/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/array-patterns/array29_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:11:00,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:11:00,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:11:00,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:11:00,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:11:00,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:11:00,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:11:00,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:11:00,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:11:00,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:11:00,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:11:00,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:11:00,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:11:00,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:11:00,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:11:00,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:11:00,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:11:00,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:11:00,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:11:00,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:11:00,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:11:00,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:11:00,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:11:00,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:11:00,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:11:00,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:11:00,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:11:00,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:11:00,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:11:00,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:11:00,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:11:00,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:11:00,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:11:00,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:11:00,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:11:00,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:11:00,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:11:00,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:11:00,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:11:00,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:11:00,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:11:00,955 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 [2023-04-02 15:11:00,985 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:11:00,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:11:00,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:11:00,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:11:00,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:11:00,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:11:00,987 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:11:00,988 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:11:00,988 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:11:00,988 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:11:00,989 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:11:00,989 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:11:00,989 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:11:00,989 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:11:00,989 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:11:00,989 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:11:00,990 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:11:00,990 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:11:00,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:11:00,990 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:11:00,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:11:00,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:11:00,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:11:00,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:11:00,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:11:00,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:11:00,991 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:11:00,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:11:00,992 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:11:00,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:11:00,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:11:00,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:11:00,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:11:00,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:11:00,993 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:11:00,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:11:00,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:11:00,993 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:11:00,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:11:00,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:11:00,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:11:00,993 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:11:01,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:11:01,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:11:01,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:11:01,232 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:11:01,232 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:11:01,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array29_pattern.c [2023-04-02 15:11:02,381 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:11:02,556 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:11:02,557 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c [2023-04-02 15:11:02,562 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89beae87b/51d44b4926de46aeb9a27da43ab086c4/FLAG80874148a [2023-04-02 15:11:02,574 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89beae87b/51d44b4926de46aeb9a27da43ab086c4 [2023-04-02 15:11:02,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:11:02,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:11:02,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:11:02,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:11:02,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:11:02,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d166a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02, skipping insertion in model container [2023-04-02 15:11:02,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:11:02,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:11:02,712 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/array-patterns/array29_pattern.c[1255,1268] [2023-04-02 15:11:02,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:11:02,733 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:11:02,743 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/array-patterns/array29_pattern.c[1255,1268] [2023-04-02 15:11:02,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:11:02,760 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:11:02,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02 WrapperNode [2023-04-02 15:11:02,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:11:02,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:11:02,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:11:02,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:11:02,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:11:02,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:11:02,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:11:02,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:11:02,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (1/1) ... [2023-04-02 15:11:02,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:11:02,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:11:02,814 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) [2023-04-02 15:11:02,822 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 [2023-04-02 15:11:02,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:11:02,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:11:02,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:11:02,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 15:11:02,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:11:02,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:11:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:11:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:11:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:11:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:11:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 15:11:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:11:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:11:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 15:11:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:11:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:11:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:11:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:11:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:11:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:11:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:11:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:11:02,909 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:11:02,911 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:11:03,155 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:11:03,213 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:11:03,213 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-02 15:11:03,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:11:03 BoogieIcfgContainer [2023-04-02 15:11:03,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:11:03,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:11:03,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:11:03,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:11:03,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:11:02" (1/3) ... [2023-04-02 15:11:03,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4cb995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:11:03, skipping insertion in model container [2023-04-02 15:11:03,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:02" (2/3) ... [2023-04-02 15:11:03,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4cb995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:11:03, skipping insertion in model container [2023-04-02 15:11:03,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:11:03" (3/3) ... [2023-04-02 15:11:03,233 INFO L112 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2023-04-02 15:11:03,260 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:11:03,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:11:03,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:11:03,323 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;@5942c945, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:11:03,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:11:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:11:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 15:11:03,339 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:11:03,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:11:03,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:11:03,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:11:03,347 INFO L85 PathProgramCache]: Analyzing trace with hash -88134273, now seen corresponding path program 1 times [2023-04-02 15:11:03,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:11:03,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073719904] [2023-04-02 15:11:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:03,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:11:03,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:11:03,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749255077] [2023-04-02 15:11:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:03,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:11:03,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:11:03,463 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) [2023-04-02 15:11:03,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:11:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:11:03,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 15:11:03,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:11:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:11:03,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:11:03,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:11:03,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073719904] [2023-04-02 15:11:03,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:11:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749255077] [2023-04-02 15:11:03,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749255077] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:11:03,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:11:03,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:11:03,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124614289] [2023-04-02 15:11:03,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:11:03,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:11:03,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:11:03,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:11:03,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:11:03,643 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:11:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:11:03,747 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2023-04-02 15:11:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:11:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-02 15:11:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:11:03,757 INFO L225 Difference]: With dead ends: 41 [2023-04-02 15:11:03,758 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 15:11:03,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:11:03,767 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:11:03,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 41 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:11:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 15:11:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-04-02 15:11:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:11:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-04-02 15:11:03,810 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2023-04-02 15:11:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:11:03,810 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-04-02 15:11:03,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:11:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-04-02 15:11:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 15:11:03,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:11:03,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:11:03,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 15:11:04,018 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 [2023-04-02 15:11:04,019 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:11:04,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:11:04,019 INFO L85 PathProgramCache]: Analyzing trace with hash -61829946, now seen corresponding path program 1 times [2023-04-02 15:11:04,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:11:04,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267045066] [2023-04-02 15:11:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:04,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:11:04,056 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:11:04,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191992553] [2023-04-02 15:11:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:11:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:11:04,073 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) [2023-04-02 15:11:04,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:11:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:11:04,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:11:04,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:11:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 15:11:04,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:11:04,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:11:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267045066] [2023-04-02 15:11:04,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:11:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191992553] [2023-04-02 15:11:04,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191992553] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:11:04,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:11:04,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 15:11:04,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160757127] [2023-04-02 15:11:04,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:11:04,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:11:04,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:11:04,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:11:04,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:11:04,199 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:11:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:11:04,254 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-04-02 15:11:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 15:11:04,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-02 15:11:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:11:04,256 INFO L225 Difference]: With dead ends: 32 [2023-04-02 15:11:04,256 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 15:11:04,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:11:04,258 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:11:04,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:11:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 15:11:04,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 15:11:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:11:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-04-02 15:11:04,265 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2023-04-02 15:11:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:11:04,266 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-04-02 15:11:04,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:11:04,266 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-04-02 15:11:04,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 15:11:04,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:11:04,267 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] [2023-04-02 15:11:04,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 15:11:04,472 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 [2023-04-02 15:11:04,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:11:04,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:11:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2018137340, now seen corresponding path program 1 times [2023-04-02 15:11:04,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:11:04,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243473011] [2023-04-02 15:11:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:04,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:11:04,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:11:04,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845967771] [2023-04-02 15:11:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:04,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:11:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:11:04,501 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) [2023-04-02 15:11:04,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:11:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:11:04,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:11:04,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:11:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:11:04,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:11:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:11:04,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:11:04,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243473011] [2023-04-02 15:11:04,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:11:04,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845967771] [2023-04-02 15:11:04,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845967771] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:11:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424840905] [2023-04-02 15:11:04,740 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 15:11:04,740 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:11:04,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:11:04,751 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:11:04,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:11:04,868 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:11:05,570 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:11:05,587 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:11:05,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:11:05,599 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:11:33,537 WARN L223 SmtUtils]: Spent 13.34s on a formula simplification. DAG size of input: 22 DAG size of output: 13 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:11:48,933 WARN L223 SmtUtils]: Spent 15.34s on a formula simplification. DAG size of input: 25 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:11:48,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '454#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:11:48,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:11:48,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:11:48,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-04-02 15:11:48,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764567862] [2023-04-02 15:11:48,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:11:48,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:11:48,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:11:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:11:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=513, Unknown=6, NotChecked=0, Total=600 [2023-04-02 15:11:48,938 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:11:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:11:48,995 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-04-02 15:11:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:11:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-04-02 15:11:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:11:48,996 INFO L225 Difference]: With dead ends: 36 [2023-04-02 15:11:48,996 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 15:11:48,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=81, Invalid=513, Unknown=6, NotChecked=0, Total=600 [2023-04-02 15:11:48,998 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:11:48,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 23 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:11:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 15:11:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 15:11:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:11:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-04-02 15:11:49,003 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2023-04-02 15:11:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:11:49,004 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-04-02 15:11:49,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:11:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-04-02 15:11:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 15:11:49,005 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:11:49,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:11:49,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:11:49,205 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 [2023-04-02 15:11:49,206 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:11:49,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:11:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash 86494854, now seen corresponding path program 2 times [2023-04-02 15:11:49,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:11:49,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977865263] [2023-04-02 15:11:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:49,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:11:49,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:11:49,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418095087] [2023-04-02 15:11:49,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:11:49,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:11:49,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:11:49,228 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) [2023-04-02 15:11:49,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 15:11:49,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 15:11:49,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:11:49,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:11:49,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:11:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 15:11:49,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:11:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 15:11:49,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:11:49,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977865263] [2023-04-02 15:11:49,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:11:49,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418095087] [2023-04-02 15:11:49,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418095087] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:11:49,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520364043] [2023-04-02 15:11:49,479 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 15:11:49,479 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:11:49,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:11:49,480 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:11:49,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:11:49,510 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:11:49,914 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:11:49,923 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:11:49,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:11:49,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:12:04,160 WARN L223 SmtUtils]: Spent 11.71s on a formula simplification. DAG size of input: 22 DAG size of output: 13 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:12:16,264 WARN L223 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 25 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:12:16,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '719#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:12:16,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:12:16,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:12:16,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-04-02 15:12:16,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598189863] [2023-04-02 15:12:16,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:12:16,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:12:16,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:12:16,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:12:16,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=517, Unknown=1, NotChecked=0, Total=600 [2023-04-02 15:12:16,268 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:12:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:12:16,333 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-04-02 15:12:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 15:12:16,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-04-02 15:12:16,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:12:16,335 INFO L225 Difference]: With dead ends: 48 [2023-04-02 15:12:16,335 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 15:12:16,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=89, Invalid=560, Unknown=1, NotChecked=0, Total=650 [2023-04-02 15:12:16,336 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:12:16,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 38 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:12:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 15:12:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-04-02 15:12:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:12:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-04-02 15:12:16,342 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 23 [2023-04-02 15:12:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:12:16,342 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-04-02 15:12:16,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:12:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-04-02 15:12:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 15:12:16,343 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:12:16,343 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:12:16,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 15:12:16,549 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 [2023-04-02 15:12:16,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:12:16,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:12:16,550 INFO L85 PathProgramCache]: Analyzing trace with hash -417862899, now seen corresponding path program 3 times [2023-04-02 15:12:16,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:12:16,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859516875] [2023-04-02 15:12:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:12:16,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:12:16,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:12:16,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054691248] [2023-04-02 15:12:16,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:12:16,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:12:16,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:12:16,573 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) [2023-04-02 15:12:16,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 15:12:16,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:12:16,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:12:16,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-02 15:12:16,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:12:16,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 15:12:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-02 15:12:16,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:16,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:16,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:12:16,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-04-02 15:12:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:16,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:16,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:12:16,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 15:12:17,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:17,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:17,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:12:17,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:12:17,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 13 [2023-04-02 15:12:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:12:17,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:12:18,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:12:18,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 63 [2023-04-02 15:12:18,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:12:18,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 52 [2023-04-02 15:12:18,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:12:18,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-04-02 15:12:18,978 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-04-02 15:12:18,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1842 treesize of output 1795 [2023-04-02 15:12:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:12:19,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:12:19,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859516875] [2023-04-02 15:12:19,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:12:19,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054691248] [2023-04-02 15:12:19,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054691248] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:12:19,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1133790639] [2023-04-02 15:12:19,674 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 15:12:19,675 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:12:19,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:12:19,675 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:12:19,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:12:19,695 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:12:19,970 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:12:19,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:12:19,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:12:19,988 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:12:23,001 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) c_~ARR_SIZE~0))) (or (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~sum~0_BEFORE_CALL_4 Int)) (not (= (+ (* 2 v_main_~sum~0_BEFORE_CALL_4) (* 2 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0))) .cse0)))) (and (= (mod .cse0 2) 0) (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2023-04-02 15:12:38,238 WARN L223 SmtUtils]: Spent 15.16s on a formula simplification. DAG size of input: 25 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:12:38,239 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1105#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:12:38,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:12:38,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:12:38,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2023-04-02 15:12:38,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888263296] [2023-04-02 15:12:38,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:12:38,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-02 15:12:38,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:12:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-02 15:12:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2678, Unknown=1, NotChecked=106, Total=3080 [2023-04-02 15:12:38,243 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 38 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:12:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:12:50,242 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2023-04-02 15:12:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-04-02 15:12:50,242 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 38 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-04-02 15:12:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:12:50,244 INFO L225 Difference]: With dead ends: 98 [2023-04-02 15:12:50,245 INFO L226 Difference]: Without dead ends: 84 [2023-04-02 15:12:50,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=938, Invalid=7806, Unknown=2, NotChecked=184, Total=8930 [2023-04-02 15:12:50,249 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 15:12:50,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 179 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 15:12:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-02 15:12:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2023-04-02 15:12:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 58 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:12:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2023-04-02 15:12:50,284 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 31 [2023-04-02 15:12:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:12:50,284 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2023-04-02 15:12:50,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 38 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:12:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2023-04-02 15:12:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 15:12:50,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:12:50,285 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:12:50,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 15:12:50,489 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 [2023-04-02 15:12:50,489 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:12:50,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:12:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1923004003, now seen corresponding path program 4 times [2023-04-02 15:12:50,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:12:50,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628378800] [2023-04-02 15:12:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:12:50,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:12:50,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:12:50,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935697344] [2023-04-02 15:12:50,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:12:50,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:12:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:12:50,515 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) [2023-04-02 15:12:50,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 15:12:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:12:50,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:12:50,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:12:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:12:50,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:12:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:12:50,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:12:50,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628378800] [2023-04-02 15:12:50,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:12:50,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935697344] [2023-04-02 15:12:50,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935697344] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:12:50,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1081398732] [2023-04-02 15:12:50,692 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 15:12:50,692 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:12:50,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:12:50,693 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:12:50,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:12:50,713 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:12:51,017 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:12:51,025 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:12:51,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:12:51,031 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:12:53,438 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) c_~ARR_SIZE~0))) (or (and (= (mod .cse0 2) 0) (= |c___VERIFIER_assert_#in~cond| 1)) (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~sum~0_BEFORE_CALL_5 Int)) (not (= .cse0 (+ (* 2 v_main_~sum~0_BEFORE_CALL_5) (* 2 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0))))))))) is different from true [2023-04-02 15:13:08,594 WARN L223 SmtUtils]: Spent 15.13s on a formula simplification. DAG size of input: 25 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:08,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1710#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:13:08,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:13:08,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:13:08,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-02 15:13:08,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331871345] [2023-04-02 15:13:08,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:13:08,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:13:08,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:13:08,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:13:08,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=619, Unknown=1, NotChecked=50, Total=756 [2023-04-02 15:13:08,597 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:13:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:13:08,765 INFO L93 Difference]: Finished difference Result 126 states and 165 transitions. [2023-04-02 15:13:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:13:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-04-02 15:13:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:13:08,767 INFO L225 Difference]: With dead ends: 126 [2023-04-02 15:13:08,767 INFO L226 Difference]: Without dead ends: 93 [2023-04-02 15:13:08,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=121, Invalid=812, Unknown=1, NotChecked=58, Total=992 [2023-04-02 15:13:08,768 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:13:08,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 46 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:13:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-02 15:13:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2023-04-02 15:13:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:13:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2023-04-02 15:13:08,818 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 32 [2023-04-02 15:13:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:13:08,818 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2023-04-02 15:13:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:13:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2023-04-02 15:13:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 15:13:08,819 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:13:08,819 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:13:08,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 15:13:09,025 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 [2023-04-02 15:13:09,025 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:13:09,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:13:09,026 INFO L85 PathProgramCache]: Analyzing trace with hash 609222139, now seen corresponding path program 5 times [2023-04-02 15:13:09,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:13:09,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176081467] [2023-04-02 15:13:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:13:09,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:13:09,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:13:09,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819714709] [2023-04-02 15:13:09,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:13:09,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:09,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:13:09,041 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) [2023-04-02 15:13:09,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 15:13:09,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 15:13:09,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:13:09,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:13:09,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:13:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:13:09,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:13:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:13:09,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:13:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176081467] [2023-04-02 15:13:09,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:13:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819714709] [2023-04-02 15:13:09,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819714709] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:13:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1677019218] [2023-04-02 15:13:09,264 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 15:13:09,264 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:13:09,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:13:09,265 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:13:09,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:13:09,282 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:13:09,547 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:13:09,554 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:13:09,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:13:09,559 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:13:24,556 WARN L223 SmtUtils]: Spent 12.59s on a formula simplification. DAG size of input: 22 DAG size of output: 13 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:39,766 WARN L223 SmtUtils]: Spent 15.19s on a formula simplification. DAG size of input: 25 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:39,767 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2321#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:13:39,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:13:39,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:13:39,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-02 15:13:39,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828726809] [2023-04-02 15:13:39,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:13:39,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:13:39,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:13:39,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:13:39,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=667, Unknown=1, NotChecked=0, Total=756 [2023-04-02 15:13:39,769 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:13:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:13:39,940 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2023-04-02 15:13:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 15:13:39,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2023-04-02 15:13:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:13:39,941 INFO L225 Difference]: With dead ends: 105 [2023-04-02 15:13:39,941 INFO L226 Difference]: Without dead ends: 78 [2023-04-02 15:13:39,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=122, Invalid=869, Unknown=1, NotChecked=0, Total=992 [2023-04-02 15:13:39,942 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:13:39,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:13:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-02 15:13:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2023-04-02 15:13:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:13:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2023-04-02 15:13:39,980 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 33 [2023-04-02 15:13:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:13:39,980 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2023-04-02 15:13:39,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:13:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2023-04-02 15:13:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 15:13:39,981 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:13:39,981 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:13:39,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 15:13:40,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:40,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:13:40,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:13:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2120787423, now seen corresponding path program 6 times [2023-04-02 15:13:40,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:13:40,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031487405] [2023-04-02 15:13:40,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:13:40,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:13:40,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:13:40,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903534193] [2023-04-02 15:13:40,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:13:40,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:40,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:13:40,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:13:40,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 15:13:40,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:13:40,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:13:40,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:13:40,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:13:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 15:13:40,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:13:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 15:13:40,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:13:40,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031487405] [2023-04-02 15:13:40,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:13:40,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903534193] [2023-04-02 15:13:40,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903534193] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:13:40,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1187748264] [2023-04-02 15:13:40,404 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 15:13:40,404 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:13:40,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:13:40,405 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:13:40,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:13:40,421 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:13:40,668 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:13:40,673 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:13:40,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:13:40,680 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:13:43,071 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) c_~ARR_SIZE~0))) (or (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~sum~0_BEFORE_CALL_7 Int)) (not (= .cse0 (+ (* 2 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0)) (* 2 v_main_~sum~0_BEFORE_CALL_7)))))) (and (= (mod .cse0 2) 0) (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2023-04-02 15:13:55,119 WARN L223 SmtUtils]: Spent 12.02s on a formula simplification. DAG size of input: 25 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:55,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2896#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:13:55,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:13:55,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:13:55,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-02 15:13:55,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111012392] [2023-04-02 15:13:55,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:13:55,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:13:55,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:13:55,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:13:55,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=618, Unknown=1, NotChecked=50, Total=756 [2023-04-02 15:13:55,121 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:13:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:13:55,394 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2023-04-02 15:13:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 15:13:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-04-02 15:13:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:13:55,395 INFO L225 Difference]: With dead ends: 89 [2023-04-02 15:13:55,395 INFO L226 Difference]: Without dead ends: 84 [2023-04-02 15:13:55,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=287, Invalid=1522, Unknown=1, NotChecked=82, Total=1892 [2023-04-02 15:13:55,396 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:13:55,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 91 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:13:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-02 15:13:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2023-04-02 15:13:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 68 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:13:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2023-04-02 15:13:55,432 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 35 [2023-04-02 15:13:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:13:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2023-04-02 15:13:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:13:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2023-04-02 15:13:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 15:13:55,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:13:55,434 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:13:55,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 15:13:55,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 15:13:55,639 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:13:55,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:13:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1357669509, now seen corresponding path program 7 times [2023-04-02 15:13:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:13:55,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354767192] [2023-04-02 15:13:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:13:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:13:55,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:13:55,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830826605] [2023-04-02 15:13:55,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:13:55,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:13:55,654 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:13:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 15:13:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:13:55,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:13:55,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:13:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 15:13:55,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:13:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 15:13:55,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:13:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354767192] [2023-04-02 15:13:55,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:13:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830826605] [2023-04-02 15:13:55,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830826605] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:13:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386300517] [2023-04-02 15:13:55,845 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 15:13:55,845 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:13:55,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:13:55,845 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:13:55,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:13:55,865 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:13:56,108 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:13:56,116 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:13:56,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:13:56,121 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:13:58,543 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) c_~ARR_SIZE~0))) (or (and (= (mod .cse0 2) 0) (= |c___VERIFIER_assert_#in~cond| 1)) (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~sum~0_BEFORE_CALL_8 Int)) (not (= .cse0 (+ (* 2 v_main_~sum~0_BEFORE_CALL_8) (* 2 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0))))))))) is different from true [2023-04-02 15:14:15,190 WARN L223 SmtUtils]: Spent 16.63s on a formula simplification. DAG size of input: 25 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:14:15,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3473#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:14:15,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:14:15,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:14:15,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-02 15:14:15,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577777334] [2023-04-02 15:14:15,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:14:15,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:14:15,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:14:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:14:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=612, Unknown=1, NotChecked=50, Total=756 [2023-04-02 15:14:15,192 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:14:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:14:15,395 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2023-04-02 15:14:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 15:14:15,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-04-02 15:14:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:14:15,396 INFO L225 Difference]: With dead ends: 94 [2023-04-02 15:14:15,396 INFO L226 Difference]: Without dead ends: 76 [2023-04-02 15:14:15,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=204, Invalid=1131, Unknown=1, NotChecked=70, Total=1406 [2023-04-02 15:14:15,397 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:14:15,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 68 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:14:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-02 15:14:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2023-04-02 15:14:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:14:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-04-02 15:14:15,432 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 35 [2023-04-02 15:14:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:14:15,432 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-04-02 15:14:15,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:14:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-04-02 15:14:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 15:14:15,433 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:14:15,433 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:14:15,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 15:14:15,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:14:15,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:14:15,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:14:15,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1800650693, now seen corresponding path program 8 times [2023-04-02 15:14:15,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:14:15,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620988940] [2023-04-02 15:14:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:14:15,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:14:15,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:14:15,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831348790] [2023-04-02 15:14:15,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:14:15,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:14:15,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:14:15,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:14:15,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 15:14:16,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 15:14:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:14:16,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:14:16,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:14:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-02 15:14:16,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:14:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-02 15:14:16,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:14:16,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620988940] [2023-04-02 15:14:16,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:14:16,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831348790] [2023-04-02 15:14:16,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831348790] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:14:16,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [335427663] [2023-04-02 15:14:16,487 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 15:14:16,487 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:14:16,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:14:16,488 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:14:16,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:14:16,504 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:14:16,745 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:14:16,752 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:14:16,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:14:16,756 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:14:19,166 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) c_~ARR_SIZE~0))) (or (and (exists ((v_main_~sum~0_BEFORE_CALL_9 Int)) (not (= .cse0 (+ (* 2 v_main_~sum~0_BEFORE_CALL_9) (* 2 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0)))))) (= |c___VERIFIER_assert_#in~cond| 0)) (and (= (mod .cse0 2) 0) (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2023-04-02 15:14:33,214 WARN L223 SmtUtils]: Spent 14.03s on a formula simplification. DAG size of input: 25 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:14:33,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4072#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:14:33,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:14:33,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:14:33,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-04-02 15:14:33,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008105074] [2023-04-02 15:14:33,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:14:33,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 15:14:33,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:14:33,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 15:14:33,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=723, Unknown=1, NotChecked=54, Total=870 [2023-04-02 15:14:33,217 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:14:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:14:33,536 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2023-04-02 15:14:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 15:14:33,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-04-02 15:14:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:14:33,537 INFO L225 Difference]: With dead ends: 105 [2023-04-02 15:14:33,537 INFO L226 Difference]: Without dead ends: 84 [2023-04-02 15:14:33,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=243, Invalid=1400, Unknown=1, NotChecked=78, Total=1722 [2023-04-02 15:14:33,539 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:14:33,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 78 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:14:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-02 15:14:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2023-04-02 15:14:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:14:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2023-04-02 15:14:33,581 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 40 [2023-04-02 15:14:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:14:33,581 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2023-04-02 15:14:33,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:14:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2023-04-02 15:14:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 15:14:33,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:14:33,584 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:14:33,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 15:14:33,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 15:14:33,785 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:14:33,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:14:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash 436802404, now seen corresponding path program 9 times [2023-04-02 15:14:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:14:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421891397] [2023-04-02 15:14:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:14:33,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:14:33,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:14:33,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321388548] [2023-04-02 15:14:33,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:14:33,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:14:33,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:14:33,798 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:14:33,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 15:14:34,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:14:34,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:14:34,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 120 conjunts are in the unsatisfiable core [2023-04-02 15:14:34,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:14:34,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 15:14:34,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 15:14:34,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:14:34,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-04-02 15:14:34,431 INFO L321 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2023-04-02 15:14:34,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2023-04-02 15:14:34,503 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2023-04-02 15:14:34,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 53 treesize of output 61 [2023-04-02 15:14:34,586 INFO L321 Elim1Store]: treesize reduction 110, result has 19.1 percent of original size [2023-04-02 15:14:34,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 76 [2023-04-02 15:14:34,793 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2023-04-02 15:14:34,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 76 treesize of output 90 [2023-04-02 15:14:34,943 INFO L321 Elim1Store]: treesize reduction 202, result has 18.2 percent of original size [2023-04-02 15:14:34,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 88 treesize of output 105 [2023-04-02 15:14:35,092 INFO L321 Elim1Store]: treesize reduction 260, result has 16.7 percent of original size [2023-04-02 15:14:35,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 100 treesize of output 120 [2023-04-02 15:14:36,707 INFO L321 Elim1Store]: treesize reduction 439, result has 2.2 percent of original size [2023-04-02 15:14:36,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 138 treesize of output 44 [2023-04-02 15:14:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:14:36,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:14:39,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,700 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,700 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,700 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,702 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,702 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,702 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,703 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,703 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,704 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,704 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,704 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,705 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,705 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,707 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,707 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,708 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,708 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:14:39,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 43 [2023-04-02 15:14:41,098 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-02 15:14:45,850 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-02 15:15:05,827 INFO L321 Elim1Store]: treesize reduction 219, result has 0.5 percent of original size [2023-04-02 15:15:05,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 99976713737876 treesize of output 83342305400468