/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:03:47,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:03:47,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:03:47,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:03:47,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:03:47,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:03:47,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:03:47,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:03:47,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:03:47,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:03:47,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:03:47,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:03:47,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:03:47,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:03:47,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:03:47,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:03:47,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:03:47,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:03:47,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:03:47,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:03:47,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:03:47,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:03:47,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:03:47,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:03:47,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:03:47,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:03:47,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:03:47,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:03:47,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:03:47,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:03:47,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:03:47,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:03:47,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:03:47,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:03:47,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:03:47,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:03:47,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:03:47,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:03:47,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:03:47,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:03:47,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:03:47,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:03:47,862 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:03:47,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:03:47,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:03:47,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:03:47,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:03:47,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:03:47,864 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:03:47,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:03:47,865 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:03:47,865 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:03:47,865 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:03:47,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:03:47,866 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:03:47,866 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:03:47,866 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:03:47,866 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:03:47,866 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:03:47,866 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:03:47,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:03:47,867 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:03:47,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:03:47,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:03:47,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:03:47,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:03:47,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:03:47,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:03:47,868 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:03:47,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:03:47,868 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:03:47,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:03:47,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:03:47,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:03:47,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:03:47,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:03:47,869 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:03:47,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:03:47,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:03:47,870 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:03:47,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:03:47,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:03:47,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:03:47,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:03:48,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:03:48,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:03:48,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:03:48,134 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:03:48,135 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:03:48,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label22.c [2023-04-01 10:03:49,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:03:49,721 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:03:49,722 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label22.c [2023-04-01 10:03:49,750 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/330872e82/64109b4e0ab44f5a91a80afb13263e18/FLAG71a015929 [2023-04-01 10:03:49,767 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/330872e82/64109b4e0ab44f5a91a80afb13263e18 [2023-04-01 10:03:49,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:03:49,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:03:49,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:03:49,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:03:49,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:03:49,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:03:49" (1/1) ... [2023-04-01 10:03:49,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ef9444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:49, skipping insertion in model container [2023-04-01 10:03:49,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:03:49" (1/1) ... [2023-04-01 10:03:49,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:03:49,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:03:50,187 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label22.c[7880,7893] [2023-04-01 10:03:50,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:03:50,893 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:03:50,925 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label22.c[7880,7893] [2023-04-01 10:03:51,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:03:51,328 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:03:51,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51 WrapperNode [2023-04-01 10:03:51,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:03:51,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:03:51,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:03:51,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:03:51,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (1/1) ... [2023-04-01 10:03:51,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (1/1) ... [2023-04-01 10:03:51,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (1/1) ... [2023-04-01 10:03:51,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (1/1) ... [2023-04-01 10:03:51,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (1/1) ... [2023-04-01 10:03:51,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (1/1) ... [2023-04-01 10:03:51,556 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (1/1) ... [2023-04-01 10:03:51,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (1/1) ... [2023-04-01 10:03:51,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:03:51,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:03:51,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:03:51,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:03:51,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (1/1) ... [2023-04-01 10:03:51,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:03:51,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:03:51,635 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) [2023-04-01 10:03:51,646 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 [2023-04-01 10:03:51,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:03:51,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:03:51,683 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:03:51,687 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:03:51,687 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:03:51,687 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:03:51,688 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:03:51,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:03:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:03:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:03:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:03:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:03:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:03:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:03:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:03:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:03:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:03:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:03:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:03:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:03:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:03:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:03:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:03:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:03:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:03:51,752 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:03:51,754 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:03:55,545 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:03:56,153 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:03:56,154 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:03:56,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:56 BoogieIcfgContainer [2023-04-01 10:03:56,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:03:56,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:03:56,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:03:56,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:03:56,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:03:49" (1/3) ... [2023-04-01 10:03:56,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f30d3c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:56, skipping insertion in model container [2023-04-01 10:03:56,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:51" (2/3) ... [2023-04-01 10:03:56,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f30d3c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:56, skipping insertion in model container [2023-04-01 10:03:56,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:56" (3/3) ... [2023-04-01 10:03:56,173 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label22.c [2023-04-01 10:03:56,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:03:56,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:03:56,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:03:56,269 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66efa461, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:03:56,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:03:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:03:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:03:56,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:56,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:03:56,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:56,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:56,292 INFO L85 PathProgramCache]: Analyzing trace with hash 636351300, now seen corresponding path program 1 times [2023-04-01 10:03:56,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:56,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78375795] [2023-04-01 10:03:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:03:56,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:56,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78375795] [2023-04-01 10:03:56,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78375795] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:56,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:03:56,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:03:56,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319156957] [2023-04-01 10:03:56,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:56,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:03:56,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:03:56,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:03:56,725 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:03:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:59,959 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:03:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:03:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:03:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:59,981 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:03:59,982 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:03:59,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:03:59,992 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 738 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:59,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 112 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 10:04:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:04:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 10:04:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.9348148148148148) internal successors, (2612), 1350 states have internal predecessors, (2612), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:04:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2635 transitions. [2023-04-01 10:04:00,102 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2635 transitions. Word has length 11 [2023-04-01 10:04:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:00,103 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2635 transitions. [2023-04-01 10:04:00,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:04:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2635 transitions. [2023-04-01 10:04:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:04:00,104 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:00,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:04:00,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:04:00,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:00,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:00,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1446385695, now seen corresponding path program 1 times [2023-04-01 10:04:00,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:00,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099256952] [2023-04-01 10:04:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:00,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:04:00,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:00,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099256952] [2023-04-01 10:04:00,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099256952] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:00,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:04:00,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:04:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964759382] [2023-04-01 10:04:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:00,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:04:00,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:04:00,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:04:00,337 INFO L87 Difference]: Start difference. First operand 1368 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:04:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:04,637 INFO L93 Difference]: Finished difference Result 4148 states and 8004 transitions. [2023-04-01 10:04:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:04:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-04-01 10:04:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:04,656 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 10:04:04,657 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 10:04:04,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:04:04,670 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2807 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2807 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:04,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2807 Valid, 101 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 10:04:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 10:04:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-04-01 10:04:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2713 states have (on average 1.6973829708809436) internal successors, (4605), 2717 states have internal predecessors, (4605), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 10:04:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4682 transitions. [2023-04-01 10:04:04,782 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4682 transitions. Word has length 29 [2023-04-01 10:04:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:04,783 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4682 transitions. [2023-04-01 10:04:04,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:04:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4682 transitions. [2023-04-01 10:04:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 10:04:04,785 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:04,786 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:04:04,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:04:04,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:04,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:04,786 INFO L85 PathProgramCache]: Analyzing trace with hash 728764166, now seen corresponding path program 1 times [2023-04-01 10:04:04,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:04,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280600310] [2023-04-01 10:04:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:04:05,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:05,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280600310] [2023-04-01 10:04:05,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280600310] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:04:05,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984539255] [2023-04-01 10:04:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:05,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:04:05,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:04:05,087 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) [2023-04-01 10:04:05,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:04:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:05,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:04:05,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:04:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:04:05,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:04:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984539255] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:05,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:04:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:04:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409905275] [2023-04-01 10:04:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:04:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:04:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:04:05,287 INFO L87 Difference]: Start difference. First operand 2755 states and 4682 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:04:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:09,513 INFO L93 Difference]: Finished difference Result 8445 states and 14563 transitions. [2023-04-01 10:04:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:04:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-04-01 10:04:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:09,543 INFO L225 Difference]: With dead ends: 8445 [2023-04-01 10:04:09,543 INFO L226 Difference]: Without dead ends: 5695 [2023-04-01 10:04:09,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:04:09,553 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2314 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:09,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2314 Valid, 95 Invalid, 5310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 10:04:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2023-04-01 10:04:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5583. [2023-04-01 10:04:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5460 states have (on average 1.491941391941392) internal successors, (8146), 5483 states have internal predecessors, (8146), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (350), 72 states have call predecessors, (350), 26 states have call successors, (350) [2023-04-01 10:04:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8523 transitions. [2023-04-01 10:04:09,808 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8523 transitions. Word has length 43 [2023-04-01 10:04:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:09,808 INFO L495 AbstractCegarLoop]: Abstraction has 5583 states and 8523 transitions. [2023-04-01 10:04:09,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:04:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8523 transitions. [2023-04-01 10:04:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:04:09,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:09,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:04:09,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:04:10,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:04:10,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:10,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:10,012 INFO L85 PathProgramCache]: Analyzing trace with hash -538186050, now seen corresponding path program 1 times [2023-04-01 10:04:10,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:10,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115871750] [2023-04-01 10:04:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:10,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:04:10,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:10,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115871750] [2023-04-01 10:04:10,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115871750] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:10,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:04:10,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:04:10,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277494184] [2023-04-01 10:04:10,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:04:10,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:04:10,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:04:10,210 INFO L87 Difference]: Start difference. First operand 5583 states and 8523 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:04:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:14,434 INFO L93 Difference]: Finished difference Result 17084 states and 27298 transitions. [2023-04-01 10:04:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:04:14,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2023-04-01 10:04:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:14,492 INFO L225 Difference]: With dead ends: 17084 [2023-04-01 10:04:14,493 INFO L226 Difference]: Without dead ends: 11506 [2023-04-01 10:04:14,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:04:14,510 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2079 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 4739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:14,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 102 Invalid, 5448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 10:04:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11506 states. [2023-04-01 10:04:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 11063. [2023-04-01 10:04:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 10731 states have (on average 1.3301649426894044) internal successors, (14274), 10821 states have internal predecessors, (14274), 51 states have call successors, (51), 51 states have call predecessors, (51), 280 states have return successors, (1406), 190 states have call predecessors, (1406), 50 states have call successors, (1406) [2023-04-01 10:04:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 15731 transitions. [2023-04-01 10:04:14,840 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 15731 transitions. Word has length 42 [2023-04-01 10:04:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:14,840 INFO L495 AbstractCegarLoop]: Abstraction has 11063 states and 15731 transitions. [2023-04-01 10:04:14,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:04:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 15731 transitions. [2023-04-01 10:04:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 10:04:14,849 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:14,849 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:04:14,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:04:14,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:14,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:14,850 INFO L85 PathProgramCache]: Analyzing trace with hash -139717709, now seen corresponding path program 1 times [2023-04-01 10:04:14,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:14,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030318652] [2023-04-01 10:04:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:14,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:04:15,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:15,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030318652] [2023-04-01 10:04:15,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030318652] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:04:15,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598194515] [2023-04-01 10:04:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:15,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:04:15,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:04:15,134 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) [2023-04-01 10:04:15,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:04:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:15,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:04:15,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:04:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:04:15,377 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:04:15,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598194515] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:15,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:04:15,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:04:15,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454741258] [2023-04-01 10:04:15,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:15,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:04:15,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:15,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:04:15,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:04:15,379 INFO L87 Difference]: Start difference. First operand 11063 states and 15731 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:04:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:19,215 INFO L93 Difference]: Finished difference Result 28698 states and 43618 transitions. [2023-04-01 10:04:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:04:19,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 80 [2023-04-01 10:04:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:19,300 INFO L225 Difference]: With dead ends: 28698 [2023-04-01 10:04:19,301 INFO L226 Difference]: Without dead ends: 17640 [2023-04-01 10:04:19,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:04:19,333 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2068 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:19,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 86 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 10:04:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2023-04-01 10:04:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 16650. [2023-04-01 10:04:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16650 states, 16138 states have (on average 1.3326930226793903) internal successors, (21507), 16283 states have internal predecessors, (21507), 76 states have call successors, (76), 76 states have call predecessors, (76), 435 states have return successors, (3154), 290 states have call predecessors, (3154), 75 states have call successors, (3154) [2023-04-01 10:04:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 24737 transitions. [2023-04-01 10:04:19,806 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 24737 transitions. Word has length 80 [2023-04-01 10:04:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:19,807 INFO L495 AbstractCegarLoop]: Abstraction has 16650 states and 24737 transitions. [2023-04-01 10:04:19,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:04:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 24737 transitions. [2023-04-01 10:04:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 10:04:19,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:19,809 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:04:19,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:04:20,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:04:20,011 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:20,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:20,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1611260930, now seen corresponding path program 1 times [2023-04-01 10:04:20,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:20,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355152012] [2023-04-01 10:04:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:20,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:04:20,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:20,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355152012] [2023-04-01 10:04:20,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355152012] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:04:20,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495131078] [2023-04-01 10:04:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:20,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:04:20,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:04:20,213 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) [2023-04-01 10:04:20,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:04:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:20,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:04:20,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:04:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:04:20,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:04:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:04:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495131078] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:04:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [90890126] [2023-04-01 10:04:20,674 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 10:04:20,675 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:04:20,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:04:20,682 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:04:20,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:04:21,034 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:04:21,393 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58