/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:20:54,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:20:54,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:20:54,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:20:54,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:20:54,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:20:54,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:20:54,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:20:54,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:20:54,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:20:54,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:20:54,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:20:54,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:20:54,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:20:54,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:20:54,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:20:54,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:20:54,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:20:54,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:20:54,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:20:54,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:20:54,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:20:54,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:20:54,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:20:54,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:20:54,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:20:54,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:20:54,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:20:54,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:20:54,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:20:54,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:20:54,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:20:54,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:20:54,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:20:54,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:20:54,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:20:54,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:20:54,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:20:54,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:20:54,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:20:54,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:20:54,642 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:20:54,669 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:20:54,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:20:54,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:20:54,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:20:54,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:20:54,671 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:20:54,671 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:20:54,671 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:20:54,671 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:20:54,671 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:20:54,672 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:20:54,672 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:20:54,672 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:20:54,672 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:20:54,672 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:20:54,672 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:20:54,672 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:20:54,672 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:20:54,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:20:54,673 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:20:54,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:20:54,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:20:54,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:20:54,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:20:54,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:20:54,674 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:20:54,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:20:54,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:20:54,674 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:20:54,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:20:54,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:20:54,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:20:54,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:20:54,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:20:54,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:20:54,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:20:54,891 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:20:54,891 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:20:54,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound1.c [2023-04-01 11:20:55,976 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:20:56,075 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:20:56,076 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound1.c [2023-04-01 11:20:56,080 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570987da7/78b79f986d2240b2b992e9ffeeac17c5/FLAGa02c8dd8e [2023-04-01 11:20:56,088 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570987da7/78b79f986d2240b2b992e9ffeeac17c5 [2023-04-01 11:20:56,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:20:56,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:20:56,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:20:56,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:20:56,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:20:56,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e4a304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56, skipping insertion in model container [2023-04-01 11:20:56,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:20:56,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:20:56,236 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/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503] [2023-04-01 11:20:56,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:20:56,277 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:20:56,287 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/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503] [2023-04-01 11:20:56,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:20:56,321 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:20:56,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56 WrapperNode [2023-04-01 11:20:56,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:20:56,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:20:56,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:20:56,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:20:56,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,347 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:20:56,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:20:56,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:20:56,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:20:56,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (1/1) ... [2023-04-01 11:20:56,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:20:56,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:56,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:20:56,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:20:56,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:20:56,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:20:56,411 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:20:56,412 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:20:56,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:20:56,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:20:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:20:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:20:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:20:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:20:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:20:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:20:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:20:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:20:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:20:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:20:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:20:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:20:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:20:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:20:56,469 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:20:56,470 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:20:56,599 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:20:56,645 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:20:56,645 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:20:56,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:20:56 BoogieIcfgContainer [2023-04-01 11:20:56,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:20:56,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:20:56,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:20:56,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:20:56,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:20:56" (1/3) ... [2023-04-01 11:20:56,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7323602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:20:56, skipping insertion in model container [2023-04-01 11:20:56,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:56" (2/3) ... [2023-04-01 11:20:56,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7323602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:20:56, skipping insertion in model container [2023-04-01 11:20:56,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:20:56" (3/3) ... [2023-04-01 11:20:56,652 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound1.c [2023-04-01 11:20:56,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:20:56,664 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:20:56,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:20:56,711 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;@307ffb85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:20:56,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:20:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 11:20:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 11:20:56,720 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:56,720 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:56,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:56,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash -106415626, now seen corresponding path program 1 times [2023-04-01 11:20:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:56,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412456284] [2023-04-01 11:20:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:56,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:56,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:56,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135543444] [2023-04-01 11:20:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:56,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:56,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:56,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:20:56,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:20:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:56,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:20:56,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 11:20:56,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:20:56,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412456284] [2023-04-01 11:20:56,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:56,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135543444] [2023-04-01 11:20:56,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135543444] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:20:56,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:20:56,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:20:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232493088] [2023-04-01 11:20:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:20:56,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:20:56,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:20:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:20:56,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:20:56,993 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 11:20:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:20:57,021 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2023-04-01 11:20:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:20:57,023 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 30 [2023-04-01 11:20:57,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:20:57,028 INFO L225 Difference]: With dead ends: 57 [2023-04-01 11:20:57,028 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 11:20:57,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:20:57,033 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:20:57,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:20:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 11:20:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 11:20:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:20:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-04-01 11:20:57,066 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 30 [2023-04-01 11:20:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:20:57,067 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-04-01 11:20:57,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 11:20:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-04-01 11:20:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 11:20:57,071 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:57,071 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:57,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:20:57,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 11:20:57,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:57,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:57,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1527902876, now seen corresponding path program 1 times [2023-04-01 11:20:57,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:57,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139182014] [2023-04-01 11:20:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:57,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:57,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:57,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096254763] [2023-04-01 11:20:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:57,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:57,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:57,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:20:57,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:20:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:57,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:20:57,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 11:20:57,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:20:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 11:20:57,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:57,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139182014] [2023-04-01 11:20:57,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:57,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096254763] [2023-04-01 11:20:57,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096254763] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:20:57,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1055918213] [2023-04-01 11:20:57,601 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:20:57,601 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:20:57,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:20:57,607 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:20:57,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:20:57,756 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:20:58,567 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 11:20:58,574 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:20:58,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:20:58,582 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:01,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1055918213] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:21:01,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:21:01,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5] total 16 [2023-04-01 11:21:01,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072561896] [2023-04-01 11:21:01,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:21:01,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:21:01,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:21:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:21:01,330 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 13 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 9 states have internal predecessors, (10), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 11:21:02,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:02,894 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 11:21:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:21:02,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 9 states have internal predecessors, (10), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 6 states have call successors, (7) Word has length 31 [2023-04-01 11:21:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:02,895 INFO L225 Difference]: With dead ends: 42 [2023-04-01 11:21:02,895 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 11:21:02,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:21:02,897 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:02,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 7 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:21:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 11:21:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 11:21:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:21:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2023-04-01 11:21:02,909 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 31 [2023-04-01 11:21:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:02,910 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2023-04-01 11:21:02,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 9 states have internal predecessors, (10), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 11:21:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2023-04-01 11:21:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 11:21:02,911 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:02,911 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:21:02,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 11:21:03,117 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,SelfDestructingSolverStorable1 [2023-04-01 11:21:03,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:03,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash -115048975, now seen corresponding path program 1 times [2023-04-01 11:21:03,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:03,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030411188] [2023-04-01 11:21:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:03,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:03,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:03,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117600990] [2023-04-01 11:21:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:03,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:03,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:03,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:21:03,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:21:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:03,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 11:21:03,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 11:21:03,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 11:21:03,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:03,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030411188] [2023-04-01 11:21:03,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:03,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117600990] [2023-04-01 11:21:03,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117600990] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:21:03,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:21:03,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 11:21:03,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352755074] [2023-04-01 11:21:03,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:21:03,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:21:03,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:21:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-01 11:21:03,290 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 11:21:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:03,328 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 11:21:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:21:03,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 32 [2023-04-01 11:21:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:03,329 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:21:03,330 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 11:21:03,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:21:03,331 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 116 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 [2023-04-01 11:21:03,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:21:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 11:21:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-01 11:21:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:21:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-04-01 11:21:03,357 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 32 [2023-04-01 11:21:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:03,357 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-04-01 11:21:03,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 11:21:03,359 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-04-01 11:21:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 11:21:03,361 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:03,361 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-04-01 11:21:03,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 11:21:03,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:03,585 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:03,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:03,585 INFO L85 PathProgramCache]: Analyzing trace with hash 479602003, now seen corresponding path program 1 times [2023-04-01 11:21:03,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:03,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716779199] [2023-04-01 11:21:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:03,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:03,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:03,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642610924] [2023-04-01 11:21:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:03,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:03,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:03,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:21:03,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:21:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:03,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 11:21:03,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:21:03,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:03,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716779199] [2023-04-01 11:21:03,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642610924] [2023-04-01 11:21:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642610924] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:21:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306307322] [2023-04-01 11:21:03,829 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 11:21:03,829 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:21:03,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:21:03,829 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:21:03,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:21:03,853 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:21:04,351 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 11:21:04,363 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:21:04,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:21:04,370 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1306307322] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:21:06,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:21:06,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 21 [2023-04-01 11:21:06,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512904135] [2023-04-01 11:21:06,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:21:06,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:21:06,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:06,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:21:06,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-04-01 11:21:06,596 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 13 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 9 states have internal predecessors, (13), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 11:21:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:09,082 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2023-04-01 11:21:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:21:09,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 9 states have internal predecessors, (13), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 37 [2023-04-01 11:21:09,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:09,083 INFO L225 Difference]: With dead ends: 55 [2023-04-01 11:21:09,083 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 11:21:09,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:21:09,085 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 82 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:09,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 10 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 11:21:09,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 11:21:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-04-01 11:21:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:21:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-04-01 11:21:09,138 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 37 [2023-04-01 11:21:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:09,138 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-04-01 11:21:09,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 9 states have internal predecessors, (13), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 11:21:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-04-01 11:21:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 11:21:09,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:09,140 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 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] [2023-04-01 11:21:09,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 11:21:09,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:09,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:09,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1081154470, now seen corresponding path program 1 times [2023-04-01 11:21:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:09,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572420592] [2023-04-01 11:21:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:09,357 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:09,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597899357] [2023-04-01 11:21:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:09,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:09,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:09,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:21:09,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:21:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:09,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 11:21:09,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 11:21:09,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 11:21:09,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:09,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572420592] [2023-04-01 11:21:09,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:09,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597899357] [2023-04-01 11:21:09,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597899357] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:21:09,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444928250] [2023-04-01 11:21:09,548 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-01 11:21:09,548 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:21:09,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:21:09,548 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:21:09,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:21:09,589 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:21:12,085 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:21:12,088 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:21:12,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:21:12,093 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:20,673 WARN L223 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 121 DAG size of output: 113 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 11:21:37,275 WARN L223 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 119 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 11:21:37,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1596#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:21:37,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:21:37,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:21:37,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-04-01 11:21:37,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046960430] [2023-04-01 11:21:37,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:21:37,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:21:37,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:21:37,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=572, Unknown=1, NotChecked=0, Total=650 [2023-04-01 11:21:37,278 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 11:21:37,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:37,436 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2023-04-01 11:21:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:21:37,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2023-04-01 11:21:37,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:37,438 INFO L225 Difference]: With dead ends: 92 [2023-04-01 11:21:37,438 INFO L226 Difference]: Without dead ends: 84 [2023-04-01 11:21:37,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=102, Invalid=767, Unknown=1, NotChecked=0, Total=870 [2023-04-01 11:21:37,439 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:37,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:21:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-01 11:21:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2023-04-01 11:21:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 11:21:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2023-04-01 11:21:37,456 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 56 [2023-04-01 11:21:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:37,457 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2023-04-01 11:21:37,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 11:21:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2023-04-01 11:21:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 11:21:37,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:37,458 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 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] [2023-04-01 11:21:37,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:21:37,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:37,663 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:37,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:37,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1770268276, now seen corresponding path program 1 times [2023-04-01 11:21:37,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:37,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54256588] [2023-04-01 11:21:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:37,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:37,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:37,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475240532] [2023-04-01 11:21:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:37,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:37,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:37,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:21:37,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:21:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:37,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 11:21:37,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-01 11:21:37,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-01 11:21:37,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:37,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54256588] [2023-04-01 11:21:37,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:37,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475240532] [2023-04-01 11:21:37,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475240532] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:21:37,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831182191] [2023-04-01 11:21:37,848 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 11:21:37,848 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:21:37,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:21:37,849 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:21:37,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:21:37,867 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:21:41,297 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 11:21:41,322 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:21:41,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:21:41,326 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:44,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2252#(and (= (select |#length| 3) 12) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:21:44,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:21:44,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:21:44,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-04-01 11:21:44,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909572542] [2023-04-01 11:21:44,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:21:44,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:21:44,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:21:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-04-01 11:21:44,526 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-04-01 11:21:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:44,663 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2023-04-01 11:21:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:21:44,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 59 [2023-04-01 11:21:44,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:44,664 INFO L225 Difference]: With dead ends: 88 [2023-04-01 11:21:44,665 INFO L226 Difference]: Without dead ends: 86 [2023-04-01 11:21:44,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 146 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2023-04-01 11:21:44,665 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:44,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 151 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:21:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-01 11:21:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-04-01 11:21:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 32 states have call successors, (32), 9 states have call predecessors, (32), 8 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-04-01 11:21:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 114 transitions. [2023-04-01 11:21:44,685 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 114 transitions. Word has length 59 [2023-04-01 11:21:44,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:44,685 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 114 transitions. [2023-04-01 11:21:44,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-04-01 11:21:44,685 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 114 transitions. [2023-04-01 11:21:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 11:21:44,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:44,686 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 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] [2023-04-01 11:21:44,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:21:44,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:44,891 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:44,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash 167472073, now seen corresponding path program 1 times [2023-04-01 11:21:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340330723] [2023-04-01 11:21:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:44,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:44,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103853908] [2023-04-01 11:21:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:44,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:44,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:44,909 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:21:44,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:21:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:44,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 11:21:44,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 11:21:45,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-04-01 11:21:45,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:45,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340330723] [2023-04-01 11:21:45,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:45,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103853908] [2023-04-01 11:21:45,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103853908] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:21:45,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705163321] [2023-04-01 11:21:45,093 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-01 11:21:45,093 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:21:45,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:21:45,093 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:21:45,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:21:45,108 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:21:47,903 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-01 11:21:47,906 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:21:47,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:21:47,910 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:22:00,450 WARN L223 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 121 DAG size of output: 113 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)