/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 OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:35:39,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:35:39,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:35:39,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:35:39,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:35:39,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:35:39,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:35:39,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:35:39,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:35:39,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:35:39,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:35:39,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:35:39,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:35:39,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:35:39,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:35:39,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:35:39,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:35:39,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:35:39,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:35:39,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:35:39,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:35:39,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:35:39,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:35:39,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:35:39,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-03 02:35:39,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:35:39,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:35:39,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:35:39,166 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 [2023-04-03 02:35:39,179 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:35:39,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:35:39,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:35:39,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:35:39,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:35:39,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:35:39,181 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:35:39,181 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:35:39,181 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:35:39,181 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:35:39,181 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:35:39,181 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:35:39,181 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:35:39,181 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:35:39,182 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:35:39,182 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:35:39,182 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:35:39,182 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:35:39,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:35:39,182 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:35:39,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:35:39,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:35:39,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:35:39,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:35:39,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:35:39,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:35:39,183 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:35:39,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:35:39,183 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:35:39,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:35:39,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:35:39,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:35:39,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:35:39,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:35:39,184 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:35:39,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:35:39,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:35:39,184 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:35:39,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:35:39,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:35:39,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:35:39,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:35:39,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:35:39,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:35:39,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:35:39,367 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:35:39,367 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:35:39,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:35:40,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:35:40,596 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:35:40,596 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:35:40,601 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0040dce2/1091b98c608e4929bea72ce02a4134ab/FLAG270ad6b16 [2023-04-03 02:35:40,610 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0040dce2/1091b98c608e4929bea72ce02a4134ab [2023-04-03 02:35:40,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:35:40,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:35:40,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:35:40,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:35:40,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:35:40,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d9b0e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40, skipping insertion in model container [2023-04-03 02:35:40,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:35:40,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:35:40,777 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4371,4384] [2023-04-03 02:35:40,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:35:40,804 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:35:40,830 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4371,4384] [2023-04-03 02:35:40,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:35:40,850 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:35:40,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40 WrapperNode [2023-04-03 02:35:40,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:35:40,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:35:40,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:35:40,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:35:40,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,884 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:35:40,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:35:40,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:35:40,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:35:40,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (1/1) ... [2023-04-03 02:35:40,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:35:40,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:35:40,933 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) [2023-04-03 02:35:40,940 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 [2023-04-03 02:35:40,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:35:40,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:35:40,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:35:40,959 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:35:40,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:35:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:35:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:35:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:35:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:35:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:35:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:35:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:35:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:35:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:35:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:35:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:35:41,034 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:35:41,035 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:35:41,364 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:35:41,460 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:35:41,460 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:35:41,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:35:41 BoogieIcfgContainer [2023-04-03 02:35:41,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:35:41,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:35:41,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:35:41,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:35:41,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:35:40" (1/3) ... [2023-04-03 02:35:41,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a05266e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:35:41, skipping insertion in model container [2023-04-03 02:35:41,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:40" (2/3) ... [2023-04-03 02:35:41,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a05266e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:35:41, skipping insertion in model container [2023-04-03 02:35:41,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:35:41" (3/3) ... [2023-04-03 02:35:41,469 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:35:41,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:35:41,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:35:41,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:35:41,526 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;@641b0546, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:35:41,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:35:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 64 states have (on average 1.65625) internal successors, (106), 65 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:35:41,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-03 02:35:41,535 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:41,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:41,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:41,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash 148092094, now seen corresponding path program 1 times [2023-04-03 02:35:41,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:41,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662154659] [2023-04-03 02:35:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:41,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:41,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:41,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662154659] [2023-04-03 02:35:41,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662154659] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:41,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:41,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:41,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155026513] [2023-04-03 02:35:41,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:41,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:41,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:41,876 INFO L87 Difference]: Start difference. First operand has 70 states, 64 states have (on average 1.65625) internal successors, (106), 65 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:41,933 INFO L93 Difference]: Finished difference Result 153 states and 231 transitions. [2023-04-03 02:35:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-03 02:35:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:41,948 INFO L225 Difference]: With dead ends: 153 [2023-04-03 02:35:41,948 INFO L226 Difference]: Without dead ends: 98 [2023-04-03 02:35:41,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:41,955 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 79 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:41,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 204 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:35:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-03 02:35:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-04-03 02:35:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.4021739130434783) internal successors, (129), 92 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2023-04-03 02:35:41,988 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 32 [2023-04-03 02:35:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:41,989 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2023-04-03 02:35:41,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2023-04-03 02:35:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 02:35:41,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:41,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:41,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:35:41,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:41,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:41,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2117687285, now seen corresponding path program 1 times [2023-04-03 02:35:41,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:41,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114597393] [2023-04-03 02:35:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:41,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:42,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:42,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114597393] [2023-04-03 02:35:42,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114597393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:42,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:42,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464590636] [2023-04-03 02:35:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:42,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:42,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:42,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:42,075 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:42,138 INFO L93 Difference]: Finished difference Result 220 states and 316 transitions. [2023-04-03 02:35:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-04-03 02:35:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:42,140 INFO L225 Difference]: With dead ends: 220 [2023-04-03 02:35:42,140 INFO L226 Difference]: Without dead ends: 147 [2023-04-03 02:35:42,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:42,144 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 58 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:42,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 155 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:35:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-03 02:35:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2023-04-03 02:35:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.425531914893617) internal successors, (201), 141 states have internal predecessors, (201), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 204 transitions. [2023-04-03 02:35:42,163 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 204 transitions. Word has length 35 [2023-04-03 02:35:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:42,163 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 204 transitions. [2023-04-03 02:35:42,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 204 transitions. [2023-04-03 02:35:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-03 02:35:42,164 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:42,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:42,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:35:42,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:42,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:42,164 INFO L85 PathProgramCache]: Analyzing trace with hash 692722299, now seen corresponding path program 1 times [2023-04-03 02:35:42,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:42,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533422830] [2023-04-03 02:35:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:42,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:42,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:42,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533422830] [2023-04-03 02:35:42,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533422830] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:42,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:42,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:42,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736496697] [2023-04-03 02:35:42,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:42,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:42,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:42,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:42,221 INFO L87 Difference]: Start difference. First operand 145 states and 204 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:42,270 INFO L93 Difference]: Finished difference Result 345 states and 498 transitions. [2023-04-03 02:35:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:42,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-04-03 02:35:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:42,272 INFO L225 Difference]: With dead ends: 345 [2023-04-03 02:35:42,272 INFO L226 Difference]: Without dead ends: 223 [2023-04-03 02:35:42,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:42,274 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:42,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 140 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:35:42,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-04-03 02:35:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2023-04-03 02:35:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.423963133640553) internal successors, (309), 217 states have internal predecessors, (309), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 312 transitions. [2023-04-03 02:35:42,298 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 312 transitions. Word has length 38 [2023-04-03 02:35:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:42,299 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 312 transitions. [2023-04-03 02:35:42,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 312 transitions. [2023-04-03 02:35:42,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-03 02:35:42,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:42,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:42,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:35:42,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:42,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1636378340, now seen corresponding path program 1 times [2023-04-03 02:35:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:42,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8983663] [2023-04-03 02:35:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:42,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8983663] [2023-04-03 02:35:42,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8983663] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:42,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:42,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:42,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119801103] [2023-04-03 02:35:42,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:42,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:42,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:42,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:42,396 INFO L87 Difference]: Start difference. First operand 221 states and 312 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:42,506 INFO L93 Difference]: Finished difference Result 707 states and 1011 transitions. [2023-04-03 02:35:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:35:42,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-03 02:35:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:42,508 INFO L225 Difference]: With dead ends: 707 [2023-04-03 02:35:42,508 INFO L226 Difference]: Without dead ends: 509 [2023-04-03 02:35:42,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:42,510 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 162 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:42,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 274 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:35:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-04-03 02:35:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 505. [2023-04-03 02:35:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.4231536926147705) internal successors, (713), 501 states have internal predecessors, (713), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 716 transitions. [2023-04-03 02:35:42,624 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 716 transitions. Word has length 41 [2023-04-03 02:35:42,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:42,626 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 716 transitions. [2023-04-03 02:35:42,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 716 transitions. [2023-04-03 02:35:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:35:42,629 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:42,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:42,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:35:42,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:42,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:42,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1159174075, now seen corresponding path program 1 times [2023-04-03 02:35:42,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:42,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802171422] [2023-04-03 02:35:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:42,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:42,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:42,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802171422] [2023-04-03 02:35:42,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802171422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:42,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:42,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:42,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576946226] [2023-04-03 02:35:42,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:42,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:42,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:42,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:42,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:42,732 INFO L87 Difference]: Start difference. First operand 505 states and 716 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:42,988 INFO L93 Difference]: Finished difference Result 1287 states and 1850 transitions. [2023-04-03 02:35:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:35:42,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-03 02:35:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:42,996 INFO L225 Difference]: With dead ends: 1287 [2023-04-03 02:35:42,996 INFO L226 Difference]: Without dead ends: 805 [2023-04-03 02:35:42,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:43,000 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 336 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:43,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 89 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:35:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2023-04-03 02:35:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 803. [2023-04-03 02:35:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 799 states have (on average 1.4180225281602004) internal successors, (1133), 799 states have internal predecessors, (1133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1136 transitions. [2023-04-03 02:35:43,175 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1136 transitions. Word has length 43 [2023-04-03 02:35:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:43,175 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1136 transitions. [2023-04-03 02:35:43,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1136 transitions. [2023-04-03 02:35:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:35:43,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:43,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:43,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:35:43,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:43,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash 535323318, now seen corresponding path program 1 times [2023-04-03 02:35:43,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:43,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254567723] [2023-04-03 02:35:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:43,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:43,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:43,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254567723] [2023-04-03 02:35:43,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254567723] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:43,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:35:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159625145] [2023-04-03 02:35:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:35:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:35:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:35:43,442 INFO L87 Difference]: Start difference. First operand 803 states and 1136 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:43,784 INFO L93 Difference]: Finished difference Result 1482 states and 2099 transitions. [2023-04-03 02:35:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:35:43,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-03 02:35:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:43,789 INFO L225 Difference]: With dead ends: 1482 [2023-04-03 02:35:43,789 INFO L226 Difference]: Without dead ends: 1480 [2023-04-03 02:35:43,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:35:43,792 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 501 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:43,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 670 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:35:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-04-03 02:35:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 940. [2023-04-03 02:35:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 936 states have (on average 1.4166666666666667) internal successors, (1326), 936 states have internal predecessors, (1326), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1329 transitions. [2023-04-03 02:35:43,953 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1329 transitions. Word has length 43 [2023-04-03 02:35:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:43,954 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1329 transitions. [2023-04-03 02:35:43,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1329 transitions. [2023-04-03 02:35:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:35:43,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:43,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:43,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:35:43,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:43,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:43,957 INFO L85 PathProgramCache]: Analyzing trace with hash -706550833, now seen corresponding path program 1 times [2023-04-03 02:35:43,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:43,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353639576] [2023-04-03 02:35:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:43,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:44,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:44,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353639576] [2023-04-03 02:35:44,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353639576] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:35:44,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641008235] [2023-04-03 02:35:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:44,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:35:44,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:35:44,683 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) [2023-04-03 02:35:44,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:35:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:44,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-03 02:35:44,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:35:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:45,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:35:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:48,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641008235] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:35:48,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1219482661] [2023-04-03 02:35:48,160 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-04-03 02:35:48,160 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:35:48,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:35:48,168 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:35:48,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:35:48,541 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs [2023-04-03 02:36:11,303 WARN L223 SmtUtils]: Spent 21.55s on a formula simplification. DAG size of input: 6195 DAG size of output: 269 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:36:17,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 103 for LOIs [2023-04-03 02:36:17,099 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:36:24,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11392#(and (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (= ~nomsg~0 ~p2_old~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= main_~main__c1~0 0) (= main_~main__c1~0 ~__return_6426~0) (= main_~__tmp_1~0 0) (= ~nomsg~0 ~p2_new~0) (<= ~mode1~0 1) (or (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (and (<= 3 ~r1~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (= ~p3_old~0 ~nomsg~0) (<= 0 ~mode2~0) (= ~__return_6426~0 main_~check__tmp~0) (= main_~__tmp_1~0 main_~assert__arg~0))' at error location [2023-04-03 02:36:24,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:36:24,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:36:24,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 41 [2023-04-03 02:36:24,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457169388] [2023-04-03 02:36:24,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:36:24,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-03 02:36:24,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-03 02:36:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=5773, Unknown=0, NotChecked=0, Total=6642 [2023-04-03 02:36:24,381 INFO L87 Difference]: Start difference. First operand 940 states and 1329 transitions. Second operand has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:36:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:46,171 INFO L93 Difference]: Finished difference Result 10546 states and 14899 transitions. [2023-04-03 02:36:46,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2023-04-03 02:36:46,177 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-04-03 02:36:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:46,204 INFO L225 Difference]: With dead ends: 10546 [2023-04-03 02:36:46,204 INFO L226 Difference]: Without dead ends: 9657 [2023-04-03 02:36:46,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24523 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=9075, Invalid=49731, Unknown=0, NotChecked=0, Total=58806 [2023-04-03 02:36:46,216 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 6852 mSDsluCounter, 2291 mSDsCounter, 0 mSdLazyCounter, 3597 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6852 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 3984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 3597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:46,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6852 Valid, 2430 Invalid, 3984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 3597 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-03 02:36:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2023-04-03 02:36:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 4681. [2023-04-03 02:36:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4677 states have (on average 1.3769510369895233) internal successors, (6440), 4677 states have internal predecessors, (6440), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 6443 transitions. [2023-04-03 02:36:47,464 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 6443 transitions. Word has length 51 [2023-04-03 02:36:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:47,467 INFO L495 AbstractCegarLoop]: Abstraction has 4681 states and 6443 transitions. [2023-04-03 02:36:47,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:36:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 6443 transitions. [2023-04-03 02:36:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:36:47,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:47,470 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:47,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 02:36:47,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:36:47,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:47,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:47,676 INFO L85 PathProgramCache]: Analyzing trace with hash -114097242, now seen corresponding path program 1 times [2023-04-03 02:36:47,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:47,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190226813] [2023-04-03 02:36:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:47,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:36:47,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:47,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190226813] [2023-04-03 02:36:47,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190226813] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:47,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:47,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:36:47,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616446300] [2023-04-03 02:36:47,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:47,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:36:47,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:47,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:36:47,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:36:47,751 INFO L87 Difference]: Start difference. First operand 4681 states and 6443 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:49,583 INFO L93 Difference]: Finished difference Result 11819 states and 16410 transitions. [2023-04-03 02:36:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:36:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-03 02:36:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:49,602 INFO L225 Difference]: With dead ends: 11819 [2023-04-03 02:36:49,602 INFO L226 Difference]: Without dead ends: 7211 [2023-04-03 02:36:49,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:36:49,608 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 317 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:49,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 99 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:36:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7211 states. [2023-04-03 02:36:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7211 to 7209. [2023-04-03 02:36:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7209 states, 7205 states have (on average 1.3761276891047884) internal successors, (9915), 7205 states have internal predecessors, (9915), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7209 states to 7209 states and 9918 transitions. [2023-04-03 02:36:51,428 INFO L78 Accepts]: Start accepts. Automaton has 7209 states and 9918 transitions. Word has length 51 [2023-04-03 02:36:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:51,428 INFO L495 AbstractCegarLoop]: Abstraction has 7209 states and 9918 transitions. [2023-04-03 02:36:51,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 7209 states and 9918 transitions. [2023-04-03 02:36:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:36:51,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:51,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:51,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:36:51,429 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:51,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:51,430 INFO L85 PathProgramCache]: Analyzing trace with hash -928509237, now seen corresponding path program 1 times [2023-04-03 02:36:51,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:51,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974911473] [2023-04-03 02:36:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:51,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:52,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:52,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974911473] [2023-04-03 02:36:52,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974911473] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:36:52,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746354355] [2023-04-03 02:36:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:52,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:36:52,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:36:52,060 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) [2023-04-03 02:36:52,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:36:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:52,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-03 02:36:52,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:36:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:52,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:36:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:54,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746354355] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:36:54,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834462210] [2023-04-03 02:36:54,914 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-04-03 02:36:54,914 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:36:54,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:36:54,914 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:36:54,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:36:55,231 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs [2023-04-03 02:37:17,685 WARN L223 SmtUtils]: Spent 21.43s on a formula simplification. DAG size of input: 6195 DAG size of output: 269 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:37:23,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 103 for LOIs [2023-04-03 02:37:23,117 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:37:29,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67212#(and (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= main_~main__c1~0 0) (= main_~main__c1~0 ~__return_6426~0) (= main_~__tmp_1~0 0) (= ~nomsg~0 ~p2_new~0) (= ~nomsg~0 ~p1_old~0) (<= ~mode1~0 1) (or (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (and (<= 3 ~r1~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (= ~p3_old~0 ~nomsg~0) (<= 0 ~mode2~0) (= ~__return_6426~0 main_~check__tmp~0) (= main_~__tmp_1~0 main_~assert__arg~0))' at error location [2023-04-03 02:37:29,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:37:29,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:37:29,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 41 [2023-04-03 02:37:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443624114] [2023-04-03 02:37:29,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:37:29,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-03 02:37:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:29,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-03 02:37:29,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=5768, Unknown=0, NotChecked=0, Total=6642 [2023-04-03 02:37:29,459 INFO L87 Difference]: Start difference. First operand 7209 states and 9918 transitions. Second operand has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:37:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:55,042 INFO L93 Difference]: Finished difference Result 39280 states and 54110 transitions. [2023-04-03 02:37:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2023-04-03 02:37:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-04-03 02:37:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:55,109 INFO L225 Difference]: With dead ends: 39280 [2023-04-03 02:37:55,109 INFO L226 Difference]: Without dead ends: 30766 [2023-04-03 02:37:55,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24530 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=8434, Invalid=49406, Unknown=0, NotChecked=0, Total=57840 [2023-04-03 02:37:55,130 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 6357 mSDsluCounter, 3106 mSDsCounter, 0 mSdLazyCounter, 4710 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6357 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 5055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 4710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:55,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6357 Valid, 3278 Invalid, 5055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 4710 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-03 02:37:55,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30766 states. [2023-04-03 02:38:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30766 to 18648. [2023-04-03 02:38:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18648 states, 18644 states have (on average 1.3600085818493886) internal successors, (25356), 18644 states have internal predecessors, (25356), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18648 states to 18648 states and 25359 transitions. [2023-04-03 02:38:00,991 INFO L78 Accepts]: Start accepts. Automaton has 18648 states and 25359 transitions. Word has length 51 [2023-04-03 02:38:00,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:00,991 INFO L495 AbstractCegarLoop]: Abstraction has 18648 states and 25359 transitions. [2023-04-03 02:38:00,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:38:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 18648 states and 25359 transitions. [2023-04-03 02:38:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:38:00,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:00,993 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:01,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 02:38:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-03 02:38:01,195 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:01,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash 530434850, now seen corresponding path program 1 times [2023-04-03 02:38:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542613478] [2023-04-03 02:38:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:38:01,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:01,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542613478] [2023-04-03 02:38:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542613478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:01,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:01,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:38:01,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521433056] [2023-04-03 02:38:01,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:01,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:38:01,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:38:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:38:01,296 INFO L87 Difference]: Start difference. First operand 18648 states and 25359 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:09,724 INFO L93 Difference]: Finished difference Result 45540 states and 62297 transitions. [2023-04-03 02:38:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:38:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-03 02:38:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:09,776 INFO L225 Difference]: With dead ends: 45540 [2023-04-03 02:38:09,776 INFO L226 Difference]: Without dead ends: 27000 [2023-04-03 02:38:09,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:38:09,799 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 292 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:09,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 109 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:38:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27000 states. [2023-04-03 02:38:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27000 to 26880. [2023-04-03 02:38:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26880 states, 26876 states have (on average 1.357233219229052) internal successors, (36477), 26876 states have internal predecessors, (36477), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26880 states to 26880 states and 36480 transitions. [2023-04-03 02:38:17,866 INFO L78 Accepts]: Start accepts. Automaton has 26880 states and 36480 transitions. Word has length 53 [2023-04-03 02:38:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:17,866 INFO L495 AbstractCegarLoop]: Abstraction has 26880 states and 36480 transitions. [2023-04-03 02:38:17,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 26880 states and 36480 transitions. [2023-04-03 02:38:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:38:17,868 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:17,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:17,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:38:17,869 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:17,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:17,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2138367779, now seen corresponding path program 1 times [2023-04-03 02:38:17,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:17,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202435651] [2023-04-03 02:38:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:17,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:18,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202435651] [2023-04-03 02:38:18,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202435651] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:38:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055136686] [2023-04-03 02:38:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:18,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:38:18,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:38:18,415 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) [2023-04-03 02:38:18,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:38:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:18,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-03 02:38:18,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:38:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:19,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:38:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:21,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055136686] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:38:21,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873465162] [2023-04-03 02:38:21,600 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-04-03 02:38:21,600 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:38:21,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:38:21,601 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:38:21,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:38:21,824 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs [2023-04-03 02:38:44,683 WARN L223 SmtUtils]: Spent 21.81s on a formula simplification. DAG size of input: 6195 DAG size of output: 269 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:39:08,767 WARN L223 SmtUtils]: Spent 23.05s on a formula simplification. DAG size of input: 6501 DAG size of output: 319 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:39:38,310 WARN L223 SmtUtils]: Spent 28.47s on a formula simplification. DAG size of input: 7108 DAG size of output: 331 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:39:51,843 WARN L223 SmtUtils]: Spent 13.32s on a formula simplification. DAG size of input: 5167 DAG size of output: 360 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:40:06,760 WARN L223 SmtUtils]: Spent 13.61s on a formula simplification. DAG size of input: 5252 DAG size of output: 409 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)