/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/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:58:55,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:58:55,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:58:55,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:58:55,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:58:55,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:58:55,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:58:55,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:58:55,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:58:55,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:58:55,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:58:55,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:58:55,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:58:55,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:58:55,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:58:55,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:58:55,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:58:55,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:58:55,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:58:55,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:58:55,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:58:55,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:58:55,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:58:55,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:58:55,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:58:55,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:58:55,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:58:55,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:58:55,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:58:55,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:58:55,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:58:55,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:58:55,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:58:55,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:58:55,657 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:58:55,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:58:55,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:58:55,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:58:55,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:58:55,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:58:55,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:58:55,662 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 01:58:55,682 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:58:55,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:58:55,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:58:55,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:58:55,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:58:55,683 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:58:55,683 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:58:55,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:58:55,683 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:58:55,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:58:55,684 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:58:55,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:58:55,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:58:55,684 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:58:55,684 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:58:55,684 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:58:55,684 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:58:55,684 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:58:55,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:58:55,687 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:58:55,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:58:55,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:58:55,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:58:55,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:58:55,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:58:55,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:58:55,688 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:58:55,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:58:55,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:58:55,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:58:55,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:58:55,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:58:55,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:58:55,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:58:55,689 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:58:55,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:58:55,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:58:55,690 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:58:55,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:58:55,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:58:55,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:58:55,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:58:55,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:58:55,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:58:55,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:58:55,889 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:58:55,889 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:58:55,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c [2023-04-03 01:58:56,851 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:58:57,103 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:58:57,104 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c [2023-04-03 01:58:57,118 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8e6eae95/8bc87fc7074848ebb81d481c6bb35e86/FLAG0f3971534 [2023-04-03 01:58:57,129 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8e6eae95/8bc87fc7074848ebb81d481c6bb35e86 [2023-04-03 01:58:57,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:58:57,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:58:57,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:58:57,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:58:57,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:58:57,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7359e43c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57, skipping insertion in model container [2023-04-03 01:58:57,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:58:57,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:58:57,361 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/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c[14373,14386] [2023-04-03 01:58:57,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:58:57,375 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:58:57,433 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/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c[14373,14386] [2023-04-03 01:58:57,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:58:57,452 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:58:57,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57 WrapperNode [2023-04-03 01:58:57,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:58:57,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:58:57,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:58:57,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:58:57,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,503 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:58:57,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:58:57,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:58:57,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:58:57,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (1/1) ... [2023-04-03 01:58:57,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:58:57,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:58:57,531 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 01:58:57,533 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 01:58:57,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:58:57,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:58:57,558 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:58:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:58:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:58:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:58:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:58:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:58:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:58:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:58:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:58:57,665 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:58:57,666 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:58:58,043 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:58:58,380 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:58:58,380 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:58:58,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:58:58 BoogieIcfgContainer [2023-04-03 01:58:58,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:58:58,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:58:58,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:58:58,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:58:58,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:58:57" (1/3) ... [2023-04-03 01:58:58,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bb6b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:58:58, skipping insertion in model container [2023-04-03 01:58:58,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:58:57" (2/3) ... [2023-04-03 01:58:58,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bb6b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:58:58, skipping insertion in model container [2023-04-03 01:58:58,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:58:58" (3/3) ... [2023-04-03 01:58:58,390 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c [2023-04-03 01:58:58,401 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:58:58,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:58:58,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:58:58,439 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;@108afb83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:58:58,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:58:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 01:58:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-03 01:58:58,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:58:58,449 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] [2023-04-03 01:58:58,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:58:58,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:58:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1901202102, now seen corresponding path program 1 times [2023-04-03 01:58:58,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:58:58,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873284793] [2023-04-03 01:58:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:58:58,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:58:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:01,102 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 01:59:01,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:59:01,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873284793] [2023-04-03 01:59:01,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873284793] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:59:01,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:59:01,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 01:59:01,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518995619] [2023-04-03 01:59:01,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:59:01,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 01:59:01,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:59:01,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 01:59:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:59:01,133 INFO L87 Difference]: Start difference. First operand has 51 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:59:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:59:01,858 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2023-04-03 01:59:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 01:59:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2023-04-03 01:59:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:59:01,865 INFO L225 Difference]: With dead ends: 123 [2023-04-03 01:59:01,865 INFO L226 Difference]: Without dead ends: 76 [2023-04-03 01:59:01,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2023-04-03 01:59:01,869 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 270 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:59:01,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 176 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:59:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-03 01:59:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2023-04-03 01:59:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 39 states have internal predecessors, (49), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:59:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2023-04-03 01:59:01,900 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 34 [2023-04-03 01:59:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:59:01,900 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2023-04-03 01:59:01,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:59:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2023-04-03 01:59:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 01:59:01,901 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:59:01,901 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 01:59:01,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:59:01,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:59:01,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:59:01,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1112947322, now seen corresponding path program 1 times [2023-04-03 01:59:01,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:59:01,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51183375] [2023-04-03 01:59:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:59:01,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:59:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:03,071 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 01:59:03,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:59:03,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51183375] [2023-04-03 01:59:03,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51183375] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:59:03,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:59:03,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:59:03,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692919760] [2023-04-03 01:59:03,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:59:03,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:59:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:59:03,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:59:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:59:03,074 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:59:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:59:03,425 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2023-04-03 01:59:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:59:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2023-04-03 01:59:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:59:03,426 INFO L225 Difference]: With dead ends: 128 [2023-04-03 01:59:03,426 INFO L226 Difference]: Without dead ends: 91 [2023-04-03 01:59:03,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:59:03,428 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 135 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:59:03,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 106 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:59:03,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-03 01:59:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2023-04-03 01:59:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 40 states have internal predecessors, (50), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:59:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2023-04-03 01:59:03,440 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 35 [2023-04-03 01:59:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:59:03,440 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2023-04-03 01:59:03,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:59:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2023-04-03 01:59:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-03 01:59:03,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:59:03,441 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] [2023-04-03 01:59:03,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:59:03,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:59:03,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:59:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1340141517, now seen corresponding path program 1 times [2023-04-03 01:59:03,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:59:03,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728789149] [2023-04-03 01:59:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:59:03,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:59:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:04,586 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 01:59:04,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:59:04,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728789149] [2023-04-03 01:59:04,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728789149] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:59:04,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:59:04,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:59:04,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164215465] [2023-04-03 01:59:04,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:59:04,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:59:04,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:59:04,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:59:04,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:59:04,590 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:59:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:59:04,918 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2023-04-03 01:59:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:59:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 36 [2023-04-03 01:59:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:59:04,919 INFO L225 Difference]: With dead ends: 135 [2023-04-03 01:59:04,920 INFO L226 Difference]: Without dead ends: 98 [2023-04-03 01:59:04,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:59:04,922 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:59:04,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 107 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:59:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-03 01:59:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2023-04-03 01:59:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:59:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2023-04-03 01:59:04,935 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 36 [2023-04-03 01:59:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:59:04,935 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2023-04-03 01:59:04,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:59:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2023-04-03 01:59:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-03 01:59:04,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:59:04,938 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] [2023-04-03 01:59:04,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:59:04,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:59:04,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:59:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1313484431, now seen corresponding path program 1 times [2023-04-03 01:59:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:59:04,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110477624] [2023-04-03 01:59:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:59:04,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:59:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:05,948 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 01:59:05,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:59:05,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110477624] [2023-04-03 01:59:05,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110477624] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:59:05,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:59:05,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:59:05,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498660233] [2023-04-03 01:59:05,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:59:05,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:59:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:59:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:59:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:59:05,951 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:59:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:59:06,272 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2023-04-03 01:59:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:59:06,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2023-04-03 01:59:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:59:06,274 INFO L225 Difference]: With dead ends: 142 [2023-04-03 01:59:06,274 INFO L226 Difference]: Without dead ends: 105 [2023-04-03 01:59:06,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:59:06,275 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 151 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:59:06,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 101 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:59:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-03 01:59:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2023-04-03 01:59:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:59:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-04-03 01:59:06,285 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 37 [2023-04-03 01:59:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:59:06,286 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-04-03 01:59:06,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:59:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-04-03 01:59:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-03 01:59:06,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:59:06,286 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] [2023-04-03 01:59:06,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:59:06,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:59:06,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:59:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash 375765047, now seen corresponding path program 1 times [2023-04-03 01:59:06,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:59:06,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731309658] [2023-04-03 01:59:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:59:06,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:59:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:07,596 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 01:59:07,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:59:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731309658] [2023-04-03 01:59:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731309658] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:59:07,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:59:07,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 01:59:07,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268400064] [2023-04-03 01:59:07,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:59:07,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 01:59:07,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:59:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 01:59:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-03 01:59:07,598 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:59:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:59:08,393 INFO L93 Difference]: Finished difference Result 224 states and 272 transitions. [2023-04-03 01:59:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-03 01:59:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2023-04-03 01:59:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:59:08,398 INFO L225 Difference]: With dead ends: 224 [2023-04-03 01:59:08,398 INFO L226 Difference]: Without dead ends: 187 [2023-04-03 01:59:08,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 01:59:08,402 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 394 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:59:08,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 230 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:59:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-04-03 01:59:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 110. [2023-04-03 01:59:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 75 states have internal predecessors, (96), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2023-04-03 01:59:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2023-04-03 01:59:08,450 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 39 [2023-04-03 01:59:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:59:08,451 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2023-04-03 01:59:08,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:59:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2023-04-03 01:59:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-03 01:59:08,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:59:08,456 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] [2023-04-03 01:59:08,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:59:08,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:59:08,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:59:08,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1423667030, now seen corresponding path program 1 times [2023-04-03 01:59:08,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:59:08,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479531710] [2023-04-03 01:59:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:59:08,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:59:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:08,919 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 01:59:08,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:59:08,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479531710] [2023-04-03 01:59:08,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479531710] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:59:08,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:59:08,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:59:08,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587377585] [2023-04-03 01:59:08,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:59:08,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:59:08,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:59:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:59:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:59:08,921 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:59:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:59:09,192 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2023-04-03 01:59:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:59:09,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-04-03 01:59:09,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:59:09,193 INFO L225 Difference]: With dead ends: 180 [2023-04-03 01:59:09,193 INFO L226 Difference]: Without dead ends: 100 [2023-04-03 01:59:09,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:59:09,197 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:59:09,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 96 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:59:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-03 01:59:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2023-04-03 01:59:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:59:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2023-04-03 01:59:09,217 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 40 [2023-04-03 01:59:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:59:09,218 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2023-04-03 01:59:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:59:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2023-04-03 01:59:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 01:59:09,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:59:09,219 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] [2023-04-03 01:59:09,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:59:09,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:59:09,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:59:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1659490000, now seen corresponding path program 1 times [2023-04-03 01:59:09,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:59:09,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296288095] [2023-04-03 01:59:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:59:09,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:59:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:10,689 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 01:59:10,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:59:10,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296288095] [2023-04-03 01:59:10,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296288095] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:59:10,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:59:10,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 01:59:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604368985] [2023-04-03 01:59:10,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:59:10,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 01:59:10,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:59:10,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 01:59:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:59:10,691 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:59:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:59:11,370 INFO L93 Difference]: Finished difference Result 141 states and 162 transitions. [2023-04-03 01:59:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 01:59:11,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2023-04-03 01:59:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:59:11,371 INFO L225 Difference]: With dead ends: 141 [2023-04-03 01:59:11,371 INFO L226 Difference]: Without dead ends: 101 [2023-04-03 01:59:11,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2023-04-03 01:59:11,372 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 193 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:59:11,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 146 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:59:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-03 01:59:11,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2023-04-03 01:59:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:59:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2023-04-03 01:59:11,385 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 42 [2023-04-03 01:59:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:59:11,386 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2023-04-03 01:59:11,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:59:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2023-04-03 01:59:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 01:59:11,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:59:11,387 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 01:59:11,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:59:11,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:59:11,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:59:11,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1865376330, now seen corresponding path program 1 times [2023-04-03 01:59:11,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:59:11,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205182038] [2023-04-03 01:59:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:59:11,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:59:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:12,329 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 01:59:12,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:59:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205182038] [2023-04-03 01:59:12,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205182038] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:59:12,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:59:12,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 01:59:12,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050303010] [2023-04-03 01:59:12,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:59:12,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:59:12,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:59:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:59:12,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:59:12,335 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 01:59:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:59:12,561 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2023-04-03 01:59:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 01:59:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-03 01:59:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:59:12,564 INFO L225 Difference]: With dead ends: 110 [2023-04-03 01:59:12,564 INFO L226 Difference]: Without dead ends: 108 [2023-04-03 01:59:12,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:59:12,565 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 40 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:59:12,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 611 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:59:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-03 01:59:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2023-04-03 01:59:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-03 01:59:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-04-03 01:59:12,588 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 43 [2023-04-03 01:59:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:59:12,588 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-04-03 01:59:12,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 01:59:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-04-03 01:59:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-03 01:59:12,589 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:59:12,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:59:12,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 01:59:12,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:59:12,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:59:12,590 INFO L85 PathProgramCache]: Analyzing trace with hash -557968203, now seen corresponding path program 1 times [2023-04-03 01:59:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:59:12,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165641077] [2023-04-03 01:59:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:59:12,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:59:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:59:15,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:59:15,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165641077] [2023-04-03 01:59:15,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165641077] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:59:15,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940110022] [2023-04-03 01:59:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:59:15,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:59:15,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:59:15,480 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 01:59:15,481 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 01:59:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:59:15,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 84 conjunts are in the unsatisfiable core [2023-04-03 01:59:15,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:59:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:59:25,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:59:25,527 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 7864 disjunctions. This might take some time... [2023-04-03 01:59:28,430 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 7864 disjunctions.