/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 10:56:00,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 10:56:00,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 10:56:00,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 10:56:00,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 10:56:00,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 10:56:00,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 10:56:00,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 10:56:00,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 10:56:00,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 10:56:00,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 10:56:00,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 10:56:00,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 10:56:00,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 10:56:00,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 10:56:00,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 10:56:00,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 10:56:00,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 10:56:00,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 10:56:00,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 10:56:00,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 10:56:00,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 10:56:00,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 10:56:00,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 10:56:00,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 10:56:00,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 10:56:00,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 10:56:00,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 10:56:00,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 10:56:00,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-23 10:56:00,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 10:56:00,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 10:56:00,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 10:56:00,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 10:56:00,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 10:56:00,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 10:56:00,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 10:56:00,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 10:56:00,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 10:56:00,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 10:56:00,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 10:56:00,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-23 10:56:00,727 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 10:56:00,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 10:56:00,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-23 10:56:00,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-23 10:56:00,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 10:56:00,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 10:56:00,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 10:56:00,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 10:56:00,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 10:56:00,729 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 10:56:00,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 10:56:00,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-23 10:56:00,730 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-23 10:56:00,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 10:56:00,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 10:56:00,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 10:56:00,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 10:56:00,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 10:56:00,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 10:56:00,953 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 10:56:00,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-02-23 10:56:01,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8033ea82/5516b7ffa56f4caf92f2faaf0746d185/FLAG46ff662b6 [2022-02-23 10:56:01,368 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 10:56:01,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-02-23 10:56:01,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8033ea82/5516b7ffa56f4caf92f2faaf0746d185/FLAG46ff662b6 [2022-02-23 10:56:01,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8033ea82/5516b7ffa56f4caf92f2faaf0746d185 [2022-02-23 10:56:01,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 10:56:01,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-23 10:56:01,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 10:56:01,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 10:56:01,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 10:56:01,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@511fa4b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01, skipping insertion in model container [2022-02-23 10:56:01,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 10:56:01,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 10:56:01,543 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-02-23 10:56:01,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 10:56:01,561 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 10:56:01,571 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-02-23 10:56:01,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 10:56:01,596 INFO L208 MainTranslator]: Completed translation [2022-02-23 10:56:01,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01 WrapperNode [2022-02-23 10:56:01,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 10:56:01,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 10:56:01,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 10:56:01,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 10:56:01,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 10:56:01,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 10:56:01,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 10:56:01,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 10:56:01,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01" (1/1) ... [2022-02-23 10:56:01,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 10:56:01,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:56:01,652 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 10:56:01,675 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 10:56:01,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 10:56:01,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 10:56:01,683 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 10:56:01,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 10:56:01,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 10:56:01,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 10:56:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-23 10:56:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 10:56:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 10:56:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 10:56:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 10:56:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 10:56:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 10:56:01,750 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 10:56:01,751 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 10:56:01,863 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 10:56:01,870 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 10:56:01,870 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 10:56:01,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:56:01 BoogieIcfgContainer [2022-02-23 10:56:01,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 10:56:01,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 10:56:01,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 10:56:01,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 10:56:01,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:56:01" (1/3) ... [2022-02-23 10:56:01,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623181f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:56:01, skipping insertion in model container [2022-02-23 10:56:01,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:01" (2/3) ... [2022-02-23 10:56:01,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623181f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:56:01, skipping insertion in model container [2022-02-23 10:56:01,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:56:01" (3/3) ... [2022-02-23 10:56:01,880 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2022-02-23 10:56:01,883 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 10:56:01,884 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 10:56:01,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 10:56:01,933 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=PETRI_NET, 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 10:56:01,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 10:56:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 10:56:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-23 10:56:01,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:56:01,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:56:01,950 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:56:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:56:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 1 times [2022-02-23 10:56:01,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:56:01,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566366720] [2022-02-23 10:56:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:01,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:56:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:02,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:56:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:02,126 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 10:56:02,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:56:02,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566366720] [2022-02-23 10:56:02,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566366720] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 10:56:02,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 10:56:02,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 10:56:02,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874706930] [2022-02-23 10:56:02,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 10:56:02,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 10:56:02,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:56:02,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 10:56:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 10:56:02,151 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10:56:02,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:56:02,248 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-02-23 10:56:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 10:56:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-02-23 10:56:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:56:02,256 INFO L225 Difference]: With dead ends: 62 [2022-02-23 10:56:02,257 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 10:56:02,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 10:56:02,261 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 10:56:02,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 10:56:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 10:56:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-02-23 10:56:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 10:56:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-02-23 10:56:02,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-02-23 10:56:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:56:02,287 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-02-23 10:56:02,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10:56:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-02-23 10:56:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 10:56:02,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:56:02,288 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] [2022-02-23 10:56:02,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 10:56:02,288 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:56:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:56:02,289 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 1 times [2022-02-23 10:56:02,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:56:02,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382105438] [2022-02-23 10:56:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:02,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:56:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:02,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:56:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:02,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 10:56:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:02,385 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 10:56:02,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:56:02,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382105438] [2022-02-23 10:56:02,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382105438] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:02,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398532738] [2022-02-23 10:56:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:02,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:02,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:56:02,388 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 10:56:02,392 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 10:56:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:02,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 10:56:02,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:56:02,563 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 10:56:02,634 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-23 10:56:02,634 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 37 treesize of output 22 [2022-02-23 10:56:02,868 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 10:56:02,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:56:02,976 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 45 treesize of output 41 [2022-02-23 10:56:02,985 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 10:56:02,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-02-23 10:56:03,052 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-02-23 10:56:03,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 336 treesize of output 315 [2022-02-23 10:56:03,314 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 10:56:03,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398532738] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 10:56:03,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 10:56:03,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-02-23 10:56:03,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585614451] [2022-02-23 10:56:03,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 10:56:03,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 10:56:03,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:56:03,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 10:56:03,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-23 10:56:03,317 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 10:56:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:56:03,623 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-02-23 10:56:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 10:56:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-02-23 10:56:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:56:03,625 INFO L225 Difference]: With dead ends: 52 [2022-02-23 10:56:03,625 INFO L226 Difference]: Without dead ends: 41 [2022-02-23 10:56:03,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-02-23 10:56:03,627 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 10:56:03,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 69 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 264 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-02-23 10:56:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-23 10:56:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-02-23 10:56:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 10:56:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-02-23 10:56:03,632 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-02-23 10:56:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:56:03,633 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-02-23 10:56:03,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 10:56:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-02-23 10:56:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 10:56:03,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:56:03,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:56:03,654 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 10:56:03,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:03,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:56:03,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:56:03,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 2 times [2022-02-23 10:56:03,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:56:03,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149028551] [2022-02-23 10:56:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:03,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:56:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:03,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:56:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:03,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 10:56:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 10:56:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 10:56:03,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:56:03,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149028551] [2022-02-23 10:56:03,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149028551] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:03,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085314833] [2022-02-23 10:56:03,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 10:56:03,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:03,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:56:03,962 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 10:56:03,963 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 10:56:04,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 10:56:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 10:56:04,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 10:56:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:56:04,075 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 10:56:04,294 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-02-23 10:56:04,295 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 45 treesize of output 48 [2022-02-23 10:56:04,517 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-23 10:56:04,518 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 37 treesize of output 22 [2022-02-23 10:56:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 10:56:04,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:56:08,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085314833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:08,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 10:56:08,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-02-23 10:56:08,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685314427] [2022-02-23 10:56:08,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 10:56:08,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 10:56:08,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:56:08,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 10:56:08,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-02-23 10:56:08,227 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-23 10:56:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:56:08,680 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-02-23 10:56:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 10:56:08,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-02-23 10:56:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:56:08,682 INFO L225 Difference]: With dead ends: 66 [2022-02-23 10:56:08,682 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 10:56:08,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=257, Invalid=1547, Unknown=2, NotChecked=0, Total=1806 [2022-02-23 10:56:08,683 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 10:56:08,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 71 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 165 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-02-23 10:56:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 10:56:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-02-23 10:56:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 10:56:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-02-23 10:56:08,691 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-02-23 10:56:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:56:08,691 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-02-23 10:56:08,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-23 10:56:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-02-23 10:56:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 10:56:08,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:56:08,692 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:56:08,710 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 10:56:08,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 10:56:08,908 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:56:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:56:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1452373648, now seen corresponding path program 1 times [2022-02-23 10:56:08,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:56:08,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635992994] [2022-02-23 10:56:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:56:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:09,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:56:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:09,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 10:56:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:09,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 10:56:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:09,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 10:56:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:09,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-23 10:56:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-02-23 10:56:09,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:56:09,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635992994] [2022-02-23 10:56:09,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635992994] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:09,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402620229] [2022-02-23 10:56:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:09,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:09,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:56:09,037 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 10:56:09,038 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 10:56:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:09,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 10:56:09,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:56:09,165 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 0 case distinctions, treesize of input 58 treesize of output 53 [2022-02-23 10:56:09,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-02-23 10:56:09,216 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-02-23 10:56:09,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 100 treesize of output 28 [2022-02-23 10:56:09,985 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-02-23 10:56:09,986 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 56 treesize of output 57 [2022-02-23 10:56:10,782 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-02-23 10:56:10,783 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 48 treesize of output 21 [2022-02-23 10:56:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 10:56:10,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:56:15,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402620229] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:15,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 10:56:15,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18] total 21 [2022-02-23 10:56:15,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454769531] [2022-02-23 10:56:15,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 10:56:15,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 10:56:15,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:56:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 10:56:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=599, Unknown=2, NotChecked=0, Total=702 [2022-02-23 10:56:15,218 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-23 10:56:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:56:15,611 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-02-23 10:56:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 10:56:15,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-02-23 10:56:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:56:15,612 INFO L225 Difference]: With dead ends: 79 [2022-02-23 10:56:15,613 INFO L226 Difference]: Without dead ends: 62 [2022-02-23 10:56:15,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=209, Invalid=1349, Unknown=2, NotChecked=0, Total=1560 [2022-02-23 10:56:15,614 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 10:56:15,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 171 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 138 Invalid, 0 Unknown, 150 Unchecked, 0.1s Time] [2022-02-23 10:56:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-23 10:56:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-02-23 10:56:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 10:56:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-02-23 10:56:15,630 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-02-23 10:56:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:56:15,630 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-02-23 10:56:15,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-23 10:56:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-02-23 10:56:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-23 10:56:15,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:56:15,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:56:15,653 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 10:56:15,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:15,850 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:56:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:56:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 345870625, now seen corresponding path program 2 times [2022-02-23 10:56:15,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:56:15,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780007287] [2022-02-23 10:56:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:15,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:56:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:15,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:56:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:15,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 10:56:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:15,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 10:56:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:15,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 10:56:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:15,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 10:56:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:15,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-23 10:56:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:15,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-23 10:56:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 10:56:15,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:56:15,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780007287] [2022-02-23 10:56:15,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780007287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:15,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592452518] [2022-02-23 10:56:15,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 10:56:15,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:56:15,988 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 10:56:15,989 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 10:56:16,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 10:56:16,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 10:56:16,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-23 10:56:16,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:56:16,124 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 0 case distinctions, treesize of input 58 treesize of output 53 [2022-02-23 10:56:16,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-02-23 10:56:21,520 INFO L356 Elim1Store]: treesize reduction 113, result has 28.9 percent of original size [2022-02-23 10:56:21,520 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 93 treesize of output 94 [2022-02-23 10:56:33,597 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-02-23 10:56:33,598 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 48 treesize of output 21 [2022-02-23 10:56:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 10:56:33,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:56:41,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592452518] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:41,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 10:56:41,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 22] total 25 [2022-02-23 10:56:41,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949984502] [2022-02-23 10:56:41,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 10:56:41,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 10:56:41,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:56:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 10:56:41,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=844, Unknown=10, NotChecked=0, Total=992 [2022-02-23 10:56:41,162 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 25 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 10:56:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:56:44,234 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2022-02-23 10:56:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-23 10:56:44,234 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-02-23 10:56:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:56:44,235 INFO L225 Difference]: With dead ends: 111 [2022-02-23 10:56:44,236 INFO L226 Difference]: Without dead ends: 86 [2022-02-23 10:56:44,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=263, Invalid=1888, Unknown=11, NotChecked=0, Total=2162 [2022-02-23 10:56:44,237 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 10:56:44,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 203 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 263 Invalid, 0 Unknown, 295 Unchecked, 0.1s Time] [2022-02-23 10:56:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-23 10:56:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-02-23 10:56:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 10:56:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-02-23 10:56:44,247 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-02-23 10:56:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:56:44,248 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-02-23 10:56:44,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 10:56:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-02-23 10:56:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-23 10:56:44,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:56:44,249 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:56:44,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 10:56:44,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:44,468 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:56:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:56:44,468 INFO L85 PathProgramCache]: Analyzing trace with hash 648561106, now seen corresponding path program 3 times [2022-02-23 10:56:44,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:56:44,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628719529] [2022-02-23 10:56:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:44,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:56:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:56:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 10:56:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 10:56:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 10:56:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 10:56:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-23 10:56:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-23 10:56:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-23 10:56:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-23 10:56:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-02-23 10:56:44,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:56:44,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628719529] [2022-02-23 10:56:44,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628719529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:44,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790842368] [2022-02-23 10:56:44,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 10:56:44,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:44,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:56:44,587 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 10:56:44,588 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 10:56:45,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-23 10:56:45,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 10:56:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-23 10:56:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:56:45,165 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 0 case distinctions, treesize of input 58 treesize of output 53 [2022-02-23 10:56:45,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 10:56:45,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-02-23 10:56:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 10:56:45,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 102 treesize of output 30 [2022-02-23 10:56:45,438 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 0 case distinctions, treesize of input 104 treesize of output 95 [2022-02-23 10:56:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 10:56:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 10:56:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 10:56:45,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 143 [2022-02-23 10:56:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-02-23 10:56:45,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:56:48,301 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 45 treesize of output 41 [2022-02-23 10:56:48,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-23 10:56:48,318 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 10:56:48,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-02-23 10:56:48,342 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-02-23 10:56:48,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 10 [2022-02-23 10:56:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 10:56:48,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790842368] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 10:56:48,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 10:56:48,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-02-23 10:56:48,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999558959] [2022-02-23 10:56:48,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 10:56:48,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-23 10:56:48,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:56:48,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-23 10:56:48,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-02-23 10:56:48,675 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-23 10:56:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:56:54,627 INFO L93 Difference]: Finished difference Result 194 states and 219 transitions. [2022-02-23 10:56:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-23 10:56:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-02-23 10:56:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:56:54,630 INFO L225 Difference]: With dead ends: 194 [2022-02-23 10:56:54,630 INFO L226 Difference]: Without dead ends: 161 [2022-02-23 10:56:54,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1101, Invalid=6039, Unknown=0, NotChecked=0, Total=7140 [2022-02-23 10:56:54,632 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 213 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-23 10:56:54,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 139 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1564 Invalid, 0 Unknown, 335 Unchecked, 1.8s Time] [2022-02-23 10:56:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-23 10:56:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2022-02-23 10:56:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 92 states have internal predecessors, (97), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-23 10:56:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2022-02-23 10:56:54,654 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 77 [2022-02-23 10:56:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:56:54,654 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2022-02-23 10:56:54,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-23 10:56:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2022-02-23 10:56:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-23 10:56:54,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:56:54,656 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:56:54,663 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 10:56:54,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:54,864 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:56:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:56:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash 616668035, now seen corresponding path program 4 times [2022-02-23 10:56:54,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:56:54,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407754029] [2022-02-23 10:56:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:54,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:56:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:54,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:56:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:54,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 10:56:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:54,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 10:56:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:54,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 10:56:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:54,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 10:56:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:54,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-23 10:56:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-23 10:56:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:55,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-23 10:56:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:55,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-23 10:56:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:55,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-23 10:56:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:55,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-23 10:56:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-23 10:56:55,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:56:55,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407754029] [2022-02-23 10:56:55,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407754029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:55,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907032146] [2022-02-23 10:56:55,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 10:56:55,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:56:55,018 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 10:56:55,043 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 10:56:55,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 10:56:55,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 10:56:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 10:56:55,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:56:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-23 10:56:55,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:56:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-23 10:56:55,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907032146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 10:56:55,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 10:56:55,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 10:56:55,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699123634] [2022-02-23 10:56:55,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 10:56:55,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 10:56:55,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:56:55,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 10:56:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-23 10:56:55,998 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-23 10:56:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:56:57,202 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2022-02-23 10:56:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 10:56:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-02-23 10:56:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:56:57,204 INFO L225 Difference]: With dead ends: 211 [2022-02-23 10:56:57,204 INFO L226 Difference]: Without dead ends: 159 [2022-02-23 10:56:57,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-02-23 10:56:57,205 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 213 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 10:56:57,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 84 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 10:56:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-23 10:56:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-02-23 10:56:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 10:56:57,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-02-23 10:56:57,228 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-02-23 10:56:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:56:57,228 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-02-23 10:56:57,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-23 10:56:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-02-23 10:56:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-23 10:56:57,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:56:57,238 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:56:57,257 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 10:56:57,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:57,451 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:56:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:56:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1102839803, now seen corresponding path program 5 times [2022-02-23 10:56:57,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:56:57,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599077945] [2022-02-23 10:56:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:56:57,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:56:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:56:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 10:56:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 10:56:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 10:56:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 10:56:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-23 10:56:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-23 10:56:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-23 10:56:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-23 10:56:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-23 10:56:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-23 10:56:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-23 10:56:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-23 10:56:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-23 10:56:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-23 10:56:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-02-23 10:56:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-02-23 10:56:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-02-23 10:56:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:56:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-02-23 10:56:57,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:56:57,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599077945] [2022-02-23 10:56:57,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599077945] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:56:57,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590293003] [2022-02-23 10:56:57,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 10:56:57,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:56:57,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:56:57,772 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 10:56:57,773 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 10:57:36,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-02-23 10:57:36,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 10:57:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-23 10:57:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:57:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-02-23 10:57:36,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:57:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-02-23 10:57:36,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590293003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 10:57:36,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 10:57:36,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-02-23 10:57:36,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965507366] [2022-02-23 10:57:36,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 10:57:36,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-23 10:57:36,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:57:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-23 10:57:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-02-23 10:57:36,864 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-23 10:57:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:57:56,576 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2022-02-23 10:57:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-23 10:57:56,576 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-02-23 10:57:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:57:56,579 INFO L225 Difference]: With dead ends: 320 [2022-02-23 10:57:56,579 INFO L226 Difference]: Without dead ends: 287 [2022-02-23 10:57:56,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1114, Invalid=2917, Unknown=1, NotChecked=0, Total=4032 [2022-02-23 10:57:56,581 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 609 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-23 10:57:56,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 163 Invalid, 3797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 3142 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-23 10:57:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-23 10:57:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-02-23 10:57:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-02-23 10:57:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-02-23 10:57:56,640 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-02-23 10:57:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:57:56,640 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-02-23 10:57:56,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-23 10:57:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-02-23 10:57:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-02-23 10:57:56,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:57:56,643 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:57:56,654 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 10:57:56,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:57:56,854 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:57:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:57:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1415471691, now seen corresponding path program 6 times [2022-02-23 10:57:56,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:57:56,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191110259] [2022-02-23 10:57:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:57:56,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:57:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:57:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 10:57:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 10:57:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 10:57:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 10:57:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-23 10:57:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-23 10:57:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-23 10:57:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-23 10:57:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-23 10:57:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-23 10:57:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-23 10:57:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-23 10:57:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-23 10:57:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-23 10:57:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-23 10:57:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-23 10:57:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-02-23 10:57:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-02-23 10:57:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-02-23 10:57:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-02-23 10:57:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-02-23 10:57:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-02-23 10:57:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-02-23 10:57:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-02-23 10:57:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-02-23 10:57:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-02-23 10:57:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-02-23 10:57:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-02-23 10:57:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-02-23 10:57:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-02-23 10:57:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-02-23 10:57:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-02-23 10:57:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-02-23 10:57:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:57:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-02-23 10:57:57,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:57:57,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191110259] [2022-02-23 10:57:57,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191110259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:57:57,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587682984] [2022-02-23 10:57:57,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 10:57:57,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:57:57,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:57:57,591 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 10:57:57,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process