/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/nla-digbench-scaling/ps4-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:26:29,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:26:29,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:26:29,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:26:29,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:26:29,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:26:29,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:26:29,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:26:29,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:26:29,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:26:29,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:26:29,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:26:29,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:26:29,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:26:29,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:26:29,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:26:29,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:26:29,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:26:29,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:26:29,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:26:29,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:26:29,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:26:29,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:26:29,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:26:29,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:26:29,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:26:29,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:26:29,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:26:29,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:26:29,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:26:29,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:26:29,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:26:29,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:26:29,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:26:29,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:26:29,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:26:29,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:26:29,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:26:29,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:26:29,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:26:29,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:26:29,566 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 23:26:29,600 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:26:29,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:26:29,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:26:29,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:26:29,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:26:29,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:26:29,602 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:26:29,602 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:26:29,602 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:26:29,602 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:26:29,602 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:26:29,602 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:26:29,603 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:26:29,603 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:26:29,603 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:26:29,603 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:26:29,603 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:26:29,603 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:26:29,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:26:29,604 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:26:29,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:26:29,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:26:29,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:26:29,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:26:29,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:26:29,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:26:29,605 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:26:29,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:26:29,605 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:26:29,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:26:29,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:26:29,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:26:29,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:26:29,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:26:29,606 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:26:29,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:26:29,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:26:29,606 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:26:29,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:26:29,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:26:29,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:26:29,607 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:26:29,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:26:29,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:26:29,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:26:29,870 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:26:29,870 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:26:29,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2023-04-02 23:26:31,028 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:26:31,203 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:26:31,203 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2023-04-02 23:26:31,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b7f39b3/69b3eadf39094261bfbf38b7ff2d20cb/FLAG357c1872a [2023-04-02 23:26:31,228 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b7f39b3/69b3eadf39094261bfbf38b7ff2d20cb [2023-04-02 23:26:31,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:26:31,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:26:31,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:26:31,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:26:31,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:26:31,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748e3302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31, skipping insertion in model container [2023-04-02 23:26:31,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:26:31,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:26:31,421 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c[458,471] [2023-04-02 23:26:31,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:26:31,448 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:26:31,460 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c[458,471] [2023-04-02 23:26:31,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:26:31,480 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:26:31,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31 WrapperNode [2023-04-02 23:26:31,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:26:31,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:26:31,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:26:31,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:26:31,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,504 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:26:31,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:26:31,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:26:31,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:26:31,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (1/1) ... [2023-04-02 23:26:31,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:26:31,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:26:31,536 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 23:26:31,538 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 23:26:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:26:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:26:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:26:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:26:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:26:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:26:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:26:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:26:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:26:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:26:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 23:26:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:26:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:26:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:26:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:26:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:26:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:26:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:26:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:26:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:26:31,622 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:26:31,624 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:26:31,815 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:26:31,833 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:26:31,834 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:26:31,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:26:31 BoogieIcfgContainer [2023-04-02 23:26:31,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:26:31,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:26:31,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:26:31,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:26:31,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:26:31" (1/3) ... [2023-04-02 23:26:31,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c27646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:26:31, skipping insertion in model container [2023-04-02 23:26:31,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:26:31" (2/3) ... [2023-04-02 23:26:31,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c27646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:26:31, skipping insertion in model container [2023-04-02 23:26:31,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:26:31" (3/3) ... [2023-04-02 23:26:31,842 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound10.c [2023-04-02 23:26:31,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:26:31,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:26:31,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:26:31,899 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;@2aef729, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:26:31,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:26:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:26:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 23:26:31,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:26:31,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:26:31,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:26:31,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:26:31,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1070716929, now seen corresponding path program 1 times [2023-04-02 23:26:31,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:26:31,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538768121] [2023-04-02 23:26:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:26:31,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:26:32,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:26:32,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702103958] [2023-04-02 23:26:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:26:32,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:26:32,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:26:32,013 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 23:26:32,014 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 23:26:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:26:32,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 23:26:32,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:26:32,176 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 23:26:32,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:26:32,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:26:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538768121] [2023-04-02 23:26:32,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:26:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702103958] [2023-04-02 23:26:32,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702103958] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:26:32,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:26:32,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:26:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608089763] [2023-04-02 23:26:32,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:26:32,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:26:32,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:26:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:26:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:26:32,208 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 23:26:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:26:32,279 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-04-02 23:26:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:26:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 14 [2023-04-02 23:26:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:26:32,287 INFO L225 Difference]: With dead ends: 50 [2023-04-02 23:26:32,287 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 23:26:32,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:26:32,292 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:26:32,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:26:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 23:26:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-02 23:26:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:26:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-02 23:26:32,323 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2023-04-02 23:26:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:26:32,323 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-02 23:26:32,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 23:26:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-02 23:26:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 23:26:32,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:26:32,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:26:32,334 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 23:26:32,525 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 23:26:32,526 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:26:32,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:26:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1540599750, now seen corresponding path program 1 times [2023-04-02 23:26:32,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:26:32,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063050906] [2023-04-02 23:26:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:26:32,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:26:32,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:26:32,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242897359] [2023-04-02 23:26:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:26:32,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:26:32,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:26:32,557 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 23:26:32,559 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 23:26:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:26:32,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:26:32,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:26:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:26:32,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:26:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:26:32,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:26:32,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063050906] [2023-04-02 23:26:32,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:26:32,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242897359] [2023-04-02 23:26:32,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242897359] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:26:32,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1072074162] [2023-04-02 23:26:32,928 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 23:26:32,928 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:26:32,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:26:32,934 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:26:32,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:26:32,996 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:26:33,394 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-02 23:26:33,486 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:26:33,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:26:33,501 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:26:42,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (exists ((v_main_~c~0_BEFORE_CALL_9 Int) (v_main_~k~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_13 Int) (v_main_~x~0_BEFORE_CALL_13 Int)) (and (not (= (* v_main_~x~0_BEFORE_CALL_13 4) (+ (* (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13) 2) (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13) (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13)))) (or (and (<= 1 |#StackHeapBarrier|) (<= v_main_~k~0_BEFORE_CALL_11 10) (= v_main_~y~0_BEFORE_CALL_13 0) (= v_main_~c~0_BEFORE_CALL_9 0) (= v_main_~x~0_BEFORE_CALL_13 0) (<= 0 v_main_~k~0_BEFORE_CALL_11) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (<= 1 (+ |#StackHeapBarrier| v_main_~k~0_BEFORE_CALL_11)) (<= 1 |#StackHeapBarrier|) (<= v_main_~c~0_BEFORE_CALL_9 v_main_~k~0_BEFORE_CALL_11) (<= v_main_~k~0_BEFORE_CALL_11 10) (<= v_main_~k~0_BEFORE_CALL_11 (+ 9 |#StackHeapBarrier|)) (<= 0 v_main_~k~0_BEFORE_CALL_11) (= |#NULL.offset| 0) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:26:42,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:26:42,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:26:42,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-04-02 23:26:42,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322639310] [2023-04-02 23:26:42,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:26:42,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:26:42,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:26:42,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:26:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=427, Unknown=4, NotChecked=0, Total=506 [2023-04-02 23:26:42,211 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:26:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:26:42,364 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-04-02 23:26:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:26:42,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-04-02 23:26:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:26:42,365 INFO L225 Difference]: With dead ends: 38 [2023-04-02 23:26:42,365 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 23:26:42,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=92, Invalid=504, Unknown=4, NotChecked=0, Total=600 [2023-04-02 23:26:42,367 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:26:42,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 107 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:26:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 23:26:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-04-02 23:26:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:26:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-04-02 23:26:42,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 21 [2023-04-02 23:26:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:26:42,374 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-04-02 23:26:42,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:26:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-04-02 23:26:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 23:26:42,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:26:42,375 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:26:42,384 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 23:26:42,581 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 23:26:42,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:26:42,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:26:42,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1414863620, now seen corresponding path program 1 times [2023-04-02 23:26:42,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:26:42,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835300114] [2023-04-02 23:26:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:26:42,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:26:42,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:26:42,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437621180] [2023-04-02 23:26:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:26:42,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:26:42,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:26:42,595 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 23:26:42,622 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 23:26:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:26:42,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 23:26:42,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:26:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 23:26:42,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:27:10,968 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_15 Int) (v_main_~y~0_BEFORE_CALL_17 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 3) (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 3) (* 2 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17)) 4) 0) (= (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17) (* v_main_~y~0_BEFORE_CALL_17 v_main_~k~0_BEFORE_CALL_15))))) is different from true [2023-04-02 23:27:29,044 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_15 Int) (v_main_~y~0_BEFORE_CALL_17 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 3) (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 3) (* 2 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17)) 4) 0) (= (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17) (* v_main_~y~0_BEFORE_CALL_17 v_main_~k~0_BEFORE_CALL_15)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-04-02 23:27:37,095 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false [2023-04-02 23:27:39,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:27:39,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835300114] [2023-04-02 23:27:39,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:27:39,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437621180] [2023-04-02 23:27:39,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437621180] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:27:39,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516115431] [2023-04-02 23:27:39,136 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:27:39,136 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:27:39,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:27:39,136 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:27:39,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:27:39,158 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:27:39,433 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:27:39,435 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:27:39,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:27:39,456 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:27:39,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '567#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:27:39,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:27:39,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:27:39,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-02 23:27:39,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621198232] [2023-04-02 23:27:39,881 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:27:39,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:27:39,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:27:39,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:27:39,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=512, Unknown=5, NotChecked=144, Total=756 [2023-04-02 23:27:39,883 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 23:27:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:27:39,983 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-04-02 23:27:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:27:39,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-04-02 23:27:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:27:39,984 INFO L225 Difference]: With dead ends: 36 [2023-04-02 23:27:39,984 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 23:27:39,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=110, Invalid=599, Unknown=5, NotChecked=156, Total=870 [2023-04-02 23:27:39,986 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:27:39,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 82 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:27:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 23:27:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-02 23:27:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:27:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-04-02 23:27:39,992 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2023-04-02 23:27:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:27:39,993 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-04-02 23:27:39,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 23:27:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-04-02 23:27:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 23:27:39,994 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:27:39,994 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:27:40,003 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 23:27:40,199 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 23:27:40,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:27:40,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:27:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1826650261, now seen corresponding path program 2 times [2023-04-02 23:27:40,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:27:40,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144284037] [2023-04-02 23:27:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:27:40,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:27:40,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:27:40,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588303019] [2023-04-02 23:27:40,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:27:40,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:27:40,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:27:40,213 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 23:27:40,215 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 23:27:40,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 23:27:40,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:27:40,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 23:27:40,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:27:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:27:40,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:28:14,570 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_33 Int) (v_main_~k~0_BEFORE_CALL_33 Int)) (or (= (+ v_main_~k~0_BEFORE_CALL_33 (* v_main_~y~0_BEFORE_CALL_33 v_main_~k~0_BEFORE_CALL_33)) (+ (* v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33) (* 2 v_main_~y~0_BEFORE_CALL_33) 1)) (= (mod (+ (* 2 v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33) (* v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 3) (* v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 3)) 4) 0)))) is different from true [2023-04-02 23:28:32,618 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_33 Int) (v_main_~k~0_BEFORE_CALL_33 Int)) (or (= (+ v_main_~k~0_BEFORE_CALL_33 (* v_main_~y~0_BEFORE_CALL_33 v_main_~k~0_BEFORE_CALL_33)) (+ (* v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33) (* 2 v_main_~y~0_BEFORE_CALL_33) 1)) (= (mod (+ (* 2 v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33) (* v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 3) (* v_main_~y~0_BEFORE_CALL_33 v_main_~y~0_BEFORE_CALL_33 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-04-02 23:28:38,653 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (forall ((main_~k~0 Int)) (or (<= main_~k~0 (+ c_main_~c~0 1)) (< (+ 2 c_main_~c~0) main_~k~0) (= (+ (* 4 c_main_~y~0) 4 (* c_main_~y~0 c_main_~y~0)) (+ (* main_~k~0 2) (* main_~k~0 c_main_~y~0)))))) is different from false [2023-04-02 23:28:40,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:28:40,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144284037] [2023-04-02 23:28:40,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:28:40,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588303019] [2023-04-02 23:28:40,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588303019] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:28:40,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296358364] [2023-04-02 23:28:40,676 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:28:40,676 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:28:40,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:28:40,677 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:28:40,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:28:40,691 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:28:40,913 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:28:40,918 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:28:40,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:28:40,926 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:28:41,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '862#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:28:41,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:28:41,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:28:41,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-02 23:28:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321597658] [2023-04-02 23:28:41,372 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:28:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 23:28:41,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:28:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 23:28:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=604, Unknown=7, NotChecked=156, Total=870 [2023-04-02 23:28:41,374 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 23:28:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:28:41,491 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-04-02 23:28:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:28:41,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2023-04-02 23:28:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:28:41,493 INFO L225 Difference]: With dead ends: 39 [2023-04-02 23:28:41,493 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 23:28:41,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=117, Invalid=700, Unknown=7, NotChecked=168, Total=992 [2023-04-02 23:28:41,494 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:28:41,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 100 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:28:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 23:28:41,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 23:28:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:28:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-04-02 23:28:41,502 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 34 [2023-04-02 23:28:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:28:41,502 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-04-02 23:28:41,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 23:28:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-04-02 23:28:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 23:28:41,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:28:41,504 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:28:41,509 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 23:28:41,705 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 23:28:41,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:28:41,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:28:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash 946034396, now seen corresponding path program 3 times [2023-04-02 23:28:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:28:41,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353532879] [2023-04-02 23:28:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:28:41,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:28:41,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:28:41,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627096008] [2023-04-02 23:28:41,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:28:41,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:28:41,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:28:41,727 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 23:28:41,728 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 23:28:41,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:28:41,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:28:41,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 23:28:41,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:28:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:28:41,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:29:16,849 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_49 Int) (v_main_~y~0_BEFORE_CALL_49 Int)) (or (= (* v_main_~y~0_BEFORE_CALL_49 v_main_~k~0_BEFORE_CALL_49) (* v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49)) (= (mod (+ (* v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 3) (* 2 v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49) (* v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 3)) 4) 0)))) is different from true [2023-04-02 23:29:34,912 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_49 Int) (v_main_~y~0_BEFORE_CALL_49 Int)) (or (= (* v_main_~y~0_BEFORE_CALL_49 v_main_~k~0_BEFORE_CALL_49) (* v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49)) (= (mod (+ (* v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 3) (* 2 v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49) (* v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 v_main_~y~0_BEFORE_CALL_49 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-04-02 23:29:40,942 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false [2023-04-02 23:29:42,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:29:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353532879] [2023-04-02 23:29:42,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:29:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627096008] [2023-04-02 23:29:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627096008] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:29:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489591355] [2023-04-02 23:29:42,963 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:29:42,963 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:29:42,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:29:42,963 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:29:42,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:29:42,976 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:29:43,181 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:29:43,183 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:29:43,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:29:43,189 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:29:43,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1167#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:29:43,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:29:43,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:29:43,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-02 23:29:43,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139914433] [2023-04-02 23:29:43,585 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:29:43,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:29:43,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:29:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:29:43,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=610, Unknown=5, NotChecked=156, Total=870 [2023-04-02 23:29:43,587 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:29:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:29:43,730 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2023-04-02 23:29:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 23:29:43,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2023-04-02 23:29:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:29:43,731 INFO L225 Difference]: With dead ends: 42 [2023-04-02 23:29:43,731 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 23:29:43,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=114, Invalid=705, Unknown=5, NotChecked=168, Total=992 [2023-04-02 23:29:43,732 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:29:43,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 110 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:29:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 23:29:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-02 23:29:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:29:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-04-02 23:29:43,739 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 41 [2023-04-02 23:29:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:29:43,739 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-04-02 23:29:43,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:29:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-04-02 23:29:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 23:29:43,740 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:29:43,740 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:29:43,747 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 23:29:43,945 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 23:29:43,945 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:29:43,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:29:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash -352441675, now seen corresponding path program 4 times [2023-04-02 23:29:43,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:29:43,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085644844] [2023-04-02 23:29:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:29:43,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:29:43,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:29:43,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385270866] [2023-04-02 23:29:43,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 23:29:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:29:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:29:43,956 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 23:29:43,961 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 23:29:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:29:44,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 23:29:44,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:29:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 23:29:44,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:30:12,839 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_66 Int) (v_main_~k~0_BEFORE_CALL_65 Int)) (or (= (mod (+ (* 2 v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66) (* v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 3) (* v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 3)) 4) 0) (= (* v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66) (* v_main_~y~0_BEFORE_CALL_66 v_main_~k~0_BEFORE_CALL_65))))) is different from true [2023-04-02 23:30:30,872 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((v_main_~y~0_BEFORE_CALL_66 Int) (v_main_~k~0_BEFORE_CALL_65 Int)) (or (= (mod (+ (* 2 v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66) (* v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 3) (* v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66 3)) 4) 0) (= (* v_main_~y~0_BEFORE_CALL_66 v_main_~y~0_BEFORE_CALL_66) (* v_main_~y~0_BEFORE_CALL_66 v_main_~k~0_BEFORE_CALL_65))))) is different from true [2023-04-02 23:30:36,894 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false [2023-04-02 23:30:38,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:30:38,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085644844] [2023-04-02 23:30:38,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:30:38,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385270866] [2023-04-02 23:30:38,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385270866] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:30:38,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1606263402] [2023-04-02 23:30:38,914 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:30:38,914 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:30:38,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:30:38,914 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:30:38,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:30:38,925 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:30:39,050 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:30:39,052 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:30:39,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:30:39,059 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:30:39,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1504#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:30:39,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:30:39,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:30:39,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-04-02 23:30:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18026084] [2023-04-02 23:30:39,405 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:30:39,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 23:30:39,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:30:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 23:30:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=621, Unknown=6, NotChecked=156, Total=870 [2023-04-02 23:30:39,406 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-02 23:30:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:30:39,571 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2023-04-02 23:30:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:30:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 48 [2023-04-02 23:30:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:30:39,573 INFO L225 Difference]: With dead ends: 45 [2023-04-02 23:30:39,573 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 23:30:39,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=102, Invalid=716, Unknown=6, NotChecked=168, Total=992 [2023-04-02 23:30:39,574 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:30:39,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 132 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:30:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 23:30:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-02 23:30:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 23:30:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-04-02 23:30:39,585 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 48 [2023-04-02 23:30:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:30:39,585 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-04-02 23:30:39,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-02 23:30:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-04-02 23:30:39,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 23:30:39,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:30:39,586 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:30:39,592 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 23:30:39,792 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 23:30:39,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:30:39,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:30:39,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1661009732, now seen corresponding path program 5 times [2023-04-02 23:30:39,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:30:39,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084146926] [2023-04-02 23:30:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:30:39,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:30:39,802 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:30:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821665792] [2023-04-02 23:30:39,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:30:39,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:30:39,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:30:39,803 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 23:30:39,805 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 23:30:39,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 23:30:39,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:30:39,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-02 23:30:39,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:30:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 23:30:39,991 INFO L327 TraceCheckSpWp]: Computing backward predicates...