/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/hard2_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:23:38,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:23:38,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:23:38,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:23:38,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:23:38,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:23:38,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:23:38,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:23:38,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:23:38,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:23:38,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:23:38,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:23:38,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:23:38,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:23:38,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:23:38,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:23:38,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:23:38,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:23:38,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:23:38,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:23:38,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:23:38,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:23:38,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:23:38,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:23:38,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 05:23:38,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:23:38,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:23:38,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:23:38,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:23:38,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:23:38,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:23:38,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:23:38,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:23:38,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:23:38,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:23:38,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:23:38,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:23:38,597 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:23:38,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:23:38,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:23:38,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:23:38,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:23:38,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:23:38,598 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:23:38,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:23:38,598 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:23:38,598 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:23:38,598 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:23:38,598 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:23:38,599 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:23:38,599 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:23:38,599 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:23:38,599 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:23:38,599 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:23:38,599 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:23:38,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:23:38,600 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:23:38,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:23:38,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:23:38,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:23:38,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:23:38,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:23:38,601 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:23:38,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:23:38,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:23:38,601 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:23:38,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:23:38,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:23:38,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:23:38,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:23:38,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:23:38,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:23:38,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:23:38,752 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:23:38,753 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:23:38,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c [2023-04-01 05:23:39,705 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:23:39,841 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:23:39,841 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c [2023-04-01 05:23:39,846 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa834ab74/b402cb22d3cb43c1973e7907cf26085e/FLAG39e797d1a [2023-04-01 05:23:39,859 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa834ab74/b402cb22d3cb43c1973e7907cf26085e [2023-04-01 05:23:39,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:23:39,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:23:39,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:23:39,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:23:39,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:23:39,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:23:39" (1/1) ... [2023-04-01 05:23:39,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc0e4e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:39, skipping insertion in model container [2023-04-01 05:23:39,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:23:39" (1/1) ... [2023-04-01 05:23:39,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:23:39,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:23:40,003 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/hard2_valuebound50.c[526,539] [2023-04-01 05:23:40,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:23:40,020 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:23:40,028 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/hard2_valuebound50.c[526,539] [2023-04-01 05:23:40,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:23:40,041 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:23:40,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40 WrapperNode [2023-04-01 05:23:40,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:23:40,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:23:40,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:23:40,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:23:40,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (1/1) ... [2023-04-01 05:23:40,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (1/1) ... [2023-04-01 05:23:40,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (1/1) ... [2023-04-01 05:23:40,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (1/1) ... [2023-04-01 05:23:40,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (1/1) ... [2023-04-01 05:23:40,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (1/1) ... [2023-04-01 05:23:40,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (1/1) ... [2023-04-01 05:23:40,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (1/1) ... [2023-04-01 05:23:40,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:23:40,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:23:40,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:23:40,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:23:40,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (1/1) ... [2023-04-01 05:23:40,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:23:40,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:23:40,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:23:40,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:23:40,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:23:40,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:23:40,119 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:23:40,119 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:23:40,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:23:40,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:23:40,119 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:23:40,119 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:23:40,119 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:23:40,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:23:40,179 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:23:40,180 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:23:40,342 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:23:40,366 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:23:40,366 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 05:23:40,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:23:40 BoogieIcfgContainer [2023-04-01 05:23:40,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:23:40,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:23:40,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:23:40,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:23:40,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:23:39" (1/3) ... [2023-04-01 05:23:40,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6044d66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:23:40, skipping insertion in model container [2023-04-01 05:23:40,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:23:40" (2/3) ... [2023-04-01 05:23:40,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6044d66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:23:40, skipping insertion in model container [2023-04-01 05:23:40,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:23:40" (3/3) ... [2023-04-01 05:23:40,374 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.c [2023-04-01 05:23:40,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:23:40,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:23:40,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:23:40,420 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;@ecdcf4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:23:40,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:23:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 05:23:40,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 05:23:40,428 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:23:40,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:23:40,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:23:40,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:23:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1934292817, now seen corresponding path program 1 times [2023-04-01 05:23:40,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:23:40,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066546220] [2023-04-01 05:23:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:40,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:23:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:23:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:23:40,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:23:40,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066546220] [2023-04-01 05:23:40,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066546220] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:23:40,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:23:40,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:23:40,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228600809] [2023-04-01 05:23:40,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:23:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:23:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:23:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:23:40,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:23:40,718 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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) [2023-04-01 05:23:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:23:40,803 INFO L93 Difference]: Finished difference Result 63 states and 100 transitions. [2023-04-01 05:23:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:23:40,805 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 [2023-04-01 05:23:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:23:40,809 INFO L225 Difference]: With dead ends: 63 [2023-04-01 05:23:40,810 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 05:23:40,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:23:40,814 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:23:40,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 99 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:23:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 05:23:40,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-04-01 05:23:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 05:23:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-04-01 05:23:40,856 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2023-04-01 05:23:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:23:40,856 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-04-01 05:23:40,856 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) [2023-04-01 05:23:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-04-01 05:23:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 05:23:40,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:23:40,857 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:23:40,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:23:40,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:23:40,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:23:40,858 INFO L85 PathProgramCache]: Analyzing trace with hash 667189618, now seen corresponding path program 1 times [2023-04-01 05:23:40,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:23:40,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129905192] [2023-04-01 05:23:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:40,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:23:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:23:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:23:40,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:23:40,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129905192] [2023-04-01 05:23:40,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129905192] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:23:40,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:23:40,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:23:40,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488036101] [2023-04-01 05:23:40,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:23:40,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:23:40,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:23:40,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:23:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:23:40,974 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:23:41,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:23:41,015 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-04-01 05:23:41,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:23:41,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-04-01 05:23:41,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:23:41,017 INFO L225 Difference]: With dead ends: 42 [2023-04-01 05:23:41,017 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 05:23:41,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:23:41,018 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:23:41,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 86 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:23:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 05:23:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-04-01 05:23:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 05:23:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 05:23:41,047 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2023-04-01 05:23:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:23:41,047 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 05:23:41,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:23:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 05:23:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 05:23:41,048 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:23:41,048 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:23:41,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:23:41,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:23:41,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:23:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash 203307953, now seen corresponding path program 1 times [2023-04-01 05:23:41,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:23:41,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413233106] [2023-04-01 05:23:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:41,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:23:41,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:23:41,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119912932] [2023-04-01 05:23:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:41,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:23:41,073 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:23:41,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:23:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:23:41,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 05:23:41,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:23:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:23:41,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:23:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:23:41,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:23:41,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413233106] [2023-04-01 05:23:41,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:23:41,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119912932] [2023-04-01 05:23:41,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119912932] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:23:41,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798211263] [2023-04-01 05:23:41,388 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:23:41,389 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:23:41,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:23:41,395 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:23:41,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:23:41,517 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:23:41,724 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-01 05:23:41,731 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-01 05:23:41,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:23:41,754 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:23:41,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1798211263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:23:41,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:23:41,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 7] total 22 [2023-04-01 05:23:41,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437509009] [2023-04-01 05:23:41,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:23:41,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:23:41,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:23:41,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:23:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:23:41,990 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 05:23:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:23:42,979 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2023-04-01 05:23:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:23:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-04-01 05:23:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:23:42,983 INFO L225 Difference]: With dead ends: 69 [2023-04-01 05:23:42,983 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 05:23:42,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2023-04-01 05:23:42,987 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:23:42,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 5 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:23:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 05:23:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-01 05:23:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 05:23:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-04-01 05:23:43,027 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 24 [2023-04-01 05:23:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:23:43,028 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-04-01 05:23:43,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 05:23:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-04-01 05:23:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 05:23:43,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:23:43,029 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:23:43,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:23:43,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:43,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:23:43,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:23:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash 856949456, now seen corresponding path program 1 times [2023-04-01 05:23:43,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:23:43,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103420432] [2023-04-01 05:23:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:23:43,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:23:43,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532489888] [2023-04-01 05:23:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:43,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:43,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:23:43,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:23:43,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:23:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:23:43,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 05:23:43,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:23:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 05:23:43,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:23:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 05:23:43,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:23:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103420432] [2023-04-01 05:23:43,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:23:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532489888] [2023-04-01 05:23:43,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532489888] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:23:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100200465] [2023-04-01 05:23:43,538 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 05:23:43,538 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:23:43,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:23:43,538 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:23:43,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:23:43,561 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:23:44,053 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:23:44,056 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-01 05:23:44,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:23:44,065 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:23:44,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '922#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:23:44,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:23:44,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:23:44,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-04-01 05:23:44,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934523165] [2023-04-01 05:23:44,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:23:44,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 05:23:44,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:23:44,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 05:23:44,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:23:44,404 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 05:23:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:23:44,595 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2023-04-01 05:23:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:23:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 41 [2023-04-01 05:23:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:23:44,599 INFO L225 Difference]: With dead ends: 85 [2023-04-01 05:23:44,599 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 05:23:44,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:23:44,600 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:23:44,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 119 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:23:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 05:23:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-04-01 05:23:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 05:23:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-04-01 05:23:44,619 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 41 [2023-04-01 05:23:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:23:44,619 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-04-01 05:23:44,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 05:23:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-04-01 05:23:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 05:23:44,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:23:44,620 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:23:44,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 05:23:44,827 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,SelfDestructingSolverStorable3 [2023-04-01 05:23:44,828 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:23:44,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:23:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1871718208, now seen corresponding path program 1 times [2023-04-01 05:23:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:23:44,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461655634] [2023-04-01 05:23:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:44,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:23:44,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:23:44,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928462484] [2023-04-01 05:23:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:44,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:44,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:23:44,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:23:44,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:23:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:23:44,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 05:23:44,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:23:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-01 05:23:44,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:23:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 05:23:45,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:23:45,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461655634] [2023-04-01 05:23:45,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:23:45,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928462484] [2023-04-01 05:23:45,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928462484] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:23:45,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600178028] [2023-04-01 05:23:45,037 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:23:45,037 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:23:45,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:23:45,038 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:23:45,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:23:45,073 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:23:45,461 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:23:45,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-01 05:23:45,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:23:45,473 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:23:45,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1476#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:23:45,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:23:45,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:23:45,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-04-01 05:23:45,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251556921] [2023-04-01 05:23:45,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:23:45,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:23:45,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:23:45,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:23:45,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-04-01 05:23:45,838 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 05:23:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:23:45,930 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-04-01 05:23:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:23:45,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 48 [2023-04-01 05:23:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:23:45,931 INFO L225 Difference]: With dead ends: 81 [2023-04-01 05:23:45,931 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 05:23:45,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:23:45,932 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:23:45,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 73 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:23:45,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 05:23:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-04-01 05:23:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 05:23:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2023-04-01 05:23:45,949 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 48 [2023-04-01 05:23:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:23:45,950 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2023-04-01 05:23:45,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 05:23:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2023-04-01 05:23:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 05:23:45,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:23:45,951 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:23:45,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:23:46,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:46,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:23:46,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:23:46,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1494414942, now seen corresponding path program 1 times [2023-04-01 05:23:46,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:23:46,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956222825] [2023-04-01 05:23:46,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:46,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:23:46,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:23:46,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885756508] [2023-04-01 05:23:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:46,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:46,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:23:46,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:23:46,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:23:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:23:46,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 05:23:46,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:23:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 05:23:46,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:23:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 05:23:47,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:23:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956222825] [2023-04-01 05:23:47,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:23:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885756508] [2023-04-01 05:23:47,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885756508] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:23:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1823373894] [2023-04-01 05:23:47,613 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:23:47,613 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:23:47,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:23:47,614 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:23:47,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:23:47,633 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:23:48,214 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:23:48,217 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-01 05:23:48,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:23:48,227 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:23:48,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2107#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:23:48,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:23:48,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:23:48,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-04-01 05:23:48,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863765495] [2023-04-01 05:23:48,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:23:48,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 05:23:48,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:23:48,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 05:23:48,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:23:48,676 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-01 05:23:49,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:23:49,950 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2023-04-01 05:23:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:23:49,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 60 [2023-04-01 05:23:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:23:49,953 INFO L225 Difference]: With dead ends: 104 [2023-04-01 05:23:49,953 INFO L226 Difference]: Without dead ends: 102 [2023-04-01 05:23:49,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:23:49,955 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 05:23:49,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 128 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 05:23:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-01 05:23:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2023-04-01 05:23:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 63 states have internal predecessors, (64), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 05:23:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2023-04-01 05:23:50,017 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 60 [2023-04-01 05:23:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:23:50,018 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2023-04-01 05:23:50,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-01 05:23:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2023-04-01 05:23:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 05:23:50,023 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:23:50,023 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:23:50,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 05:23:50,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:50,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:23:50,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:23:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash 920785569, now seen corresponding path program 1 times [2023-04-01 05:23:50,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:23:50,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782659185] [2023-04-01 05:23:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:50,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:23:50,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:23:50,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199871930] [2023-04-01 05:23:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:50,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:50,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:23:50,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:23:50,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:23:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:23:50,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 05:23:50,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:23:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-04-01 05:23:50,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:23:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-04-01 05:23:50,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:23:50,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782659185] [2023-04-01 05:23:50,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:23:50,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199871930] [2023-04-01 05:23:50,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199871930] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:23:50,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170934532] [2023-04-01 05:23:50,975 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 05:23:50,975 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:23:50,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:23:50,975 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:23:50,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:23:50,991 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:23:51,547 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:23:51,549 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-01 05:23:51,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:23:51,556 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:23:52,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2873#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:23:52,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:23:52,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:23:52,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-04-01 05:23:52,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121897901] [2023-04-01 05:23:52,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:23:52,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 05:23:52,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:23:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 05:23:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-04-01 05:23:52,006 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-04-01 05:23:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:23:52,443 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2023-04-01 05:23:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 05:23:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 71 [2023-04-01 05:23:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:23:52,445 INFO L225 Difference]: With dead ends: 122 [2023-04-01 05:23:52,445 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 05:23:52,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 05:23:52,446 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:23:52,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 100 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:23:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 05:23:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2023-04-01 05:23:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 05:23:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2023-04-01 05:23:52,480 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 71 [2023-04-01 05:23:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:23:52,481 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2023-04-01 05:23:52,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-04-01 05:23:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2023-04-01 05:23:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 05:23:52,482 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:23:52,482 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:23:52,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:23:52,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:52,688 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:23:52,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:23:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash -248496609, now seen corresponding path program 1 times [2023-04-01 05:23:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:23:52,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697340756] [2023-04-01 05:23:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:52,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:23:52,710 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:23:52,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225378359] [2023-04-01 05:23:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:52,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:52,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:23:52,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:23:52,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:23:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:23:52,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:23:52,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:23:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-04-01 05:23:52,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:23:52,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:23:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697340756] [2023-04-01 05:23:52,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:23:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225378359] [2023-04-01 05:23:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225378359] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:23:52,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:23:52,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:23:52,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657685064] [2023-04-01 05:23:52,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:23:52,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:23:52,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:23:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:23:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:23:52,788 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-01 05:23:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:23:52,839 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2023-04-01 05:23:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:23:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2023-04-01 05:23:52,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:23:52,844 INFO L225 Difference]: With dead ends: 100 [2023-04-01 05:23:52,845 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 05:23:52,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:23:52,846 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:23:52,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:23:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 05:23:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-04-01 05:23:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 05:23:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2023-04-01 05:23:52,872 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 81 [2023-04-01 05:23:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:23:52,872 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2023-04-01 05:23:52,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-01 05:23:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2023-04-01 05:23:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 05:23:52,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:23:52,873 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:23:52,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:23:53,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:53,078 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:23:53,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:23:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash 761596098, now seen corresponding path program 2 times [2023-04-01 05:23:53,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:23:53,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644217862] [2023-04-01 05:23:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:23:53,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:23:53,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:23:53,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867667288] [2023-04-01 05:23:53,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:23:53,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:23:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:23:53,103 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:23:53,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:23:53,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:23:53,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:23:53,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 05:23:53,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:23:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-04-01 05:23:53,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:23:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-04-01 05:23:53,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:23:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644217862] [2023-04-01 05:23:53,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:23:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867667288] [2023-04-01 05:23:53,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867667288] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:23:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368087610] [2023-04-01 05:23:53,999 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:23:53,999 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:23:54,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:23:54,000 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:23:54,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:23:54,019 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:23:54,580 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:23:54,582 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-01 05:23:54,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:23:54,589 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:23:55,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4239#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:23:55,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:23:55,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:23:55,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2023-04-01 05:23:55,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79641056] [2023-04-01 05:23:55,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:23:55,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 05:23:55,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:23:55,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 05:23:55,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-04-01 05:23:55,081 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2023-04-01 05:24:01,332 WARN L223 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 05:24:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:24:01,731 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2023-04-01 05:24:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:24:01,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 82 [2023-04-01 05:24:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:24:01,732 INFO L225 Difference]: With dead ends: 120 [2023-04-01 05:24:01,732 INFO L226 Difference]: Without dead ends: 118 [2023-04-01 05:24:01,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 211 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:24:01,733 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:24:01,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 138 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 05:24:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-04-01 05:24:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-04-01 05:24:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 70 states have internal predecessors, (73), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 05:24:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2023-04-01 05:24:01,768 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 82 [2023-04-01 05:24:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:24:01,769 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2023-04-01 05:24:01,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2023-04-01 05:24:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2023-04-01 05:24:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 05:24:01,769 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:24:01,770 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:24:01,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 05:24:01,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:24:01,974 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:24:01,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:24:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2082694307, now seen corresponding path program 3 times [2023-04-01 05:24:01,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:24:01,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286944840] [2023-04-01 05:24:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:24:01,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:24:01,987 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:24:01,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500098156] [2023-04-01 05:24:01,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:24:01,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:24:01,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:24:01,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:24:02,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:24:02,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:24:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:24:02,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-01 05:24:02,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:24:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 61 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-04-01 05:24:02,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:24:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 61 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-04-01 05:24:36,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:24:36,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286944840] [2023-04-01 05:24:36,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:24:36,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500098156] [2023-04-01 05:24:36,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500098156] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:24:36,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464703929] [2023-04-01 05:24:36,838 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:24:36,838 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:24:36,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:24:36,838 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:24:36,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:24:36,858 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:24:37,384 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:24:37,386 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-01 05:24:37,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:24:37,393 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:24:38,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5166#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:24:38,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:24:38,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:24:38,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2023-04-01 05:24:38,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657787538] [2023-04-01 05:24:38,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:24:38,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 05:24:38,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:24:38,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 05:24:38,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 05:24:38,471 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 15 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 11 states have call predecessors, (28), 13 states have call successors, (28)