29:35" (1/1) ... [2022-02-23 20:29:35,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:29:35 BasicIcfg [2022-02-23 20:29:35,149 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:29:35,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:29:35,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:29:35,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:29:35,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:29:34" (1/4) ... [2022-02-23 20:29:35,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2b5f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:29:35, skipping insertion in model container [2022-02-23 20:29:35,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (2/4) ... [2022-02-23 20:29:35,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2b5f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:29:35, skipping insertion in model container [2022-02-23 20:29:35,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:29:35" (3/4) ... [2022-02-23 20:29:35,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2b5f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:29:35, skipping insertion in model container [2022-02-23 20:29:35,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:29:35" (4/4) ... [2022-02-23 20:29:35,157 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.cqvasr [2022-02-23 20:29:35,161 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:29:35,162 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:29:35,225 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:29:35,236 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 20:29:35,236 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:29:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-23 20:29:35,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:35,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:35,272 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:35,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1926103570, now seen corresponding path program 1 times [2022-02-23 20:29:35,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:35,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847915870] [2022-02-23 20:29:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:35,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,480 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 20:29:35,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:35,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847915870] [2022-02-23 20:29:35,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847915870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:35,484 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:35,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 20:29:35,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121973053] [2022-02-23 20:29:35,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:35,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 20:29:35,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 20:29:35,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 20:29:35,528 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 20:29:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:35,573 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2022-02-23 20:29:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 20:29:35,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 15 [2022-02-23 20:29:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:35,579 INFO L225 Difference]: With dead ends: 58 [2022-02-23 20:29:35,579 INFO L226 Difference]: Without dead ends: 28 [2022-02-23 20:29:35,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 20:29:35,584 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:35,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:29:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-23 20:29:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-23 20:29:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 20:29:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-02-23 20:29:35,621 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2022-02-23 20:29:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:35,621 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-02-23 20:29:35,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 20:29:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-02-23 20:29:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-23 20:29:35,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:35,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:35,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:29:35,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1448912944, now seen corresponding path program 1 times [2022-02-23 20:29:35,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:35,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235611288] [2022-02-23 20:29:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:35,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,787 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 20:29:35,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:35,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235611288] [2022-02-23 20:29:35,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235611288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:35,788 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:35,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 20:29:35,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404957309] [2022-02-23 20:29:35,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:35,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 20:29:35,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 20:29:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-23 20:29:35,790 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 20:29:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:35,990 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-02-23 20:29:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:29:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 15 [2022-02-23 20:29:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:35,992 INFO L225 Difference]: With dead ends: 53 [2022-02-23 20:29:35,992 INFO L226 Difference]: Without dead ends: 30 [2022-02-23 20:29:35,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:29:36,001 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:36,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:29:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-23 20:29:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-23 20:29:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 20:29:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-02-23 20:29:36,020 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-02-23 20:29:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:36,020 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-02-23 20:29:36,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 20:29:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-02-23 20:29:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 20:29:36,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:36,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:36,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 20:29:36,022 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:36,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:36,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1246349198, now seen corresponding path program 1 times [2022-02-23 20:29:36,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:36,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810190475] [2022-02-23 20:29:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:36,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:36,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:36,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810190475] [2022-02-23 20:29:36,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810190475] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:36,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252862143] [2022-02-23 20:29:36,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:36,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:36,183 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 20:29:36,213 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 20:29:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 20:29:36,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:29:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 20:29:36,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 20:29:36,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252862143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:36,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 20:29:36,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-02-23 20:29:36,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196457520] [2022-02-23 20:29:36,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:36,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 20:29:36,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 20:29:36,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 20:29:36,443 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 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 20:29:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:36,493 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-02-23 20:29:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 20:29:36,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 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 20:29:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:36,495 INFO L225 Difference]: With dead ends: 49 [2022-02-23 20:29:36,495 INFO L226 Difference]: Without dead ends: 37 [2022-02-23 20:29:36,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:29:36,499 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:36,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 105 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:29:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-23 20:29:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-02-23 20:29:36,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 20:29:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-02-23 20:29:36,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2022-02-23 20:29:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:36,512 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-02-23 20:29:36,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 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 20:29:36,513 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-02-23 20:29:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 20:29:36,515 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:36,516 INFO L514 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] [2022-02-23 20:29:36,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 20:29:36,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:36,736 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:36,736 INFO L85 PathProgramCache]: Analyzing trace with hash 931318849, now seen corresponding path program 1 times [2022-02-23 20:29:36,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:36,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808403898] [2022-02-23 20:29:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:36,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:36,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:36,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808403898] [2022-02-23 20:29:36,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808403898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:36,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048723006] [2022-02-23 20:29:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:36,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:36,920 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 20:29:36,922 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 20:29:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 20:29:36,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:29:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:37,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:29:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:37,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048723006] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:29:37,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:29:37,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-02-23 20:29:37,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103838353] [2022-02-23 20:29:37,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:29:37,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 20:29:37,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 20:29:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-23 20:29:37,235 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:37,439 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-02-23 20:29:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:29:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-23 20:29:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:37,440 INFO L225 Difference]: With dead ends: 61 [2022-02-23 20:29:37,440 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 20:29:37,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-02-23 20:29:37,441 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:37,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 63 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 20:29:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 20:29:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-02-23 20:29:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 20:29:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-02-23 20:29:37,446 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 23 [2022-02-23 20:29:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:37,446 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-02-23 20:29:37,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-02-23 20:29:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 20:29:37,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:37,447 INFO L514 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] [2022-02-23 20:29:37,471 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 20:29:37,648 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,SelfDestructingSolverStorable3 [2022-02-23 20:29:37,648 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1459507809, now seen corresponding path program 2 times [2022-02-23 20:29:37,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:37,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638620588] [2022-02-23 20:29:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:37,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:38,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:38,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:38,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638620588] [2022-02-23 20:29:38,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638620588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:38,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029552314] [2022-02-23 20:29:38,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 20:29:38,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:38,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:38,178 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 20:29:38,180 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 20:29:38,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 20:29:38,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:29:38,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 20:29:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:29:38,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-23 20:29:38,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-23 20:29:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:29:38,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-02-23 20:29:38,572 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 20:29:38,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-02-23 20:29:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:38,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:29:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:38,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029552314] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:38,974 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-23 20:29:38,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16, 15] total 31 [2022-02-23 20:29:38,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221878490] [2022-02-23 20:29:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:38,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 20:29:38,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 20:29:38,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-02-23 20:29:38,976 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 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 20:29:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:39,073 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-02-23 20:29:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 20:29:39,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-23 20:29:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:39,075 INFO L225 Difference]: With dead ends: 49 [2022-02-23 20:29:39,075 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 20:29:39,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-02-23 20:29:39,076 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:39,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 175 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-02-23 20:29:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 20:29:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-02-23 20:29:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 38 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-02-23 20:29:39,087 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2022-02-23 20:29:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:39,087 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-02-23 20:29:39,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 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 20:29:39,088 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-02-23 20:29:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 20:29:39,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:39,088 INFO L514 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] [2022-02-23 20:29:39,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 20:29:39,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:39,289 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1038508128, now seen corresponding path program 1 times [2022-02-23 20:29:39,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:39,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140053243] [2022-02-23 20:29:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:39,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:39,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:39,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:39,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140053243] [2022-02-23 20:29:39,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140053243] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:39,365 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:39,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 20:29:39,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484279517] [2022-02-23 20:29:39,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:39,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 20:29:39,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 20:29:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 20:29:39,367 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 20:29:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:39,455 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2022-02-23 20:29:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 20:29:39,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-23 20:29:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:39,457 INFO L225 Difference]: With dead ends: 78 [2022-02-23 20:29:39,458 INFO L226 Difference]: Without dead ends: 59 [2022-02-23 20:29:39,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-23 20:29:39,459 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:39,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 36 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:29:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-23 20:29:39,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-02-23 20:29:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-02-23 20:29:39,472 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 25 [2022-02-23 20:29:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:39,472 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-02-23 20:29:39,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 20:29:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-02-23 20:29:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 20:29:39,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:39,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:39,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-23 20:29:39,474 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1031689277, now seen corresponding path program 1 times [2022-02-23 20:29:39,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:39,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014838579] [2022-02-23 20:29:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:39,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:39,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:39,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:39,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014838579] [2022-02-23 20:29:39,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014838579] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:39,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940239074] [2022-02-23 20:29:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:39,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:39,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:39,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:29:39,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 20:29:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:39,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 20:29:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:29:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:39,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:29:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:39,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940239074] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:29:39,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:29:39,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-02-23 20:29:39,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755435333] [2022-02-23 20:29:39,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:29:39,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 20:29:39,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 20:29:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:29:39,749 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:39,949 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2022-02-23 20:29:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 20:29:39,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-23 20:29:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:39,951 INFO L225 Difference]: With dead ends: 91 [2022-02-23 20:29:39,951 INFO L226 Difference]: Without dead ends: 72 [2022-02-23 20:29:39,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-02-23 20:29:39,952 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:39,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 57 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:29:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-23 20:29:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2022-02-23 20:29:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 46 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-02-23 20:29:39,964 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 30 [2022-02-23 20:29:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:39,964 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-02-23 20:29:39,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-02-23 20:29:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 20:29:39,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:39,965 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2022-02-23 20:29:39,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-23 20:29:40,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:40,188 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash -765262082, now seen corresponding path program 1 times [2022-02-23 20:29:40,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:40,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676846838] [2022-02-23 20:29:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:40,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:40,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676846838] [2022-02-23 20:29:40,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676846838] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:40,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198068816] [2022-02-23 20:29:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:40,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:40,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:40,581 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:29:40,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 20:29:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:40,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 20:29:40,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:29:40,837 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-02-23 20:29:40,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-02-23 20:29:41,088 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-02-23 20:29:41,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-02-23 20:29:41,288 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-02-23 20:29:41,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-02-23 20:29:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:41,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:29:41,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2022-02-23 20:29:41,892 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-02-23 20:29:41,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 771 treesize of output 711 [2022-02-23 20:29:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:43,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198068816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:29:43,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:29:43,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 14] total 42 [2022-02-23 20:29:43,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153251893] [2022-02-23 20:29:43,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:29:43,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-23 20:29:43,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-23 20:29:43,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1533, Unknown=2, NotChecked=0, Total=1722 [2022-02-23 20:29:43,500 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 42 states, 40 states have (on average 1.575) internal successors, (63), 39 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:52,541 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2022-02-23 20:29:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-23 20:29:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.575) internal successors, (63), 39 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-23 20:29:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:52,543 INFO L225 Difference]: With dead ends: 105 [2022-02-23 20:29:52,543 INFO L226 Difference]: Without dead ends: 103 [2022-02-23 20:29:52,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=500, Invalid=4189, Unknown=3, NotChecked=0, Total=4692 [2022-02-23 20:29:52,546 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 107 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:52,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 163 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 644 Invalid, 0 Unknown, 370 Unchecked, 0.4s Time] [2022-02-23 20:29:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-23 20:29:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 60. [2022-02-23 20:29:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 53 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-02-23 20:29:52,561 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 30 [2022-02-23 20:29:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:52,563 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-02-23 20:29:52,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.575) internal successors, (63), 39 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-02-23 20:29:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 20:29:52,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:52,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:52,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 20:29:52,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:52,792 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:52,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1650775123, now seen corresponding path program 1 times [2022-02-23 20:29:52,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:52,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847823352] [2022-02-23 20:29:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:52,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:52,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:52,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:52,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847823352] [2022-02-23 20:29:52,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847823352] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:52,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002592854] [2022-02-23 20:29:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:52,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:52,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:52,855 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:29:52,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 20:29:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:52,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 20:29:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:29:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:52,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:29:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:29:53,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002592854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:29:53,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:29:53,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-02-23 20:29:53,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505933618] [2022-02-23 20:29:53,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:29:53,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 20:29:53,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 20:29:53,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:29:53,037 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:53,300 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2022-02-23 20:29:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 20:29:53,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-23 20:29:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:53,302 INFO L225 Difference]: With dead ends: 132 [2022-02-23 20:29:53,302 INFO L226 Difference]: Without dead ends: 98 [2022-02-23 20:29:53,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-02-23 20:29:53,303 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 148 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:53,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 45 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:29:53,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-23 20:29:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2022-02-23 20:29:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-02-23 20:29:53,312 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 31 [2022-02-23 20:29:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:53,312 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-02-23 20:29:53,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-02-23 20:29:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 20:29:53,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:53,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2022-02-23 20:29:53,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 20:29:53,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:53,527 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash -547485170, now seen corresponding path program 1 times [2022-02-23 20:29:53,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:53,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075595761] [2022-02-23 20:29:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:53,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:53,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:53,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-23 20:29:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 20:29:53,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:53,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075595761] [2022-02-23 20:29:53,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075595761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:53,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215403539] [2022-02-23 20:29:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:53,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:53,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:29:53,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 20:29:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:53,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 20:29:53,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:29:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 20:29:53,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:29:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 20:29:54,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215403539] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:29:54,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:29:54,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-02-23 20:29:54,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863572232] [2022-02-23 20:29:54,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:29:54,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 20:29:54,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 20:29:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-23 20:29:54,033 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:54,368 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2022-02-23 20:29:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 20:29:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-02-23 20:29:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:54,369 INFO L225 Difference]: With dead ends: 160 [2022-02-23 20:29:54,369 INFO L226 Difference]: Without dead ends: 95 [2022-02-23 20:29:54,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-02-23 20:29:54,370 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 126 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:54,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 69 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 20:29:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-23 20:29:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2022-02-23 20:29:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2022-02-23 20:29:54,379 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 33 [2022-02-23 20:29:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:54,380 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2022-02-23 20:29:54,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2022-02-23 20:29:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-23 20:29:54,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:54,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:54,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 20:29:54,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:54,604 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:54,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1553999756, now seen corresponding path program 2 times [2022-02-23 20:29:54,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:54,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172230145] [2022-02-23 20:29:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:54,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 20:29:54,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:54,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172230145] [2022-02-23 20:29:54,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172230145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:54,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254764859] [2022-02-23 20:29:54,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 20:29:54,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:54,918 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:29:54,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 20:29:54,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 20:29:54,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:29:54,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-23 20:29:54,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:29:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:29:55,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-02-23 20:29:55,298 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 20:29:55,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-02-23 20:29:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-23 20:29:55,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:29:56,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-23 20:29:56,429 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-02-23 20:29:56,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-02-23 20:29:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-23 20:29:56,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254764859] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:29:56,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:29:56,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 32 [2022-02-23 20:29:56,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580641261] [2022-02-23 20:29:56,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:29:56,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-23 20:29:56,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:56,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-23 20:29:56,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-23 20:29:56,573 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:58,117 INFO L93 Difference]: Finished difference Result 211 states and 257 transitions. [2022-02-23 20:29:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-23 20:29:58,118 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-23 20:29:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:58,119 INFO L225 Difference]: With dead ends: 211 [2022-02-23 20:29:58,119 INFO L226 Difference]: Without dead ends: 174 [2022-02-23 20:29:58,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1045, Invalid=5117, Unknown=0, NotChecked=0, Total=6162 [2022-02-23 20:29:58,121 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:58,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 85 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 915 Invalid, 0 Unknown, 101 Unchecked, 0.6s Time] [2022-02-23 20:29:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-23 20:29:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 84. [2022-02-23 20:29:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-02-23 20:29:58,132 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 38 [2022-02-23 20:29:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:58,132 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-02-23 20:29:58,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-02-23 20:29:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-23 20:29:58,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:58,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:58,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 20:29:58,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 20:29:58,352 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1626243309, now seen corresponding path program 2 times [2022-02-23 20:29:58,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:58,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045707217] [2022-02-23 20:29:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:58,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:58,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:58,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045707217] [2022-02-23 20:29:58,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045707217] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:58,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444040998] [2022-02-23 20:29:58,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 20:29:58,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:58,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:58,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:29:58,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 20:29:59,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 20:29:59,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:29:59,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 20:29:59,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:29:59,204 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-02-23 20:29:59,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-02-23 20:29:59,472 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-02-23 20:29:59,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-02-23 20:29:59,790 INFO L356 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2022-02-23 20:29:59,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-02-23 20:29:59,996 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-02-23 20:29:59,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-02-23 20:30:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-23 20:30:00,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:30:14,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-02-23 20:30:14,771 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-02-23 20:30:14,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5803 treesize of output 5609 [2022-02-23 20:30:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 11 refuted. 1 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-23 20:30:54,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444040998] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:30:54,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:30:54,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 18] total 53 [2022-02-23 20:30:54,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454858707] [2022-02-23 20:30:54,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:30:54,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-23 20:30:54,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:30:54,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-23 20:30:54,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2448, Unknown=16, NotChecked=0, Total=2756 [2022-02-23 20:30:54,656 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 53 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 50 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:31:08,492 WARN L232 SmtUtils]: Spent 7.14s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 20:31:19,668 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 4))) (let ((.cse3 (+ .cse1 |c_main_~#v~0.offset| 4)) (.cse4 (+ |c_main_~#v~0.offset| 4))) (and (or (<= 1 c_main_~i~0) (let ((.cse0 (* c_main_~j~0 4))) (and (not (= .cse0 0)) (not (= (+ .cse0 4) 0)) (= .cse1 0))) (not |c_main_#t~short10|)) (= |c_#NULL.base| |c_old(#NULL.base)|) (forall ((v_main_~i~0_29 Int)) (or (<= 0 v_main_~i~0_29) (forall ((v_ArrVal_198 Int) (v_ArrVal_195 Int)) (or (let ((.cse2 (store (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_29 4) 4) v_ArrVal_195) (+ |c_main_~#v~0.offset| (* c_main_~j~0 4) 4) v_ArrVal_198))) (<= (select .cse2 |c_main_~#v~0.offset|) (select .cse2 (+ |c_main_~#v~0.offset| 4)))) (not (<= v_ArrVal_195 c_main_~key~0)))) (not (<= c_main_~i~0 (+ v_main_~i~0_29 1))))) (not (= .cse3 0)) (not (= .cse3 .cse4)) (= |c_main_~#v~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (let ((.cse5 (select |c_#memory_int| |c_main_~#v~0.base|))) (<= (+ (select .cse5 0) 1) (select .cse5 .cse4)))))) is different from false [2022-02-23 20:31:37,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:31:37,290 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-02-23 20:31:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-23 20:31:37,291 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 50 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-23 20:31:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:31:37,291 INFO L225 Difference]: With dead ends: 115 [2022-02-23 20:31:37,292 INFO L226 Difference]: Without dead ends: 113 [2022-02-23 20:31:37,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 72.9s TimeCoverageRelationStatistics Valid=800, Invalid=6651, Unknown=35, NotChecked=170, Total=7656 [2022-02-23 20:31:37,294 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 106 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 20:31:37,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 154 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 643 Invalid, 0 Unknown, 577 Unchecked, 0.4s Time] [2022-02-23 20:31:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-23 20:31:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2022-02-23 20:31:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:31:37,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-02-23 20:31:37,304 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 38 [2022-02-23 20:31:37,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:31:37,304 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-02-23 20:31:37,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 50 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:31:37,304 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-02-23 20:31:37,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 20:31:37,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:31:37,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:31:37,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-23 20:31:37,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:31:37,519 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:31:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:31:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1062518689, now seen corresponding path program 2 times [2022-02-23 20:31:37,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:31:37,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639932820] [2022-02-23 20:31:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:31:37,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:31:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:31:37,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:31:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:31:37,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-23 20:31:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:31:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:31:37,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:31:37,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639932820] [2022-02-23 20:31:37,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639932820] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:31:37,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218903612] [2022-02-23 20:31:37,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 20:31:37,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:31:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:31:37,784 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:31:37,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 20:31:37,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 20:31:37,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:31:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 20:31:37,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:31:37,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-02-23 20:31:38,020 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-02-23 20:31:38,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-02-23 20:31:40,057 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ 8 |v_main_~#v~0.offset_BEFORE_CALL_1|))))) is different from true [2022-02-23 20:31:40,135 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-23 20:31:40,135 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 34 treesize of output 10 [2022-02-23 20:31:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-02-23 20:31:40,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:31:42,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2022-02-23 20:31:42,544 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-02-23 20:31:42,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 903 treesize of output 848 [2022-02-23 20:31:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-23 20:31:43,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218903612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:31:43,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:31:43,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 31 [2022-02-23 20:31:43,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218257346] [2022-02-23 20:31:43,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:31:43,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-23 20:31:43,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:31:43,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-23 20:31:43,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=774, Unknown=1, NotChecked=56, Total=930 [2022-02-23 20:31:43,142 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 31 states, 30 states have (on average 2.2) internal successors, (66), 28 states have internal predecessors, (66), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 20:32:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:32:16,099 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2022-02-23 20:32:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-23 20:32:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 28 states have internal predecessors, (66), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-02-23 20:32:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:32:16,100 INFO L225 Difference]: With dead ends: 129 [2022-02-23 20:32:16,100 INFO L226 Difference]: Without dead ends: 127 [2022-02-23 20:32:16,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=294, Invalid=2346, Unknown=16, NotChecked=100, Total=2756 [2022-02-23 20:32:16,102 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 138 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 20:32:16,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 108 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 590 Invalid, 0 Unknown, 339 Unchecked, 0.4s Time] [2022-02-23 20:32:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-23 20:32:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2022-02-23 20:32:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 86 states have (on average 1.186046511627907) internal successors, (102), 87 states have internal predecessors, (102), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 20:32:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2022-02-23 20:32:16,117 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 41 [2022-02-23 20:32:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:32:16,117 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2022-02-23 20:32:16,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 28 states have internal predecessors, (66), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 20:32:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2022-02-23 20:32:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 20:32:16,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:32:16,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:32:16,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-02-23 20:32:16,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 20:32:16,319 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:32:16,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:32:16,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1915025960, now seen corresponding path program 1 times [2022-02-23 20:32:16,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:32:16,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273277749] [2022-02-23 20:32:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:32:16,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:32:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:32:16,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:32:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:32:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 20:32:16,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:32:16,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273277749] [2022-02-23 20:32:16,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273277749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:32:16,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579253601] [2022-02-23 20:32:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:32:16,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:32:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:32:16,514 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:32:16,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 20:32:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:32:16,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 20:32:16,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:32:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 20:32:16,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:32:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 20:32:17,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579253601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:32:17,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:32:17,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2022-02-23 20:32:17,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133268908] [2022-02-23 20:32:17,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:32:17,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 20:32:17,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:32:17,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 20:32:17,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-23 20:32:17,067 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:32:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:32:17,621 INFO L93 Difference]: Finished difference Result 231 states and 276 transitions. [2022-02-23 20:32:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 20:32:17,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-23 20:32:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:32:17,622 INFO L225 Difference]: With dead ends: 231 [2022-02-23 20:32:17,622 INFO L226 Difference]: Without dead ends: 183 [2022-02-23 20:32:17,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-02-23 20:32:17,623 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 260 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 20:32:17,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 93 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 20:32:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-23 20:32:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2022-02-23 20:32:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 127 states have internal predecessors, (148), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 20:32:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2022-02-23 20:32:17,641 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 44 [2022-02-23 20:32:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:32:17,641 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2022-02-23 20:32:17,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:32:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2022-02-23 20:32:17,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-23 20:32:17,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:32:17,642 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:32:17,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 20:32:17,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 20:32:17,851 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:32:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:32:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1328658693, now seen corresponding path program 1 times [2022-02-23 20:32:17,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:32:17,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081249153] [2022-02-23 20:32:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:32:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:32:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:32:18,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:32:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:32:18,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-23 20:32:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:32:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:32:18,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:32:18,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081249153] [2022-02-23 20:32:18,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081249153] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:32:18,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238193765] [2022-02-23 20:32:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:32:18,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:32:18,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:32:18,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:32:18,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 20:32:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:32:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-23 20:32:18,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:32:18,470 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-02-23 20:32:18,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-02-23 20:32:18,721 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-02-23 20:32:18,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-02-23 20:32:30,900 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-23 20:32:30,901 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 36 treesize of output 12 [2022-02-23 20:32:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-23 20:32:30,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:32:50,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-02-23 20:32:50,041 INFO L356 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2022-02-23 20:32:50,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1679 treesize of output 1549 [2022-02-23 20:32:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-23 20:32:50,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238193765] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:32:50,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:32:50,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 17] total 42 [2022-02-23 20:32:50,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517745558] [2022-02-23 20:32:50,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:32:50,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-23 20:32:50,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:32:50,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-23 20:32:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1507, Unknown=16, NotChecked=0, Total=1722 [2022-02-23 20:32:50,571 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 20:33:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:33:02,307 INFO L93 Difference]: Finished difference Result 221 states and 259 transitions. [2022-02-23 20:33:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-23 20:33:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-02-23 20:33:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:33:02,309 INFO L225 Difference]: With dead ends: 221 [2022-02-23 20:33:02,309 INFO L226 Difference]: Without dead ends: 219 [2022-02-23 20:33:02,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=609, Invalid=4772, Unknown=21, NotChecked=0, Total=5402 [2022-02-23 20:33:02,312 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 177 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 20:33:02,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 201 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1235 Invalid, 0 Unknown, 570 Unchecked, 0.8s Time] [2022-02-23 20:33:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-23 20:33:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 146. [2022-02-23 20:33:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 137 states have internal predecessors, (161), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 20:33:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 170 transitions. [2022-02-23 20:33:02,328 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 170 transitions. Word has length 46 [2022-02-23 20:33:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:33:02,328 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 170 transitions. [2022-02-23 20:33:02,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 20:33:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 170 transitions. [2022-02-23 20:33:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-23 20:33:02,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:33:02,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:33:02,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 20:33:02,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 20:33:02,531 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:33:02,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:33:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1678714754, now seen corresponding path program 1 times [2022-02-23 20:33:02,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:33:02,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172279749] [2022-02-23 20:33:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:33:02,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:33:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:33:02,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:33:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:33:02,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-23 20:33:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:33:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 20:33:02,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:33:02,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172279749] [2022-02-23 20:33:02,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172279749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:33:02,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839489125] [2022-02-23 20:33:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:33:02,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:33:02,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:33:02,785 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:33:02,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 20:33:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:33:02,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 20:33:02,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:33:02,989 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-02-23 20:33:02,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-02-23 20:33:05,020 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_5| Int) (|v_main_~#v~0.offset_BEFORE_CALL_5| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_5|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_5| 4)) (select .cse0 (+ 8 |v_main_~#v~0.offset_BEFORE_CALL_5|))))) is different from true [2022-02-23 20:33:05,080 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-23 20:33:05,081 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 34 treesize of output 10 [2022-02-23 20:33:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 2 not checked. [2022-02-23 20:33:05,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:33:05,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-23 20:33:05,859 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-02-23 20:33:05,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 98 [2022-02-23 20:33:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-23 20:33:05,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839489125] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:33:05,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:33:05,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 27 [2022-02-23 20:33:05,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710029904] [2022-02-23 20:33:05,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:33:05,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-23 20:33:05,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:33:05,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-23 20:33:05,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=578, Unknown=1, NotChecked=48, Total=702 [2022-02-23 20:33:05,997 INFO L87 Difference]: Start difference. First operand 146 states and 170 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 20:33:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:33:32,947 INFO L93 Difference]: Finished difference Result 223 states and 258 transitions. [2022-02-23 20:33:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 20:33:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-02-23 20:33:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:33:32,949 INFO L225 Difference]: With dead ends: 223 [2022-02-23 20:33:32,949 INFO L226 Difference]: Without dead ends: 221 [2022-02-23 20:33:32,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=249, Invalid=1904, Unknown=13, NotChecked=90, Total=2256 [2022-02-23 20:33:32,951 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 20:33:32,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 116 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 754 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2022-02-23 20:33:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-23 20:33:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 140. [2022-02-23 20:33:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 130 states have (on average 1.1846153846153846) internal successors, (154), 131 states have internal predecessors, (154), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 20:33:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 163 transitions. [2022-02-23 20:33:32,981 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 163 transitions. Word has length 46 [2022-02-23 20:33:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:33:32,982 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 163 transitions. [2022-02-23 20:33:32,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 20:33:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 163 transitions. [2022-02-23 20:33:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-23 20:33:32,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:33:32,982 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:33:33,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 20:33:33,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 20:33:33,195 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:33:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:33:33,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2059580614, now seen corresponding path program 2 times [2022-02-23 20:33:33,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:33:33,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513669648] [2022-02-23 20:33:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:33:33,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:33:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:33:33,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:33:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:33:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 20:33:33,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:33:33,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513669648] [2022-02-23 20:33:33,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513669648] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:33:33,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417698318] [2022-02-23 20:33:33,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 20:33:33,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:33:33,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:33:33,932 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:33:33,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 20:33:34,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 20:33:34,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:33:34,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 20:33:34,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:33:34,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:33:34,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-02-23 20:33:34,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:33:34,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:33:34,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:33:34,265 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 20:33:34,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-02-23 20:33:34,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:33:34,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:33:34,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:33:34,422 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 20:33:34,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-23 20:33:34,456 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 20:33:34,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-02-23 20:33:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 20:33:34,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:33:47,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2022-02-23 20:33:47,098 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-02-23 20:33:47,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 353 treesize of output 338 [2022-02-23 20:33:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 20:33:47,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417698318] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:33:47,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:33:47,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 44 [2022-02-23 20:33:47,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634934882] [2022-02-23 20:33:47,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:33:47,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-23 20:33:47,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:33:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-23 20:33:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1555, Unknown=9, NotChecked=0, Total=1892 [2022-02-23 20:33:47,342 INFO L87 Difference]: Start difference. First operand 140 states and 163 transitions. Second operand has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:33:49,335 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_main_~#v~0.base|))) (let ((.cse2 (* c_main_~j~0 4)) (.cse0 (select .cse1 0)) (.cse4 (< c_main_~j~0 1)) (.cse5 (= (* c_main_~i~0 4) 0))) (and (<= .cse0 (select .cse1 (+ |c_main_~#v~0.offset| (- 4) .cse2))) (= |c_#NULL.base| |c_old(#NULL.base)|) (= 8 .cse2) (or |c_main_#t~short10| (forall ((v_ArrVal_354 Int) (v_main_~i~0_47 Int) (v_ArrVal_349 Int)) (or (< (+ c_main_~j~0 1) v_main_~i~0_47) (not (<= c_main_~key~0 v_ArrVal_349)) (< v_main_~i~0_47 2) (let ((.cse3 (store (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ (* c_main_~i~0 4) |c_main_~#v~0.offset| 4) v_ArrVal_349) (+ (* v_main_~i~0_47 4) |c_main_~#v~0.offset|) v_ArrVal_354))) (<= (select .cse3 |c_main_~#v~0.offset|) (select .cse3 (+ |c_main_~#v~0.offset| 4))))))) (or (not (<= 0 c_main_~i~0)) .cse4 .cse5) (<= .cse0 (select .cse1 (+ |c_main_~#v~0.offset| 4))) (<= c_main_~i~0 2) (or .cse4 (not |c_main_#t~short10|) .cse5) (= |c_main_~#v~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)))) is different from false [2022-02-23 20:34:12,264 WARN L232 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 20:35:03,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:35:03,218 INFO L93 Difference]: Finished difference Result 429 states and 527 transitions. [2022-02-23 20:35:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-23 20:35:03,219 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-23 20:35:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:35:03,221 INFO L225 Difference]: With dead ends: 429 [2022-02-23 20:35:03,221 INFO L226 Difference]: Without dead ends: 371 [2022-02-23 20:35:03,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 12 SemanticMatches, 110 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4468 ImplicationChecksByTransitivity, 87.8s TimeCoverageRelationStatistics Valid=1938, Invalid=10228, Unknown=48, NotChecked=218, Total=12432 [2022-02-23 20:35:03,225 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 308 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 996 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 20:35:03,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 131 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1036 Invalid, 0 Unknown, 996 Unchecked, 0.8s Time] [2022-02-23 20:35:03,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-23 20:35:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 185. [2022-02-23 20:35:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 175 states have (on average 1.2285714285714286) internal successors, (215), 176 states have internal predecessors, (215), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 20:35:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2022-02-23 20:35:03,254 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 46 [2022-02-23 20:35:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:35:03,254 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2022-02-23 20:35:03,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:35:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2022-02-23 20:35:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-23 20:35:03,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:35:03,255 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:35:03,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 20:35:03,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:35:03,455 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:35:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:35:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1792607455, now seen corresponding path program 3 times [2022-02-23 20:35:03,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:35:03,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249672425] [2022-02-23 20:35:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:35:03,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:35:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:35:03,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:35:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:35:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:35:03,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:35:03,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249672425] [2022-02-23 20:35:03,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249672425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:35:03,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112746] [2022-02-23 20:35:03,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 20:35:03,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:35:03,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:35:03,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:35:03,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 20:35:03,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 20:35:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:35:03,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-23 20:35:03,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:35:04,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:35:04,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-02-23 20:35:04,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:35:04,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:35:04,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 20:35:04,394 INFO L356 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2022-02-23 20:35:04,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 52 [2022-02-23 20:35:04,458 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 20:35:04,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-02-23 20:35:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-02-23 20:35:04,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:35:33,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 68 [2022-02-23 20:35:33,522 INFO L356 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2022-02-23 20:35:33,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 412 treesize of output 418 [2022-02-23 20:35:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-02-23 20:35:34,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:35:34,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:35:34,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 42 [2022-02-23 20:35:34,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931523926] [2022-02-23 20:35:34,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:35:34,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-23 20:35:34,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:35:34,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-23 20:35:34,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1485, Unknown=14, NotChecked=0, Total=1722 [2022-02-23 20:35:34,043 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 42 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 20:35:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:35:42,039 INFO L93 Difference]: Finished difference Result 303 states and 365 transitions. [2022-02-23 20:35:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-23 20:35:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-02-23 20:35:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:35:42,041 INFO L225 Difference]: With dead ends: 303 [2022-02-23 20:35:42,041 INFO L226 Difference]: Without dead ends: 301 [2022-02-23 20:35:42,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=1363, Invalid=6995, Unknown=14, NotChecked=0, Total=8372 [2022-02-23 20:35:42,044 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 289 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-23 20:35:42,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 82 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1342 Invalid, 0 Unknown, 295 Unchecked, 2.7s Time] [2022-02-23 20:35:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-23 20:35:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 158. [2022-02-23 20:35:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 148 states have (on average 1.2094594594594594) internal successors, (179), 149 states have internal predecessors, (179), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 20:35:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2022-02-23 20:35:42,069 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 46 [2022-02-23 20:35:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:35:42,069 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2022-02-23 20:35:42,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 20:35:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2022-02-23 20:35:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-23 20:35:42,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:35:42,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:35:42,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 20:35:42,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 20:35:42,270 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:35:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:35:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1570483864, now seen corresponding path program 3 times [2022-02-23 20:35:42,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:35:42,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839978685] [2022-02-23 20:35:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:35:42,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:35:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:35:43,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:35:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:35:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:35:43,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:35:43,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839978685] [2022-02-23 20:35:43,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839978685] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:35:43,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015543489] [2022-02-23 20:35:43,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 20:35:43,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:35:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:35:43,799 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:35:43,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 20:35:43,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-23 20:35:43,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:35:43,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-23 20:35:43,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:35:44,288 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-02-23 20:35:44,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-02-23 20:35:44,830 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-02-23 20:35:44,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2022-02-23 20:35:45,293 INFO L356 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2022-02-23 20:35:45,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-23 20:35:45,700 INFO L356 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2022-02-23 20:35:45,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-02-23 20:35:45,997 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-02-23 20:35:45,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-02-23 20:35:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 20:35:46,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:35:50,681 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_57 Int)) (or (not (<= c_main_~j~0 (+ v_main_~i~0_57 1))) (forall ((v_ArrVal_437 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ (* v_main_~i~0_57 4) |c_main_~#v~0.offset| 4) v_ArrVal_437))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4))))))) is different from false [2022-02-23 20:38:08,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2022-02-23 20:38:08,211 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-02-23 20:38:08,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 169635 treesize of output 166561 [2022-02-23 20:38:14,640 WARN L232 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 654 DAG size of output: 648 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)